Southend weather in September 2025

Q: How hot is it in Southend in September?

Daytime temperatures usually reach 19°C in Southend in September, falling to 11°C at night.

Q: How sunny is it in Southend in September?

There are normally 5 hours of bright sunshine each day in Southend in September - that's 40% of daylight hours.

Q: How warm is the sea around Southend in September?

The average sea temperature around Southend in September is 17°C.

Q: Does it rain in Southend in September?

There are usually 11 days with some rain in Southend in September and the average monthly rainfall is 49mm.

Expect daytime maximum temperatures of 19°C in Southend, England in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 11 days with some rainfall and typically 49 mm of rainfall in the month.

19
19°C max day temperature
5
5 hours of sunshine per day
11
11 days with some rainfall
11
11°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
49
49 mm of monthly rainfall
4
4 (Moderate) UV index
17
17°C sea temperature

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The September weather guide for England (Southend) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)