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Temperature in East Sussex in September

East Sussex is a region in the United Kingdom. September is generally a pleasant month with maximum daytime temperatures around 19°C and nighttime temperatures around 14°C in Brighton & Hove. In September, it is summer.

What is the temperature of the different cities in East Sussex in September?

Find the average daytime temperatures in September for the most popular destinations in East Sussex on the map below. Click on a destination dot for more detailed information.

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Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

Select a Month of Interest

Check the weather conditions for any month in East Sussex.

For a detailed overview of the weather over the year and the best time to visit the United Kingdom, check out our East Sussex's climate page.

  • What is the water's temperature in September?
  • The water temperature averages approximately 18°C in Brighton & Hove this month, so still a bit cool to swim but some enjoy a chilly dive.

    Interested in more climate information?

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