Weather in Southend in September 2025
Average weather
Average temperature in Southend in September
Going from a maximum of +31°C during the day to a minimum of +9°C during the night, the temperature in September averages around +23°C.
The average maximum temperature goes down 18% by the end of the month, compared with the beginning of the month, from +23°C to +19°C.
Is Southend warm or cold in September?
Southend is typically mild in September.
Maximum temperatures go down compared to the previous month from +21°C to +19°C. The minimum temperature also goes down from +14°C to +12°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
September is one of the warmest months in Southend, here is the comparison with other months:
Water temperature in Southend in September
Water in Southend in September is Fresh. It varies from +16°C to +19°C, with an average of +17°C. This is almost similar to the air temperature, which averages +19°C.
The water temperature in September is one of the warmest of the entire year:
Can you swim in Southend in September?
Climate in Southend in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +21°C | +19°C | +15°C | ||||
| Min. temperature | ||||||
| +6°C | +2°C | -4°C | ||||
| Max. temperature | ||||||
| +35°C | +31°C | +28°C | ||||
| Rainfall | ||||||
| 54 mm | 42 mm | 60 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 4 m/s | ||||
| Avg. water temperature | ||||||
| +17°C | +17°C | +16°C | ||||
| Humidity | ||||||
| 73% | 76% | 80% | ||||
| Air pressure | ||||||
| 1014 HPa | 1015 HPa | 1013 HPa | ||||
| Sunny days | ||||||
| 8 | 7 | 6 | ||||
| Cloudy days | ||||||
| 7 | 8 | 9 | ||||
| Rainy days | ||||||
| 15 | 14 | 16 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September typically has worse weather conditions compared to August. It’s getting colder in September. From +21°C in the day, the average maximum temperature lowers to +19°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 54 mm to 42 mm. Humidity rises from 73% to 76%. The average wind speed doesn’t change much during September, staying around 4 m/s. The days becoming less sunny, going from 8 sunny days in August to 7 in September.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 11 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Southend is gradually increasing during September, going from 1 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in Southend?
Climate Change over Years
The climate in Southend in September has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+12°C) and the highest in 2022 (+16°C). The driest year was 1996 with only 411 mm of rainfall, and the wettest year was 2023 with 1025 mm.
FAQ
Is September a good time to visit Southend?
Can you sunbathe in Southend in September?
Can you swim in Southend in September?
Is Southend rainy in September?
Is it sunny in Southend in September?
Other cities in United Kingdom
Monthly weather in Southend
Source of the data
For this page, we’ve looked at the typical weather in Southend, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.