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Surabaya Weather by Month
Average temperatures, rainfall and humidity for Surabaya, Indonesia, month by month, built from OpenWeather's historical records. Use it to see what a typical Surabaya month looks like before you travel — then check the live Surabaya forecast for the days ahead.
Warmest month
October
34°C average high
Coolest month
August
23°C average low
Wettest month
March
142 mm of rain
Driest month
August
6 mm of rain
Average temperature and rainfall in Surabaya by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 31°C | 25°C | 23°C / 36°C | 102 mm | 83% | 12 km/h |
| February | 31°C | 25°C | 22°C / 36°C | 108 mm | 84% | 12 km/h |
| March | 32°C | 25°C | 2°C / 35°C | 142 mm | 84% | 10 km/h |
| April | 32°C | 25°C | 23°C / 35°C | 92 mm | 83% | 9 km/h |
| May | 32°C | 25°C | 22°C / 35°C | 29 mm | 79% | 10 km/h |
| June | 32°C | 25°C | 19°C / 35°C | 17 mm | 78% | 10 km/h |
| July | 31°C | 23°C | 19°C / 34°C | 8 mm | 74% | 11 km/h |
| August | 32°C | 23°C | 18°C / 37°C | 6 mm | 71% | 13 km/h |
| September | 33°C | 24°C | 19°C / 38°C | 9 mm | 69% | 12 km/h |
| October | 34°C | 25°C | 20°C / 40°C | 33 mm | 70% | 11 km/h |
| November | 33°C | 25°C | 22°C / 37°C | 71 mm | 75% | 10 km/h |
| December | 32°C | 25°C | 23°C / 36°C | 94 mm | 80% | 10 km/h |
Best time to visit Surabaya
The most comfortable time to visit Surabaya is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around March, totalling about 711 mm a year.
Travellers who prefer heat should aim for October, when highs average 34°C. March is the month to avoid if rain would spoil your plans — it averages 142 mm, roughly 22× the rainfall of August.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Surabaya forecast for what is happening now.