Southend-on-Sea weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Good
Best time to visit: May – September
What is the weather like in Southend-on-Sea in August?
In August, Southend-on-Sea is mild: daytime highs average 21 °C, and nights cool down to about 15 °C. The sea averages 18.6 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 65 mm in total. All in all, August is a good month for a holiday in Southend-on-Sea.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 79 | 79 | 76 |
| Day | 21° | 21° | 18° |
| Night | 14° | 15° | 13° |
| Sea | 18° | 19° | 17° |
| Sun | 8 h | 7 h | 6 h |
| Rain days | 11 | 11 | 10 |
More details for August
- Daylight
- 14 h 41 min05:41 – 20:23
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 22 km/haverage daily peakAll months
- Cloud cover
- 62 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+1Europe/London
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %67 %
- Few rainy daysweight 30 %54 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Wetsuit for longer swims
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Southend-on-Sea in August: quick answers
Is Southend-on-Sea hot in August?
No. In August, Southend-on-Sea is mild: daytime highs average 21 °C and nights drop to about 15 °C.
Can you swim in Southend-on-Sea in August?
Only if you don't mind cold water: in August the sea averages just 18.6 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Southend-on-Sea in August?
Rain is frequent, with about 11 rainy days and 65 mm in total.
Southend-on-Sea month by month
The whole year in Southend-on-SeaAll destinations: United KingdomWhere to go in AugustSea temperature in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences