Dublin, Leinster

Dublin, Leinster53.3331, -6.2489

Mowing

When you can next cut it, and the best slot this weekend.

Best weekend slot

Nothing doing

Verdict: Not worth it

conditions never quite get there.

Today morning is your first decent window.

Next mow

Today 8am–midday

Verdict: Touch and go, 45% chance it holds

temperature — 11°C

  • Worth watching: Ground still soft. 43mm rain over the last week, medium (loam) soil. A mower will mark it, and a ride-on will rut it. More

The next 10 days

Each row is a day, morning on the left. The more solid a block, the more of the forecast runs agree you can mow. Open a day for the hour-by-hour forecast behind it.

  1. Monday 19 October: 7 hours worth using. 4pm–7pm — dry again after a shower, ground firm
    Monday 19 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance———90%85%70%70%40%25%30%55%70%>95%>95%——
    VerdictAlready goneAlready goneAlready gonePrime timePrime timeGood to goGood to goTouch and goPushing itPushing itTouch and goGood to goPrime timePrime timedarkdark
    Rainchance···8%7%24%30%36%37%24%8%12%1%2%3%3%
    Rainmm···——0.10.20.20.20.1——————
    Grass···drydrydrydampdampwetwetdampdampdrydrydrydry
    Ground···firmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirm
    Temp···8°9°10°11°12°12°13°13°13°13°13°13°12°
    Windkm/h···78813191913181819151216
    Daylight···✓✓✓✓✓✓✓✓✓✓✓——

    Growth: barely growing (growth potential 0.15). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.Chance is the share of 91 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Monday 19 October · best slot4pm–7pmLow confidence this far out

    4pm–7pm — dry again after a shower, ground firm

    70% good to go — the chance it holds right through, not the chance at any one hour. About 1 run in 3 found the grass too wet.

    Also mowable today: 8am–midday (45%) — the chance each one holds right through

    Limiting factor:none

  2. Tuesday 20 October: 10 hours worth using. 9am–7pm — grass dry — rain earlier that day
    Tuesday 20 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance————>95%>95%>95%>95%>95%>95%>95%>95%90%90%——
    VerdictdarkdarkdarkdarkPrime timePrime timePrime timePrime timePrime timePrime timePrime timePrime timePrime timePrime timedarkdark
    Rainchance1%1%1%0%0%0%1%2%3%1%4%2%8%9%15%21%
    Rainmm——————————————0.10.1
    Grassdrydrydrydrydrydrydrydrydrydrydrydrydrydrydrydry
    Groundfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirm
    Temp10°10°10°10°10°11°12°13°14°14°14°15°14°14°13°13°
    Windkm/h7653467810911111212109
    Daylight————✓✓✓✓✓✓✓✓✓✓——

    Growth: growing slowly (growth potential 0.24). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.Chance is the share of 91 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Tuesday 20 October · 9am–7pmConfident

    9am–7pm — grass dry — rain earlier that day

    80% good to go — the chance it holds right through, not the chance at any one hour. About 1 run in 4 hit rain.

    Limiting factor:grass wetness

  3. Wednesday 21 October: nothing to cut. Nothing to cut — the grass is barely growing (growth potential 0.09). Conditions themselves are fine.
    Wednesday 21 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance————5%<5%<5%5%10%20%40%40%50%45%——
    Verdictnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growing
    Rainchance29%33%35%23%31%26%21%20%22%13%18%18%10%9%9%10%
    Rainmm0.60.70.60.30.70.60.40.30.40.10.20.1—0.1—0.1
    Grasssoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedwetwetwetwetwetwet
    Groundfirmfirmfirmfirmfirmfirmsoftsoftsoftsoftsoftsoftsoftsoftsoftsoft
    Temp8°8°7°7°7°7°8°9°10°10°11°11°11°10°10°10°
    Windkm/h2323222122222323232221191713108
    Daylight————✓✓✓✓✓✓✓✓✓✓——

    Growth: barely growing (growth potential 0.09). Not enough to be worth cutting, which is why no hour is recommended today whatever the weather does.Chance is the share of 91 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Wednesday 21 OctoberLow confidence this far out

    Nothing to cut — the grass is barely growing (growth potential 0.09). Conditions themselves are fine.

