Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Semporna, Malaysia

The ideal sea water temperature of 29.1°C (84.4°F) make September the best time for swimming and other water activities in Semporna, Malaysia.

Sea temperature

In September, the average sea temperature is 29.1°C (84.4°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.


In Semporna, the average length of the day in September is 12.1h.

What is the sea water temperature in September in Semporna?

In Semporna, in September, the average water temperature is 29.1°C (84.4°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Semporna?

The average length of the day in September in Semporna, Malaysia, is 12.1h.
Average sea temperature in September - Semporna, Malaysia
  • Average sea temperature in September: 29.1°C

The best month for swimming (with the highest average sea temperature) is June (29.9°C).
The coldest month (with the lowest average sea temperature) is January (28.1°C).

Average daylight in September - Semporna, Malaysia
  • Average daylight in September: 12.1h

Months with the longest days are June and July (Average daylight: 12.4h).
Months with shortest days are January, November and December (Average daylight: 11.9h).