18.09
fri
fri
Day
64°F
NW 17 mph
Precip.
1%
1%
Night
55°F
NW 6 mph
Precip.
10%
10%
19.09
sat
sat
Day
68°F
NW 20 mph
Precip.
3%
3%
Night
61°F
NW 19 mph
Precip.
9%
9%
20.09
sun
sun
Day
73°F
N 5 mph
Precip.
2%
2%
Night
61°F
NW 11 mph
Precip.
15%
15%
21.09
mon
mon
Day
79°F
NW 3 mph
Precip.
2%
2%
Night
66°F
NW 3 mph
Precip.
17%
17%
22.09
tue
tue
Day
79°F
E 2 mph
Precip.
10%
10%
Night
70°F
NE 4 mph
Precip.
14%
14%
23.09
wed
wed
Day
64°F
SE 6 mph
Precip.
74%
74%
Night
59°F
SE 7 mph
Precip.
56%
56%
24.09
thu
thu
Day
64°F
SE 17 mph
Precip.
20%
20%
Night
57°F
S 6 mph
Precip.
28%
28%
sea water
temperature
temperature
| Capetown |
monthly
weather
weather
| Capetown |
current
weather
weather
| Capetown |
14 days
forecast
forecast
| Capetown |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 53.6°F. The highest and lowest sea temperatures during the month were 54.9°F and 51.6°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 56.4°F. The highest and lowest sea temperatures during the month were 58.8°F and 52.3°F.
Air temperature in Capetown, °F
Precipitation total in Capetown, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Capetown
Capetown on a weather map
Places in South Africa:
Name
°F
24 Hours Forecast
Capetown
Local time: 00:56
September 18, friday
0300
54°F
NW
14 mph
14 mph
0600
52°F
NW
9 mph
9 mph
0900
57°F
NW
12 mph
12 mph
1200
64°F
NW
17 mph
17 mph
1500
68°F
NW
22 mph
22 mph
1800
63°F
NW
17 mph
17 mph
2100
59°F
NW
9 mph
9 mph
September 19, saturday
0000
55°F
NW
6 mph
6 mph
