Weather in September
Sea temperature
In Saint Helena Bay, South Africa, in September, the average water temperature is 14.9°C (58.8°F).Note: To swim in 14.9°C (58.8°F) at less than 10°C (50°F), ensure you're well-protected. Without it, be prepared for a sudden jolt of cold and breathing issues. Remember, even 13°C (55.4°F) is not welcoming.
Daylight
In September, the average length of the day in Saint Helena Bay is 11h and 54min.On the first day of the month, sunrise is at 07:04 and sunset at 18:31. On the last day of September, sunrise is at 06:25 and sunset at 18:49 SAST.
Frequently asked questions
How cold is the water in September in Saint Helena Bay?
In September, the average sea temperature is 14.9°C (58.8°F). Swimming in 14.9°C (58.8°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.
What is the average length of the day in September in Saint Helena Bay?
In September, the average day length in Saint Helena Bay, South Africa, is 11h and 54min.
When is the sunrise / sunset in September in Saint Helena Bay?
On the first day of September in Saint Helena Bay, sunrise is at 07:04 and sunset at 18:31. On the last day of the month, sunrise is at 06:25 and sunset at 18:49 SAST.
Average sea temperature in September
Saint Helena Bay, South Africa
- Average sea temperature in September: 14.9°C
The best months for swimming (with the highest average sea temperature) are January and March (17.3°C).
The coldest month (with the lowest average sea temperature) is July (14.4°C).
Average daylight in September
Saint Helena Bay, South Africa
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 14h and 18min).
The month with the shortest days is June (Average daylight: 10h and 0min).
Saint Helena Bay, South Africa
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