Surabaya Weather in May
What's the weather like in Surabaya (East Java) in May 2025?
The climate in Surabaya during May can be summarized as very hot, humid and wet.
May is in the fall / autumn in Surabaya and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (89°F), whilst at night 25°C (77°F) is normal.
| Daytime temperature | 31.9°C 89.3°F |
|---|---|
| Nightly temperature | 24.8°C 76.6°F |
| Average temperature | 28.3°C 82.9°F |
| Daily sunshine | 9.5 hrs |
| Avg rainfall | 122 mm 4.8 ins |
| Rainy days | 7 days |
| Sea temperature | 29.2°C 84.5°F |
| Humidity | 79% |
| Windspeed | 10.1kph 6 mph |
On average May is the 6th wettest month of the year in Surabaya with around 122mm 4.8 inches of rain making it a wet time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.5 hours of sunshine per day.
May temperatures in Surabaya
May rainfall
May hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Surabaya in May 2025.
Other monthly averages
Surabaya weather stats
| Hottest month: | October | 33.3°C 91.9°F |
|---|---|---|
| Driest month: | August | 13mm 0.5ins |
| Sunniest month: | August | 11.7hrs |
| Coldest month: | July | 31.1°C 88°F |
| Wettest month: | January | 281mm 11.1ins |
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