Swansea, Wales
Best weekend slot
Saturday 8am–5pm
Verdict: Good
ground soft — 59mm rain over the last week
Next mow
Tomorrow midday–8pm
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 17.3°C cooling to 15.0°C
Wednesday 2 September: Not worth it. No — 0.1mm of rain falling.
Wednesday 2 SeptemberConfident
No — 0.1mm of rain falling.
- Poor:Grass wetness
- Grass wetraining now
- Poor:Ground firmness
- Ground soft59mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.92
- Good:Temperature
- Temperature17°C
- Good:Wind
- Wind light19 km/h
Limiting factor:grass wetness
Thursday 3 September: Good. midday–8pm — grass dry — rain earlier today
Thursday 3 September · midday–8pmConfident
midday–8pm — grass dry — rain earlier today
- Marginal:Grass wetness
- Grass dryrain earlier today
- Poor:Ground firmness
- Ground soft72mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.98
- Good:Temperature
- Temperature18°C
- Good:Wind
- Wind light13 km/h
- Sociable hours
- Fine by the neighboursstarts once the dew has burnt off
Limiting factor:grass wetness
Friday 4 September: Good. No — 0.7mm of rain falling.
Friday 4 SeptemberConfident
No — 0.7mm of rain falling.
- Poor:Grass wetness
- Grass dryrain earlier today
- Poor:Ground firmness
- Ground soft67mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.90
- Good:Temperature
- Temperature16°C
- Good:Wind
- Wind light19 km/h
Limiting factor:ground firmness
Saturday 5 September: Good. 8am–5pm — ground soft — 59mm rain over the last week
Saturday 5 September · 8am–5pmConfident
8am–5pm — ground soft — 59mm rain over the last week
- Good:Grass wetness
- Grass dryno rain since Friday
- Marginal:Ground firmness
- Ground soft59mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.66
- Good:Temperature
- Temperature11°C
- Good:Wind
- Wind light2 km/h
- Sociable hours
- A bit early or late, but finestarts when it stops being antisocial
Limiting factor:ground firmness
Sunday 6 September: Marginal. No — 0.1mm of rain falling.
Sunday 6 SeptemberReasonably confident
No — 0.1mm of rain falling.
- Poor:Grass wetness
- Grass drydried off since a shower 0 hours ago
- Marginal:Ground firmness
- Ground soft in places46mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.93
- Good:Temperature
- Temperature17°C
- Good:Wind
- Wind light10 km/h
Limiting factor:grass wetness
Monday 7 September: Good. 11am–8pm — grass dry — rain earlier today
Monday 7 September · 11am–8pmReasonably confident
11am–8pm — grass dry — rain earlier today
- Marginal:Grass wetness
- Grass dryrain earlier today
- Marginal:Ground firmness
- Ground soft in places36mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.74
- Good:Temperature
- Temperature12°C
- Good:Wind
- Wind light7 km/h
- Sociable hours
- Fine by the neighboursstarts once the dew has burnt off
Limiting factor:grass wetness
Tuesday 8 September: Not worth it. No — 0.2mm of rain falling.
Tuesday 8 SeptemberReasonably confident
No — 0.2mm of rain falling.
- Poor:Grass wetness
- Grass wetraining now
- Poor:Ground firmness
- Ground soft35mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.72
- Good:Temperature
- Temperature14°C
- Good:Wind
- Wind light9 km/h
Limiting factor:grass wetness
Wednesday 9 September: Good. No — 0.8mm of rain falling.
Wednesday 9 SeptemberReasonably confident
No — 0.8mm of rain falling.
- Marginal:Grass wetness
- Grass dryrain earlier today
- Poor:Ground firmness
- Ground saturated59mm rain over the last week
- Good:Growth
- Growing steadilygrowth potential 0.48
- Good:Temperature
- Temperature12°C
- Good:Wind
- Wind light20 km/h
Limiting factor:ground firmness
Thursday 10 September: Good. No — ground saturated, 50mm rain over the last week.
Thursday 10 SeptemberLow confidence this far out
No — ground saturated, 50mm rain over the last week.
- Good:Grass wetness
- Grass dryno rain since Wednesday
- Poor:Ground firmness
- Ground saturated50mm rain over the last week
- Good:Growth
- Growing steadilygrowth potential 0.41
- Good:Temperature
- Temperature10°C
- Good:Wind
- Wind light3 km/h
Limiting factor:ground firmness
Friday 11 September: Good. 8am–8pm — ground soft — 49mm rain over the last week
Friday 11 September · 8am–8pmLow confidence this far out
8am–8pm — ground soft — 49mm rain over the last week
- Good:Grass wetness
- Grass dryno rain since Wednesday
- Poor:Ground firmness
- Ground soft49mm rain over the last week
- Good:Growth
- Growing wellgrowth potential 0.63
- Good:Temperature
- Temperature12°C
- Good:Wind
- Wind light16 km/h
- Sociable hours
- A bit early or late, but finestarts when it stops being antisocial
Limiting factor:ground firmness
Soil temperature
16.0°C61°F
at 6cm — germination depth
Cooling over the next 11 days.
Seeding conditions are open — soil is 16.0°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.