Weather in Cape Town for September 2025
So far, September 2025 in Cape Town shows a warmer trend than usual by 2.2 °C.
The forecast for the next days in Cape Town predicts temperatures to be around 17 °C, close to the historical average.
In general, the average temperature in Cape Town at the beginning of September is 17.3 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 19 °C by the end of September.
The climate of Cape Town in September is notably wet, with an average of 12 rainy days, and a total of 63.5 mm of precipitation.
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Cape Town Weather September
Temperatures trend during September in Cape Town
September weather in Cape Town day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 18° /9° | 0.1 mm | 5 | |
| 2 Sept. |  Sunny | 20° /10° | 1.7 mm | 6 | |
| 3 Sept. |  Patchy rain possible | 17° /10° | 1.2 mm | 5 | |
| 4 Sept. |  Partly cloudy | 17° /9° | 3.1 mm | 5 | |
| 5 Sept. | Patchy rain possible | 15° /10° | 6.1 mm | 4 | |
| 6 Sept. | Patchy rain possible | 16° /9° | 0 mm | 5 | |
| 7 Sept. | Sunny | 18° /8° | 0 mm | 6 | |
| 8 Sept. | Partly cloudy | 19° /9° | 0.1 mm | 5 | |
| 9 Sept. | Sunny | 22° /10° | 0.1 mm | 6 | |
| 10 Sept. | Sunny | 19° /10° | 4.4 mm | 6 | |
| 11 Sept. | Sunny | 18° /9° | 4.1 mm | 5 | |
| 12 Sept. | Sunny | 17° /9° | 0.4 mm | 5 | |
| 13 Sept. | Sunny | 19° /9° | 0 mm | 6 | |
| 14 Sept. | Overcast | 19° /10° | 0 mm | 5 | |
| 15 Sept. | Patchy rain possible | 16° /13° | 2.1 mm | 1.4 | |
| 16 Sept. | Patchy rain possible | 15° /12° | 2.3 mm | 1.3 | |
| 17 Sept. | Patchy rain possible | 14° /11° | 0.2 mm | 1.3 | |
| 18 Sept. | Patchy rain possible | 15° /11° | 0.2 mm | 1.5 | |
| 19 Sept. | Overcast | 19° /11° | 0 mm | 1.9 | |
| 20 Sept. | Partly cloudy | 18° /14° | 0.1 mm | 6 | |
| 21 Sept. | Patchy rain possible | 17° /14° | 0.1 mm | 4 | |
| 22 Sept. | Patchy rain possible | 16° /13° | 0.2 mm | 4 | |
| 23 Sept. | Partly cloudy | 16° /12° | 0.1 mm | 5 | |
| 24 Sept. | Patchy rain possible | 17° /14° | 0.2 mm | 4 | |
| 25 Sept. | Patchy rain possible | 19° /13° | 0.1 mm | 5 | |
| 26 Sept. | Sunny | 20° /15° | 0 mm | 6 | |
| 27 Sept. | Sunny | 20° /14° | 0 mm | 6 | |
| 28 Sept. | Sunny | 20° /14° | 0 mm | 6 | |
| 29 Sept. | Sunny | 19° /12° | 1.6 mm | 6 | |
| 30 Sept. | Light rain shower | 18° /11° | 4.5 mm | 5 | |
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Cape Town in September - FAQ
Cape Town water temperatures in September
The average water temperature of the Atlantic Ocean near Cape Town in September is 12.6 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in Cape Town in September?
- The average water temperature in Cape Town in September is 12.6 °C.
- Can you swim in Cape Town 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 Cape Town
UV exposure in Cape Town during September
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