    50% nothing to cut. About half the runs found the grass barely growing.

    Nothing to cut. The odds below describe the weather only — growth decides whether a cut is wanted, and it is judged separately.

    Limiting factor:growth

  4. Thursday 22 October: nothing to cut. Nothing to cut — the grass is barely growing (growth potential 0.09). Conditions themselves are fine.
    Thursday 22 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance————30%30%40%45%60%50%55%45%45%30%——
    Verdictnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growing
    Rainchance1%0%0%5%2%2%4%4%4%39%36%44%43%47%42%49%
    Rainmm———0.1—————0.50.30.51.11.21.11.4
    Grasswetwetwetwetwetwetwetwetdampdampdampdampdampwetwetsoaked
    Groundsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftfirmfirmsoftsoftsoftsoft
    Temp6°6°6°6°7°8°9°10°11°12°12°12°12°12°12°11°
    Windkm/h181716151413107610172224252735
    Daylight————✓✓✓✓✓✓✓✓✓✓——

    Growth: barely growing (growth potential 0.09). Not enough to be worth cutting, which is why no hour is recommended today whatever the weather does.Chance is the share of 91 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Thursday 22 OctoberLow confidence this far out

    Nothing to cut — the grass is barely growing (growth potential 0.09). Conditions themselves are fine.

    60% nothing to cut. About 1 run in 3 found the grass barely growing.

    Nothing to cut. The odds below describe the weather only — growth decides whether a cut is wanted, and it is judged separately.

    Limiting factor:growth

  5. Friday 23 October: nothing to cut. Nothing to cut — the grass is barely growing (growth potential 0.08).
    Friday 23 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance————5%5%10%10%15%15%15%20%20%25%——
    Verdictnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growing
    Rainchance46%43%45%20%21%21%29%23%12%15%19%22%10%7%13%7%
    Rainmm1.00.70.90.30.50.70.40.40.10.20.30.30.10.2—0.1
    Grasssoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedwetwetwetdampdamp
    Groundsoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggy
    Temp9°9°10°9°8°7°7°7°8°8°9°9°9°9°8°8°
    Windkm/h391727384648454342424241403938
    Daylight————✓✓✓✓✓✓✓✓✓✓——

    Growth: barely growing (growth potential 0.08). Not enough to be worth cutting, which is why no hour is recommended today whatever the weather does.Chance is the share of 91 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Friday 23 OctoberReasonably confident

    Nothing to cut — the grass is barely growing (growth potential 0.08).

    25% nothing to cut. About 2 runs in 3 found the grass barely growing.

    Nothing to cut. The odds below describe the weather only — growth decides whether a cut is wanted, and it is judged separately.

    Limiting factor:growth

  6. Saturday 24 October: no hours worth using. No — 0.2mm of rain falling.
    Saturday 24 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance————15%15%10%10%10%10%10%<5%<5%<5%——
    VerdictdarkdarkdarkdarkForget itPushing itForget itForget itForget itForget itForget itForget itForget itForget itdarkdark
    Rainchance14%8%6%4%25%14%24%16%22%27%20%24%18%24%22%22%
    Rainmm0.20.10.20.10.70.30.50.30.40.80.40.40.40.40.50.3
    Grassdampdampdampdampdampwetwetwetwetwetwetsoakedsoakedsoakedsoakedsoaked
    Groundsoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggy
    Temp7°6°6°7°7°8°8°8°9°10°11°12°13°14°15°16°
    Windkm/h2321181410823242524232119171717
    Daylight————✓✓✓✓✓✓✓✓✓✓——

    Growth: barely growing (growth potential 0.14). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.Chance is the share of 91 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Saturday 24 OctoberReasonably confident

    No — 0.2mm of rain falling.

    15% pushing it. About 2 runs in 3 found the ground too soft.

