Climate averages 1991–2020
Southend-on-Sea weather
in August.
A mild, moderately wet month: one of the warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Southend-on-Sea: daytime highs average 20.8°C and nights cool to about 14.6°C. By daytime temperature it is one of the warmest months of the year.
Expect about 63 mm of rain on roughly 10 days, which makes August a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 37 min on an average August day.
The nearest other city in this atlas is Basildon (18 km away). In August its highs average 20.9°C, about as warm as Southend-on-Sea, with 58 mm of rain.
Among the 143 cities listed in the United Kingdom, Southend-on-Sea ranks joint 28th of 143 for the warmest August highs and joint 57th of 143 for the driest August (rainfall, lowest first). The mean August high of those 143 cities is 19.7°C; Southend-on-Sea is 1.1°C warmer than that mean.
From August to September, average highs fall by 2.7°C to 18.1°C, and monthly rainfall falls from 63 mm to 56 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Southend-on-Sea climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.2°C3.3°C | 3.3°C | 67 | 13.3 | 8.48 h |
| February | 7.5°C3.1°C | 3.1°C | 55 | 10.9 | 9.910 h |
| March | 9.6°C4.4°C | 4.4°C | 46 | 10.2 | 11.812 h |
| April | 12.4°C6.3°C | 6.3°C | 47 | 10.0 | 13.814 h |
| May | 15.5°C9.3°C | 9.3°C | 53 | 9.5 | 15.616 h |
| June | 18.5°C12.2°C | 12.2°C | 55 | 9.8 | 16.617 h |
| July | 20.8°C14.4°C | 14.4°C | 56 | 11.0 | 16.116 h |
| August, selected | 20.8°C14.6°C | 14.6°C | 63 | 10.2 | 14.615 h |
| September | 18.1°C12.5°C | 12.5°C | 56 | 10.3 | 12.713 h |
| October | 14.4°C9.8°C | 9.8°C | 72 | 12.3 | 10.711 h |
| November | 10.3°C6.3°C | 6.3°C | 71 | 12.4 | 8.99 h |
| December | 7.7°C4.0°C | 4.0°C | 74 | 12.7 | 7.98 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Basildon in AugustUnited Kingdom · 18 kmHigh 20.9°C · Low 14.2°C · 58 mm rain
- Gillingham in AugustUnited Kingdom · 20 kmHigh 21.1°C · Low 14.0°C · 58 mm rain
- Chelmsford in AugustUnited Kingdom · 28 kmHigh 21.1°C · Low 13.9°C · 59 mm rain
- Grays in AugustUnited Kingdom · 28 kmHigh 21.3°C · Low 14.0°C · 60 mm rain
- Maidstone in AugustUnited Kingdom · 33 kmHigh 21.4°C · Low 14.1°C · 68 mm rain
- Dagenham in AugustUnited Kingdom · 38 kmHigh 21.3°C · Low 13.9°C · 60 mm rain
- Bexley in AugustUnited Kingdom · 41 kmHigh 21.3°C · Low 13.8°C · 60 mm rain
- Colchester in AugustUnited Kingdom · 41 kmHigh 20.7°C · Low 14.4°C · 64 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Southend-on-Sea) is explained once on the Southend-on-Sea year overview and on the Sources, method and limits page.