Weather in September
September signals the beginning of a soothing transition from summer to autumn. The sea temperature experiences the year's second highest recording at 29.7°C (85.5°F), still providing a warm retreat for marine adventure seekers. The daylight hours commensurately decline, indicating the gradual approach of shorter autumn days. Meanwhile,
October follows the descending weather trend set by September.
Sea temperature
The month with the warmest seawater is September, with an average sea temperature of 29.7°C (85.5°F).
Note: Swimming, diving, and other water-related activities in temperatures between 25°C (77°F) and 29°C (84.2°F) are considered highly enjoyable and satisfying for longer durations without uneasiness.
Daylight
In
Biabou, the average length of the day in September is 12h and 12min.
On the first day of September, sunrise is at 05:53 and sunset at 18:15. On the last day of the month, sunrise is at 05:53 and sunset at 17:54 AST.