Harwich weather in September 2025

Expect 19°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Harwich in September. Check more long-term weather averages for Harwich in September before you book your next holiday to England in 2025/2026.

19
19°C max day temperature
5
5 hours of sunshine per day
15
15 days with some rainfall
10
10°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
48
48 mm of monthly rainfall
4
4 (Moderate) UV index
17
17°C sea temperature

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The September weather guide for England (Harwich) 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)

More about England

How hot is it in Harwich in September?

Daytime temperatures usually reach 19°C in Harwich in September, falling to 10°C at night.

How sunny is it in Harwich in September?

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

How warm is the sea around Harwich in September?

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

Does it rain in Harwich in September?

There are usually 15 days with some rain in Harwich in September and the average monthly rainfall is 48mm.

Harwich September sunrise & sunset times

Browse the sunrise and sunset times for Harwich in September 2025. Select a month to view Harwich sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Monday, 1st September 2025	05:07	18:42
Monday, 15th September 2025	05:30	18:09
Tuesday, 30th September 2025	05:54	17:34

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