Londonderry, Northern Ireland
Best weekend slot
Saturday 8am–11am
Verdict: Good
rain earlier today, ground soft in places
Next mow
Tomorrow 9am–midday
Verdict: Good
grass dry — rain earlier today
The next 10 days
Column height is how mowable the day is; the lighter band is the best stretch within it. The line is soil temperature at 6cm.
9°C — seeding
Soil at 6cm 15.9°C cooling to 13.0°C
Wednesday 2 September: Marginal. No — 0.1mm of rain falling.
Wednesday 2 SeptemberConfident
No — 0.1mm of rain falling.
- Poor:Grass wetness
- Grass wetrain earlier today
- Marginal:Ground firmness
- Ground soft in places32mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.84
- Good:Temperature
- Temperature15°C
- Good:Wind
- Wind light2 km/h
Limiting factor:grass wetness
Thursday 3 September: Good. 1pm–9pm — ground soft in places — 26mm rain over the last week
Thursday 3 September · 1pm–9pmConfident
1pm–9pm — ground soft in places — 26mm rain over the last week
- Good:Grass wetness
- Grass drydried off since a shower 0 hours ago
- Good:Ground firmness
- Ground soft in places26mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.81
- Good:Temperature
- Temperature14°C
- Good:Wind
- Wind light11 km/h
- Sociable hours
- Fine by the neighboursstarts once the rain has passed
Limiting factor:ground firmness
Friday 4 September: Good. 8pm–9pm — dried off since a shower 1 hour ago, ground soft in places
Friday 4 September · 8pm–9pmConfident
8pm–9pm — dried off since a shower 1 hour ago, ground soft in places
- Good:Grass wetness
- Grass drydried off since a shower 3 hours ago
- Good:Ground firmness
- Ground soft in places27mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.57
- Good:Temperature
- Temperature13°C
- Good:Wind
- Wind light18 km/h
- Sociable hours
- Your neighbours will remember itstarts once the rain has passed
Limiting factor:none
Saturday 5 September: Good. 8am–11am — rain earlier today, ground soft in places
Saturday 5 September · 8am–11amConfident
8am–11am — rain earlier today, ground soft in places
- Good:Grass wetness
- Grass dryrain earlier today
- Good:Ground firmness
- Ground firm29mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.51
- Good:Temperature
- Temperature11°C
- Good:Wind
- Wind light12 km/h
- Sociable hours
- A bit early or late, but finestarts when it stops being antisocial
Limiting factor:none
Sunday 6 September: Not worth it. No — 6.4mm of rain falling.
Sunday 6 SeptemberReasonably confident
No — 6.4mm of rain falling.
- Poor:Grass wetness
- Grass wetraining now
- Poor:Ground firmness
- Ground saturated26mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.70
- Good:Temperature
- Temperature16°C
- Good:Wind
- Wind light13 km/h
Limiting factor:grass wetness
Monday 7 September: Good. No — 0.9mm of rain falling.
Monday 7 SeptemberReasonably confident
No — 0.9mm of rain falling.
- Marginal:Grass wetness
- Grass drydried off since a shower 1 hour ago
- Poor:Ground firmness
- Ground saturated58mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.53
- Good:Temperature
- Temperature13°C
- Good:Wind
- Wind light22 km/h
Limiting factor:ground firmness
Tuesday 8 September: Not worth it. No — ground waterlogged.
Tuesday 8 SeptemberReasonably confident
No — ground waterlogged.
- Poor:Grass wetness
- Grass dryrain earlier today
- Poor:Ground firmness
- Ground saturated60mm rain over the last week
- Good:Growth
- Growing steadilygrowth potential 0.36
- Good:Temperature
- Temperature11°C
- Good:Wind
- Wind light13 km/h
Limiting factor:ground firmness
Wednesday 9 September: Good. No — 0.1mm of rain falling.
Wednesday 9 SeptemberReasonably confident
No — 0.1mm of rain falling.
- Good:Grass wetness
- Grass drydried off since a shower 2 hours ago
- Poor:Ground firmness
- Ground saturated59mm rain over the last week
- Marginal:Growth
- Growing slowlygrowth potential 0.33
- Good:Temperature
- Temperature11°C
- Good:Wind
- Wind light21 km/h
Limiting factor:ground firmness
Thursday 10 September: Good. No — ground soft, 58mm rain over the last week.
Thursday 10 SeptemberLow confidence this far out
No — ground soft, 58mm rain over the last week.
- Good:Grass wetness
- Grass dryno rain since Wednesday
- Poor:Ground firmness
- Ground soft58mm rain over the last week
- Marginal:Growth
- Growing slowlygrowth potential 0.29
- Good:Temperature
- Temperature10°C
- Good:Wind
- Wind light9 km/h
Limiting factor:ground firmness
Friday 11 September: Good. 8am–2pm — ground soft — 58mm rain over the last week
Friday 11 September · 8am–2pmLow confidence this far out
8am–2pm — ground soft — 58mm rain over the last week
- Good:Grass wetness
- Grass dryno rain since Wednesday
- Poor:Ground firmness
- Ground soft58mm rain over the last week
- Good:Growth
- Growing steadilygrowth potential 0.46
- Good:Temperature
- Temperature11°C
- Good:Wind
- Wind light14 km/h
- Sociable hours
- A bit early or late, but finestarts when it stops being antisocial
Limiting factor:ground firmness
Soil temperature
14.4°C58°F
at 6cm — germination depth
Cooling over the next 11 days.
Seeding conditions are open — soil is 14.4°C at 6cm and holding above 9°C.
Almost every UK and Irish lawn is a ryegrass and fescue mix, whether it was sown or turfed. We assume that, and use9°C as the seeding threshold.
I know what grass I have
The differences are small. Ryegrass is the quickest off the mark; bluegrass is the slowest and wants the warmest soil. Everything else sits between.
| Species | Soil temp | Days |
|---|---|---|
| Perennial ryegrasslikely yours | 8°C | 5–10 |
| Red / chewings fescuelikely yours | 8–10°C | 10–14 |
| Tall fescue | 10–12°C | 10–14 |
| Browntop bentColonial bentgrass | 10–12°C | 14–21 |
| Smooth-stalked meadow grassKentucky bluegrass | 12–13°C | 14–28 |
What this means right now
Forecast from Open-Meteo, refreshed hourly. Soil temperature is modelled, not measured — how that works and where the thresholds come from.