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South Africa weather

Weather in Western Cape for September 2027

Your guide to Western Cape weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Western Cape at the beginning of September is 17.4 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 20.1 °C by the end of September.

    • Rain 🌧️

  • Western Cape experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 51.8 mm.

    • More

  • Is September a good time to visit Western Cape? check out the best time to travel to Western Cape page.

  • ✨ Is September a good time to visit Western Cape? – Ask the AI Weatherman

Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/11°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
69 %
Avg humidity

Western Cape Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
18°
2
Patchy rain possible
19°
3
Patchy rain possible
17°
4
Light rain
17°
5
Light rain
16°
6
Sunny
17°
7
Sunny
19°
8
Partly cloudy
20°
9
Sunny
21°
10
Light rain
19°
11
Light rain
18°
12
Patchy rain possible
17°
13
Patchy rain possible
20°
14
Patchy rain possible
18°
15
Light rain
17°
16
Light rain
16°
17
Partly cloudy
17°
18
Partly cloudy
18°
19
Patchy rain possible
18°
20
Sunny
20°
21
Sunny
21°
22
Patchy rain possible
22°
23
Patchy rain possible
19°
24
Light rain
19°
25
Light rain
20°
26
Patchy rain possible
20°
27
Sunny
20°
28
Patchy rain possible
20°
29
Patchy rain possible
21°
30
Light rain
22°

What’s the Weather Like in Western Cape This September?

Discover the average temperatures and weather trends across Western Cape’s cities this September.
Patchy rain possibleCape Town19 °C / 11 °CSunnyStellenbosch20 °C / 9 °CSunnyCeres20 °C / 8 °CSunnyWorcester20 °C / 8 °CPatchy rain possibleMossel Bay17 °C / 13 °CPatchy rain possibleHermanus17 °C / 12 °CSunnyMalmesbury21 °C / 9 °CSunnyWellington21 °C / 9 °CPatchy rain possibleKnysna19 °C / 12 °CSunnyCape Winelands22 °C / 10 °CSunnyTable Mountain21 °C / 12 °CCloudyOudtshoorn22 °C / 11 °CMore Locations

Temperatures trend during September in Western Cape

See the weather trend as well as the moving average line

September weather in Western Cape day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
 18° /10° 0.1 mm 5
2 Sept. Patchy rain possible
Patchy rain possible
 19° /11° 1.4 mm 5
3 Sept. Patchy rain possible
Patchy rain possible
 17° /10° 1.3 mm 5
4 Sept. Light rain
Light rain
 17° /10° 2.6 mm 5
5 Sept. Light rain
Light rain
 16° /10° 5.1 mm 4
6 Sept. Sunny
Sunny
 17° /10° 0 mm 5
7 Sept. Sunny
Sunny
 19° /10° 0 mm 6
8 Sept. Partly cloudy
Partly cloudy
 20° /11° 0.1 mm 5
9 Sept. Sunny
Sunny
 21° /11° 0.1 mm 6
10 Sept. Light rain
Light rain
 19° /11° 3.7 mm 5
11 Sept. Light rain
Light rain
 18° /11° 3.4 mm 5
12 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 1.3 mm 5
13 Sept. Patchy rain possible
Patchy rain possible
 20° /10° 1.1 mm 5
14 Sept. Patchy rain possible
Patchy rain possible
 18° /11° 1.3 mm 5
15 Sept. Light rain
Light rain
 17° /11° 2.5 mm 4
16 Sept. Light rain
Light rain
 16° /11° 2.7 mm 5
17 Sept. Partly cloudy
Partly cloudy
 17° /10° 0 mm 6
18 Sept. Partly cloudy
Partly cloudy
 18° /10° 0.6 mm 5
19 Sept. Patchy rain possible
Patchy rain possible
 18° /10° 0.5 mm 5
20 Sept. Sunny
Sunny
 20° /11° 0.3 mm 6
21 Sept. Sunny
Sunny
 21° /11° 0.7 mm 6
22 Sept. Patchy rain possible
Patchy rain possible
 22° /12° 0.9 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 19° /13° 0.2 mm 5
24 Sept. Light rain
Light rain
 19° /12° 7.3 mm 5
25 Sept. Light rain
Light rain
 20° /12° 8.7 mm 5
26 Sept. Patchy rain possible
Patchy rain possible
 20° /12° 0.4 mm 5
27 Sept. Sunny
Sunny
 20° /12° 0 mm 6
28 Sept. Patchy rain possible
Patchy rain possible
 20° /11° 1.5 mm 6
29 Sept. Patchy rain possible
Patchy rain possible
 21° /12° 1.1 mm 6
30 Sept. Light rain
Light rain
 22° /12° 3 mm 6
Next
Important Notice
Our weather forecast for Western Cape 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 Western Cape forecast closer to your planned date for the most up-to-date weather information.
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Western Cape in September - FAQ

What are the expected maximum and minimum temperatures in Western Cape during September?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Western Cape during September?
Moderate rainfall is anticipated in Western Cape during September, with a total of 51.8 mm spread over approximately 6 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Western Cape during September?
The average wind speed in Western Cape during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

Western Cape water temperatures in September

The average water temperature of the Atlantic Ocean near Western Cape in September is 12.7 °C. At the beginning of September temperatures are around 12.7 °C; by the end of the month they stay fairly steady and reach 12.7 °C.

What is the water temperature in Western Cape in September?
The average water temperature in Western Cape in September is 12.7 °C.
Can you swim in Western Cape 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 Western Cape

Explore the daily rainfall trends and prepare for Western Capes September weather 💧
Typically, Western Cape has 6 rainy days in September with a total of 51.8 mm of rainfall.

UV exposure in Western Cape during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Provinces in Western Cape
Select a province for an accurate weather forecast
Cape Winelands District MunicipalityCity of Cape TownEden District MunicipalityOverberg District MunicipalityWest Coast District Municipality
Top locations in Western Cape
Select a location for an accurate weather forecast
Cape TownCape WinelandsCeresHermanusKnysnaMalmesburyMossel BayStellenboschWellingtonWorcester
More Locations
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