Soil temperature in Londonderry, Northern Ireland
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 |
Soil temperature at 6cm in Londonderry, Northern Ireland is currently 14.4°C, and falling about 2.0°C over the next 11 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. Seeding conditions are open — soil is 14.4°C at 6cm and holding above 9°C.
7 of the next 10 days are good mowing days. The other 3 are held back by wet grass or soft ground. The best weekend slot right now is Saturday 8am–11am, on the basis that rain earlier today, ground soft in places.
The next recommended window in Londonderry opens at 1pm on Thursday 3 September, because the rain clears by then. Underfoot, the ground reads as soft in places after 32mm rain over the last week.
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
Nearby
Your own postcode
These are town-centre figures. Yours will differ a little.