Soil temperature in Swindon, England

Soil temperature

15.9°C61°F

at 6cm — germination depth

Cooling over the next 11 days.

Seeding conditions are open — soil is 15.9°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.

Soil temperature at 6cm for reliable germination. Sources onthe method page.
SpeciesSoil tempDays
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

Soil temperature at 6cm in Swindon, England is currently 15.9°C, and falling about 2.7°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 15.9°C at 6cm and holding above 9°C.

10 of the next 10 days are good mowing days. The best weekend slot right now is Sunday 10am–8pm, on the basis that no rain since Friday, ground firm.

The next recommended window in Swindon opens at 2pm on Wednesday 2 September, because the rain clears by then. Underfoot, the ground reads as soft in places after 24mm rain over the last week.

See the full mowing forecast for Swindon

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 17.0°C cooling to 14.7°C

Wednesday 2 September: Good. 2pm–4pm — ground soft in places — 24mm rain over the last week

Wednesday 2 September · 2pm–4pmConfident

2pm–4pm — ground soft in places — 24mm rain over the last week

Good:Grass wetness
Grass dryno rain since Monday
Good:Ground firmness
Ground soft in places24mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.91
Good:Temperature
Temperature16°C
Good:Wind
Wind light12 km/h
Sociable hours
Fine by the neighboursstarts once the rain has passed

Limiting factor:ground firmness

Thursday 3 September: Good. 8am–8pm — ground firm — 26mm rain over the last week

Thursday 3 September · 8am–8pmConfident

8am–8pm — ground firm — 26mm rain over the last week

Good:Grass wetness
Grass dryrain earlier today
Good:Ground firmness
Ground firm26mm rain over the last week
Good:Growth
Growing wellgrowth potential 1.00
Good:Temperature
Temperature18°C
Good:Wind
Wind light18 km/h
Sociable hours
A bit early or late, but finestarts when it stops being antisocial

Limiting factor:ground firmness

Friday 4 September: Good. 2pm–8pm — dried off since a shower 1 hour ago, ground firm

Friday 4 September · 2pm–8pmConfident

2pm–8pm — dried off since a shower 1 hour ago, ground firm

Good:Grass wetness
Grass dryno rain since Wednesday
Good:Ground firmness
Ground firm22mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.98
Good:Temperature
Temperature19°C
Good:Wind
Wind light22 km/h
Sociable hours
Fine by the neighboursstarts once the rain has passed

Limiting factor:none

Saturday 5 September: Good. 8am–8pm — rain earlier today, ground firm

Saturday 5 September · 8am–8pmConfident

8am–8pm — rain earlier today, ground firm

Good:Grass wetness
Grass dryrain earlier today
Good:Ground firmness
Ground firm23mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.87
Good:Temperature
Temperature12°C
Good:Wind
Wind light6 km/h
Sociable hours
A bit early or late, but finestarts when it stops being antisocial

Limiting factor:none

Sunday 6 September: Good. 10am–8pm — no rain since Friday, ground firm

Sunday 6 September · 10am–8pmReasonably confident

10am–8pm — no rain since Friday, ground firm

Good:Grass wetness
Grass dryno rain since Friday
Good:Ground firmness
Ground firm9mm rain over the last week
Good:Growth
Growing wellgrowth potential 1.00
Good:Temperature
Temperature16°C
Good:Wind
Wind light9 km/h
Sociable hours
Fine by the neighboursstarts when it stops being antisocial

Limiting factor:none

Monday 7 September: Good. 8am–8pm — no rain since Friday, ground firm

Monday 7 September · 8am–8pmReasonably confident

8am–8pm — no rain since Friday, ground firm

Good:Grass wetness
Grass dryno rain since Friday
Good:Ground firmness
Ground firm6mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.84
Good:Temperature
Temperature13°C
Good:Wind
Wind light12 km/h
Sociable hours
A bit early or late, but finestarts when it stops being antisocial

Limiting factor:none

Tuesday 8 September: Good. 9am–2pm — grass dry — dried off since a shower 4 hours ago

Tuesday 8 September · 9am–2pmReasonably confident

9am–2pm — grass dry — dried off since a shower 4 hours ago

Poor:Grass wetness
Grass drydried off since a shower 4 hours ago
Good:Ground firmness
Ground firm4mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.69
Good:Temperature
Temperature14°C
Good:Wind
Wind light12 km/h
Sociable hours
A bit early or late, but finestarts once the dew has burnt off

Limiting factor:grass wetness

Wednesday 9 September: Good. 2pm–8pm — dried off since a shower 1 hour ago, ground firm

Wednesday 9 September · 2pm–8pmReasonably confident

2pm–8pm — dried off since a shower 1 hour ago, ground firm

Marginal:Grass wetness
Grass drydried off since a shower 0 hours ago
Good:Ground firmness
Ground firm13mm rain over the last week
Good:Growth
Growing steadilygrowth potential 0.46
Good:Temperature
Temperature11°C
Good:Wind
Wind light21 km/h
Sociable hours
Fine by the neighboursstarts once the rain has passed

Limiting factor:none

Thursday 10 September: Good. 10am–8pm — grass dry — rain earlier today

Thursday 10 September · 10am–8pmLow confidence this far out

10am–8pm — grass dry — rain earlier today

Good:Grass wetness
Grass dryrain earlier today
Good:Ground firmness
Ground firm14mm rain over the last week
Marginal:Growth
Growing slowlygrowth potential 0.29
Good:Temperature
Temperature11°C
Good:Wind
Wind light1 km/h
Sociable hours
Fine by the neighboursstarts once the dew has burnt off

Limiting factor:grass wetness

Friday 11 September: Good. 8am–8pm — no rain since Wednesday, ground firm

Friday 11 September · 8am–8pmLow confidence this far out

8am–8pm — no rain since Wednesday, ground firm

Good:Grass wetness
Grass dryno rain since Wednesday
Good:Ground firmness
Ground firm14mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.50
Good:Temperature
Temperature12°C
Good:Wind
Wind light9 km/h
Sociable hours
A bit early or late, but finestarts when it stops being antisocial

Limiting factor:none

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