    Limiting factor:ground firmness

  7. Sunday 25 October: no hours worth using. No — ground soft in places, 34mm rain over the last week, medium (loam) soil.
    Sunday 25 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance———10%20%20%25%40%35%35%40%45%35%———
    VerdictdarkdarkdarkForget itPushing itPushing itPushing itTouch and goPushing itPushing itPushing itTouch and goPushing itdarkdarkdark
    Rainchance16%20%18%10%12%14%16%10%12%14%29%18%22%16%10%4%
    Rainmm0.10.20.20.20.10.10.10.30.1—0.20.20.1—0.10.1
    Grasssoakedsoakedsoakedsoakedwetwetdampdampdampdampdampdampdampwetwetwet
    Groundsoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggy
    Temp17°18°18°18°19°16°14°12°10°10°9°9°9°8°8°8°
    Windkm/h2930323436343229242321191715129
    Daylight———✓✓✓✓✓✓✓✓✓✓———

    Growth: growing slowly (growth potential 0.26). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.Chance is the share of 91 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Sunday 25 OctoberLow confidence this far out

    No — ground soft in places, 34mm rain over the last week, medium (loam) soil.

    45% touch and go. About half the runs found the ground too soft.

    Limiting factor:ground firmness

  8. Monday 26 October: no hours worth using. No — 0.1mm of rain falling.
    Monday 26 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance———10%15%20%20%25%25%30%30%30%20%———
    VerdictdarkdarkdarkForget itForget itPushing itPushing itPushing itPushing itPushing itPushing itPushing itPushing itdarkdarkdark
    Rainchance14%14%20%10%12%16%14%12%27%12%14%14%25%14%22%16%
    Rainmm0.10.20.20.10.20.20.20.20.40.30.10.20.40.20.30.1
    Grasssoakedsoakedsoakedsoakedsoakedsoakedsoakedwetwetwetwetwetwetsoakedsoakedsoaked
    Groundsoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggy
    Temp10°10°11°11°11°12°12°12°12°12°12°12°11°11°11°11°
    Windkm/h171716141314161716141198767
    Daylight———✓✓✓✓✓✓✓✓✓✓———

    Growth: barely growing (growth potential 0.14). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.Chance is the share of 91 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Monday 26 OctoberLow confidence this far out

    No — 0.1mm of rain falling.

    30% pushing it. About 2 runs in 3 found the ground too soft.

    Limiting factor:ground firmness

  9. Tuesday 27 October: no hours worth using. No — 1.8mm of rain falling.
    Tuesday 27 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance———10%<5%5%<5%<5%<5%25%30%25%35%———
    VerdictdarkdarkdarkForget itForget itForget itground waterloggedground waterloggedground waterloggedPushing itPushing itPushing itPushing itdarkdarkdark
    Rainchance20%6%22%20%18%22%18%20%24%24%22%33%16%20%10%4%
    Rainmm0.4—0.20.20.20.20.20.20.20.10.30.30.20.10.10.1
    Grasssoakedsoakedsoakedsoakedsoakedsoakedsoakedwetwetwetwetwetwetwetwetwet
    Groundsoggysoggysoggysoggysoggysoggybogbogbogsoggysoggysoggysoggysoggysoggysoggy
    Temp10°10°10°11°11°12°12°13°13°12°12°12°11°11°11°10°
    Windkm/h11979142025293131302927262625
    Daylight———✓✓✓✓✓✓✓✓✓✓———

    Growth: barely growing (growth potential 0.15). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.Chance is the share of 91 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Tuesday 27 OctoberLow confidence this far out

    No — 1.8mm of rain falling.

    35% pushing it. About 2 runs in 3 found the grass too wet.

