City of Cape Town (Cape Town)
September
Weather in City of Cape Town for September 2026
Your guide to City of Cape Town weather in September - trends and predictions
So far, September 2026 in City of Cape Town is slightly warmer than the historical average by 1.9 °C.
The forecast for the next days in City of Cape Town predicts temperatures to be around 19 °C, close to the historical average.
In general, the average temperature in City of Cape Town at the beginning of September is 17.7 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 18.9 °C by the end of September.
With an average of 5 rainy days, City of Cape Town experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
25
Dry days
5
Rainy days
0
Snow days
18°/10°
Temperatures
20 km/h
Avg max wind
68 %
Avg humidity
City of Cape Town Weather September
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Temperatures trend during September in City of Cape Town
See the weather trend as well as the moving average line
September weather in City of Cape Town day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 18° /9° | 0.1 mm | 5 | |
| 2 Sept. |  Sunny | 19° /10° | 1.4 mm | 5 | |
| 3 Sept. |  Patchy rain possible | 17° /10° | 1.3 mm | 5 | |
| 4 Sept. |  Partly cloudy | 17° /10° | 2.6 mm | 5 | |
| 5 Sept. | Patchy rain possible | 16° /10° | 5.1 mm | 4 | |
| 6 Sept. | Sunny | 17° /9° | 0 mm | 5 | |
| 7 Sept. | Sunny | 20° /10° | 0 mm | 6 | |
| 8 Sept. | Partly cloudy | 21° /11° | 0.1 mm | 5 | |
| 9 Sept. | Sunny | 21° /11° | 0.1 mm | 6 | |
| 10 Sept. | Sunny | 19° /10° | 3.7 mm | 5 | |
| 11 Sept. | Sunny | 18° /10° | 3.4 mm | 5 | |
| 12 Sept. | Overcast | 18° /15° | 0.8 mm | 2.2 | |
| 13 Sept. |  Thundery outbreaks possible | 20° /15° | 4 mm | 5.3 | |
| 14 Sept. | Patchy rain possible | 20° /15° | 5.1 mm | 3.4 | |
| 15 Sept. | Patchy rain possible | 18° /14° | 4.4 mm | 7 | |
| 16 Sept. | Light rain shower | 14° /13° | 21.7 mm | 5 | |
| 17 Sept. | Sunny | 17° /12° | 0 mm | 6 | |
| 18 Sept. | Sunny | 17° /13° | 0 mm | 6 | |
| 19 Sept. | Sunny | 18° /13° | 0 mm | 6 | |
| 20 Sept. | Sunny | 22° /12° | 0 mm | 7 | |
| 21 Sept. | Sunny | 26° /15° | 0 mm | 8 | |
| 22 Sept. | Overcast | 23° /15° | 0.1 mm | 6 | |
| 23 Sept. | Patchy rain possible | 16° /13° | 0.7 mm | 6 | |
| 24 Sept. | Patchy rain possible | 15° /12° | 2.2 mm | 5 | |
| 25 Sept. | Sunny | 16° /12° | 0.1 mm | 6 | |
| 26 Sept. | Partly cloudy | 20° /11° | 0.3 mm | 6 | |
| 27 Sept. | Sunny | 20° /11° | 0 mm | 6 | |
| 28 Sept. | Sunny | 20° /11° | 1.8 mm | 6 | |
| 29 Sept. | Sunny | 20° /12° | 1.3 mm | 6 | |
| 30 Sept. | Light rain shower | 21° /11° | 3.6 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for City of Cape Town in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the City of Cape Town forecast closer to your planned date for the most up-to-date weather information.
Change Month
City of Cape Town in September - FAQ
What are the expected maximum and minimum temperatures in City of Cape Town during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in City of Cape Town during September?
Moderate rainfall is anticipated in City of Cape Town during September, with a total of 52.3 mm spread over approximately 5 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in City of Cape Town during September?
The average wind speed in City of Cape Town during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
City of Cape Town water temperatures in September
The average water temperature of the Atlantic Ocean near City of Cape Town in September is 12.6 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in City of Cape Town in September?
- The average water temperature in City of Cape Town in September is 12.6 °C.
- Can you swim in City of 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 City of Cape Town
Explore the daily rainfall trends and prepare for City of Cape Towns September weather 💧
Typically, City of Cape Town has 5 rainy days in September with a total of 52.3 mm of rainfall.
UV exposure in City of Cape Town during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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