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Cape Town Weather in September — Climate Guide

September in Cape Town is high

Avg High
20°C
Avg Low
10°C
Rainy Days
7
Sunshine
8h

September is high for Cape Town.

Spring begins. Wildflowers up the West Coast, Korean Chuseok shoulder week.

Crowds: Busy Prices: Shoulder Sea temp: 15°C
8 /10

Travel score

Cape Town September Weather Stats

Avg High

20°C

-10°
40°
Temperature range

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

Sunrise
06:45
Day length
11h 45min
Sunset
18:30
00:0006:0012:0018:0024:00

Air Quality

40
AQI
Good
GoodModeratePoorVery poor

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

Table Mountain Cape Point Stellenbosch winelands Namaqualand wildflowers

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

Light layers
Light jacket
Comfortable walking shoes

Seasonal Weather Overview

Spring (Mar·Apr·May)

Avg High

23°C

Avg Low

12°C

Rainy days

6.3/mo

Busy Shoulder

Summer (Jun·Jul·Aug)

Avg High

17.7°C

Avg Low

7.7°C

Rainy days

8.7/mo

Quiet Low season

Autumn (Sep·Oct·Nov)

Current
Avg High

22°C

Avg Low

12°C

Rainy days

5.7/mo

Busy Shoulder

Winter (Dec·Jan·Feb)

Avg High

26.7°C

Avg Low

15.7°C

Rainy days

3.7/mo

Very busy Peak

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° 9d·110mm 6h 80% 3 Quiet Low season
17° 9d·90mm 6h 80% 3 Quiet Low season
18° 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

Jimmy Kong TripPick founder · Travel content creator

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.

8+ years analyzing travel data 30+ countries visited Live exchange rate verified
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