South Africa Cape Town Weather in September — Climate Guide
September in Cape Town is high
September is high for Cape Town.
Spring begins. Wildflowers up the West Coast, Korean Chuseok shoulder week.
Travel score
Cape Town September Weather Stats
Avg High
20°C
Avg Low
10°C
Rainy Days
7
50mm total
Sunshine
8h
Daily avg
Humidity
70%
moderate
UV Index
6
High
Wind
18 km/h
Gusts 35
Sea Temp
15°C
cold for swimming
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
15 μg/m³
PM10
28 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
20°C
Nighttime
10°C
Humidity and wind affect how the actual temperature feels.
Wind
18 km/h
Max gust 35 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Daytime 10-20°C
- Wildflower season
- Korean Chuseok travel window
Cons
- Wind picking up
September Events & Festivals
- Spring begins
- Korean Chuseok shoulder
- Wildflower season starts in Namaqualand
Cape Town in September — Full Picture
Spring begins. Wildflowers up the West Coast, Korean Chuseok shoulder week.
What to Wear & What to Pack
Layers; light jacket.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
23°C
12°C
6.3/mo
Summer (Jun·Jul·Aug)
17.7°C
7.7°C
8.7/mo
Autumn (Sep·Oct·Nov)
Current22°C
12°C
5.7/mo
Winter (Dec·Jan·Feb)
26.7°C
15.7°C
3.7/mo
Cape Town Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 27° | 16° | 4d·15mm | 11h | 65% | 11 | Very busy | Peak |
| February (Best) | 27° | 16° | 4d·20mm | 11h | 65% | 11 | Very busy | Peak |
| March (Best) | 26° | 14° | 5d·25mm | 10h | 70% | 10 | Very busy | Peak |
| April (Best) | 23° | 12° | 6d·50mm | 8h | 73% | 7 | Busy | Shoulder |
| 20° | 10° | 8d·100mm | 6h | 78% | 5 | Moderate | Shoulder | |
| 18° | 8° | 9d·110mm | 6h | 80% | 3 | Quiet | Low season | |
| 17° | 7° | 9d·90mm | 6h | 80% | 3 | Quiet | Low season | |
| 18° | 8° | 8d·80mm | 7h | 75% | 4 | Moderate | Low season | |
| 20° | 10° | 7d·50mm | 8h | 70% | 6 | Busy | Shoulder | |
| October (Best) | 22° | 12° | 6d·35mm | 10h | 70% | 9 | Busy | Shoulder |
| November (Best) | 24° | 14° | 4d·20mm | 11h | 65% | 10 | Very busy | Peak |
| December (Best) | 26° | 15° | 3d·15mm | 11h | 65% | 11 | Very busy | Peak |
View Other Months
Cape Town September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Cape Town?
Cape Town in September is high. Tourist crowds are busy and flight/hotel prices are shoulder.
What's the average temperature in Cape Town in September?
Cape Town September averages a high of 20°C and a low of 10°C.
Does it rain much in Cape Town in September?
Cape Town September averages 50mm of rainfall over about 7 rainy days.
What should I wear in Cape Town in September?
Layers; light jacket.
What time are sunrise and sunset in Cape Town in September?
Cape Town September sunrise is 06:45 and sunset is 18:30, with 11h 45min of daylight.
What's the air quality like in Cape Town in September?
Cape Town September air quality (AQI) averages 40, rated Good. PM2.5 averages 15μg/m³.
What activities are recommended in Cape Town in September?
In September, Cape Town is great for Table Mountain, Cape Point, Stellenbosch winelands.
Is September peak season in Cape Town?
Cape Town September crowds are busy and prices are shoulder. Advance reservations are strongly recommended.
Best Months to Visit Cape Town
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.