Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Butterworth, Malaysia

An excellent water temperature of 29.5°C (85.1°F) makes Septiembre in Butterworth, Malaysia, a prime for swimming and other water activities.

Sea temperature

In Butterworth, in Septiembre, the average water temperature is 29.5°C (85.1°F).
Note: 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.


In Septiembre, the average length of the day is 12.2h.

What is the water temperature in Septiembre in Butterworth?

In Butterworth, the average seawater temperature in Septiembre is 29.5°C (85.1°F). 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.

What is the average length of the day in Septiembre in Butterworth?

The average length of the day in Septiembre in Butterworth is 12.2h.
Average sea temperature in September - Butterworth, Malaysia
  • Average sea temperature in September: 29.5°C

The best month for swimming (with the highest average sea temperature) is May (30.5°C).
The coldest month (with the lowest average sea temperature) is January (28.7°C).

Average daylight in September - Butterworth, Malaysia
  • Average daylight in September: 12.2h

Months with the longest days are May, June and July (Average daylight: 12.4h).
Months with shortest days are January and December (Average daylight: 11.8h).