Weather in Brighton for September 2025
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Until now, September 2025 in Brighton is slightly cooler than the historical average by -1.6 °C.
Expect cooler weather in the next days in Brighton with the forecast suggesting a temperature of 15.9 °C, lower than the historical average.
In general, the average temperature in Brighton at the beginning of September is 20.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.1 °C by the end of September.
Brighton in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 109.6 mm.
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Brighton Weather September
Temperatures trend during September in Brighton
September weather in Brighton day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 20° /16° | 8.6 mm | 4 | |
| 2 Sept. | Patchy rain possible | 19° /16° | 2.9 mm | 4 | |
| 3 Sept. |  Sunny | 20° /15° | 2.6 mm | 5 | |
| 4 Sept. | Light rain shower | 20° /15° | 3.8 mm | 5 | |
| 5 Sept. | Sunny | 20° /14° | 8.7 mm | 5 | |
| 6 Sept. |  Cloudy | 21° /16° | 4.4 mm | 5 | |
| 7 Sept. | Sunny | 22° /17° | 0.6 mm | 5 | |
| 8 Sept. | Sunny | 19° /16° | 2.2 mm | 5 | |
| 9 Sept. | Sunny | 20° /15° | 0.1 mm | 5 | |
| 10 Sept. | Light rain shower | 20° /15° | 2.8 mm | 5 | |
| 11 Sept. | Sunny | 17° /13° | 1.9 mm | 4 | |
| 12 Sept. | Light rain shower | 17° /12° | 2.4 mm | 4 | |
| 13 Sept. |  Overcast | 17° /12° | 4.5 mm | 4 | |
| 14 Sept. |  Partly cloudy | 17° /12° | 0.9 mm | 4 | |
| 15 Sept. | Patchy rain possible | 16° /15° | 2.2 mm | 1 | |
| 16 Sept. | Patchy rain possible | 17° /14° | 0.7 mm | 0.7 | |
| 17 Sept. | Patchy rain possible | 17° /13° | 3.2 mm | 0.3 | |
| 18 Sept. | Patchy rain possible | 19° /17° | 0.2 mm | 0.8 | |
| 19 Sept. | Partly cloudy | 19° /17° | 0 mm | 0.9 | |
| 20 Sept. | Patchy rain possible | 18° /17° | 1.4 mm | 4 | |
| 21 Sept. | Patchy rain possible | 13° /11° | 0.2 mm | 3 | |
| 22 Sept. | Patchy rain possible | 15° /9° | 0.2 mm | 3 | |
| 23 Sept. | Patchy rain possible | 16° /12° | 0.8 mm | 3 | |
| 24 Sept. |  Moderate rain | 14° /13° | 9.7 mm | 3 | |
| 25 Sept. | Patchy rain possible | 14° /12° | 1.9 mm | 3 | |
| 26 Sept. | Patchy rain possible | 15° /12° | 0.6 mm | 3 | |
| 27 Sept. | Patchy rain possible | 15° /11° | 0.1 mm | 3 | |
| 28 Sept. | Sunny | 15° /10° | 0.1 mm | 4 | |
| 29 Sept. | Light rain shower | 16° /11° | 1.5 mm | 4 | |
| 30 Sept. | Cloudy | 17° /12° | 5.9 mm | 4 | |
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Brighton in September - FAQ
Brighton water temperatures in September
The average water temperature of the Atlantic Ocean near Brighton in September is 13.8 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in Brighton in September?
- The average water temperature in Brighton in September is 13.8 °C.
- Can you swim in Brighton in September?
- Cold enough that you lose heat fast. A full 4–5 mm wetsuit (plus hood/gloves for comfort) is advisable for anything beyond a brief plunge.
September rainfall patterns in Brighton
UV exposure in Brighton during September
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