    Limiting factor:grass wetness

  10. Wednesday 28 October: no hours worth using. No — 0.1mm of rain falling.
    Wednesday 28 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance———35%40%45%45%45%45%45%45%50%50%———
    VerdictdarkdarkdarkPushing itPushing itTouch and goTouch and goTouch and goTouch and goTouch and goTouch and goTouch and goTouch and godarkdarkdark
    Rainchance16%4%8%10%0%8%6%4%4%12%18%10%10%14%4%6%
    Rainmm0.2————0.1———0.10.10.1—0.10.10.1
    Grassdampwetwetwetdampdampdampdampdampdampdampdampdampdampdampdamp
    Groundsoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggy
    Temp9°9°10°11°11°12°13°13°14°13°13°13°12°12°12°11°
    Windkm/h12111112131516161718202225272727
    Daylight———✓✓✓✓✓✓✓✓✓✓———

    Growth: barely growing (growth potential 0.16). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.Chance is the share of 91 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Wednesday 28 OctoberLow confidence this far out

    No — 0.1mm of rain falling.

    50% touch and go. About half the runs found the grass too wet.

    Limiting factor:grass wetness

good to go touch and go dark, frost or snow already goneFainter means fewer forecast runs agree.

How you feel about mowing

Sensible middle ground.

Petrol or battery. The baseline.

Growth

How fast it is growing, and when it will need cutting again.

15%Barely growing

Of the fastest this grass could grow. The turf-industry measure, from today's temperature and day length.

The lawn is barely growing, so it does not need cutting. Leave it — taking leaf off a sward that cannot replace it costs more than it gives.

Held back by both temperature and short days — 10.4 hours of daylight at 11°C.

Over the next 10 days
about 5mm of leaf
Next cut due
not within the next ten days

This only knows temperature and day length. Feeding, watering, shade and cutting height all move it, so treat it as a rough guide.

Worked out from the PACE Turf growth potential model and day length —how and why.

Seeding

Soil temperature at germination depth, and when the window opens.

Soil temperature in Dublin, Leinster

7.0°C45°F

at 6cm — germination depth

Soil is warming — it should cross 9°C in about 7 days, though the forecast doesn't run far enough to confirm it holds.

Warming over the next 10 days.

An independent estimate from air temperature gives 10.7°C, 1.9°C away. Treat the figure as approximate.

Almost every UK and Irish lawn is a ryegrass and fescue mix, whether it was sown or turfed. We assume that, and use 9°C as the seeding threshold.

Thresholds for every species

The differences are small. Ryegrass is the quickest off the mark; bluegrass is the slowest and wants the warmest soil. Everything else sits between.

Soil temperature at 6cm for reliable germination. Sources onthe method page.
SpeciesSoil neededDays to sprout
Perennial ryegrasslikely yours8°C5–10
Red / chewings fescuelikely yours8–10°C10–14
Tall fescue10–12°C10–14
Browntop bentColonial bentgrass10–12°C14–21
Smooth-stalked meadow grassKentucky bluegrass12–13°C14–28

Feeding

Why timing decides whether a feed does anything at all.

Coming in the app

Grass takes up nitrogen when it is growing. Feed a lawn that has stopped and most of it washes past the roots — which is why timing beats product choice.

Right now this lawn is not growing fast enough to make much use of a feed.

The app will work out the actual feeding windows for your lawn — along with weed control, scarifying and moss treatment — and tell you when they open without you having to check.

Why timing beats product choice

Dublin, Leinster in detail

Soil temperature in Dublin, Leinster is currently 7.0°C at 6cm, and rising about 1.1°C over the next 10 days. That depth matters because it is where grass seed sits and where roots start working, and it lags air temperature by days — which is why a warm afternoon here tells you very little on its own.

Lawns in this area are typically perennial ryegrass with fescue, which is what most lawns round here are sown with. That blend needs the soil to hold above 9°C before seed germinates reliably. Soil is warming — it should cross 9°C in about 7 days, though the forecast doesn't run far enough to confirm it holds.

5 of the next 10 days look workable. As for the weekend: nothing doing. conditions never quite get there.

The next recommended window in Dublin opens at 4pm on Monday 19 October, and holds while conditions stay put. Underfoot, the ground reads as firm after 10mm rain over the last week, medium (loam) soil.

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Chances counted across 91 forecast runs from ICON-EU-EPS, 7km and ECMWF IFS ensemble, 25km. Forecast from Open-Meteo, refreshed through the day. Soil temperature is modelled, not measured — how that works and where the thresholds come from.