Click on a day for an hourly weather forecast
The weather in Surabaya in September is very hot. The average temperatures are between 26°C and 33°C, drinking water regularly is advisable.
You can expect a few rainy days in Surabaya during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Surabaya in September 2025.
If you’re planning to visit Surabaya in the near future, we highly recommend that you review the 14 day weather forecast for Surabaya before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 31° / 26° | 19 | 12 | 0 | 365 mm | Ok | Surabaya in January |
| February | 31° / 25° | 17 | 11 | 0 | 359 mm | Ok | Surabaya in February |
| March | 31° / 26° | 17 | 14 | 0 | 320 mm | Ok | Surabaya in March |
| April | 31° / 26° | 10 | 20 | 0 | 180 mm | Ok | Surabaya in April |
| May | 32° / 26° | 5 | 26 | 0 | 109 mm | Good | Surabaya in May |
| June | 31° / 26° | 2 | 28 | 0 | 50 mm | Good | Surabaya in June |
| July | 31° / 25° | 2 | 29 | 0 | 35 mm | Good | Surabaya in July |
| August | 32° / 25° | 1 | 30 | 0 | 14 mm | Good | Surabaya in August |
| September | 33° / 26° | 1 | 29 | 0 | 23 mm | Good | Surabaya in September |
| October | 33° / 27° | 2 | 29 | 0 | 53 mm | Good | Surabaya in October |
| November | 33° / 27° | 6 | 24 | 0 | 130 mm | Good | Surabaya in November |
| December | 32° / 26° | 15 | 16 | 0 | 256 mm | Ok | Surabaya in December |