Weather in Surabaya
Live weather and 7-day forecast for Surabaya, Indonesia, followed by what to expect in each month of the year.
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Forecast data from Open-Meteo
Climate in Surabaya: month by month
Averaged over 2023–2025, the warmest month in Surabaya is October, with highs around 34 °C (92 °F) and lows around 25 °C (77 °F); the coolest is July, with highs around 31 °C (88 °F) and lows around 23 °C (74 °F). Temperatures barely change through the year — the monthly averages stay within 2 °C of each other.
Surabaya gets about 1,893 mm (75 in) of precipitation a year. The wettest month is February (342 mm over about 28 days) and the driest is September (12 mm).
| Month | Avg high | Avg low | Precipitation (mm) | Wet days | Daylight |
|---|---|---|---|---|---|
| January | 31° | 25° | 323 | 30 | 12h 30m |
| February | 31° | 25° | 342 | 28 | 12h 20m |
| March | 31° | 25° | 259 | 25 | 12h 9m |
| April | 31° | 25° | 197 | 25 | 11h 57m |
| May | 31° | 25° | 119 | 11 | 11h 47m |
| June | 31° | 25° | 36 | 8 | 11h 42m |
| July | 31° | 23° | 16 | 4 | 11h 44m |
| August | 32° | 23° | 13 | 2 | 11h 52m |
| September | 33° | 24° | 12 | 4 | 12h 3m |
| October | 34° | 25° | 55 | 8 | 12h 15m |
| November | 33° | 25° | 234 | 21 | 12h 26m |
| December | 32° | 25° | 287 | 27 | 12h 32m |
Averages of daily values from the ERA5 reanalysis for 2023–2025 at Surabaya's coordinates (model elevation 8 m), via Open-Meteo (CC BY 4.0). Three recent years are not a 30-year climate normal; reanalysis smooths local extremes and tends to count more light-rain days than a rain gauge would. Daylight is sunrise to sunset on the 15th of each month.
Weather questions for Surabaya
What is the hottest month in Surabaya?
October, with average highs of 34 °C (92 °F) and lows of 25 °C (77 °F) over 2023–2025. The coolest month is July, averaging 31 °C (88 °F) by day and 23 °C (74 °F) at night.
What is the rainiest month in Surabaya?
February, with about 342 mm of precipitation on roughly 28 days. The driest month is September (12 mm), and the yearly total is around 1,893 mm.
When is the weather mildest in Surabaya?
No month in Surabaya has average highs between 18 °C and 27 °C (64–81 °F). The coolest month, July, averages highs of 31 °C (88 °F).
More about Surabaya
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About this forecast
The live forecast comes from Open-Meteo, which blends models from national weather services and is fetched fresh in your browser on each visit. Times in the hourly outlook are Surabaya local time (Asia/Jakarta).