Surabaya weather in August
In August, Surabaya has an average high of 32 °C90 °F and an average low of 24 °C76 °F, with about 11 mm0.4 in of precipitation. It is the 4th warmest month of the year and the driest.
How August compares with other months
Compared with July, August is 0.6 °C1.1 °F warmer on average and drier by 24 mm1.0 in. Compared with September, August is 1.1 °C2 °F cooler on average and drier by 8 mm0.3 in. Daylight lasts about 11.9 hours around the middle of the month. Average relative humidity is 65% and the average cloud amount 39%.
Is August a good time to visit Surabaya?
Yes — August is one of the most comfortable months to visit Surabaya by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in August
For Surabaya in August, pack very light, breathable clothing, a sun hat and plenty of water.
August in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Surabaya | 3290 | 2476 | 110.4 |
| Mojokerto | 3493 | 2272 | 110.4 |
| Pasuruan | 3188 | 2475 | 90.4 |
| Probolinggo | 3188 | 2271 | 140.5 |
| Malang | 2984 | 1966 | 140.5 |
| Kediri | 3086 | 2170 | 180.7 |
| Lumajang | 3188 | 2271 | 140.5 |
| Blitar | 3085 | 2068 | 180.7 |
| Madiun | 3391 | 2169 | 220.9 |
Nearby places that are more than 1 °C1.8 °F cooler: Probolinggo, Malang, Kediri and Lumajang.
Other months in Surabaya
- January29 °C84 °F / 26 °C78 °F
- February29 °C83 °F / 25 °C78 °F
- March29 °C84 °F / 26 °C78 °F
- April30 °C85 °F / 26 °C79 °F
- May30 °C86 °F / 26 °C79 °F
- June30 °C87 °F / 25 °C77 °F
- July31 °C88 °F / 24 °C76 °F
- August32 °C90 °F / 24 °C76 °F
- September33 °C92 °F / 25 °C78 °F
- October33 °C92 °F / 26 °C80 °F
- November32 °C89 °F / 27 °C80 °F
- December30 °C85 °F / 26 °C79 °F
Frequently asked questions
How warm is Surabaya in August?
In August the average high in Surabaya is 32 °C (90 °F) and the average low is 24 °C (76 °F).
Does it rain a lot in Surabaya in August?
On average about 11 mm (0.4 in) of precipitation falls in August; it ranks 12th of the 12 months.
Is August the warmest month in Surabaya?
No. The warmest month in Surabaya is September, with an average high of 33 °C (92 °F). The coldest month is July, with an average low of 24 °C (76 °F).
How long is the day in Surabaya in August?
In the middle of August the day in Surabaya lasts about 11.9 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Surabaya in August?
The average relative humidity in August is about 65%. This is a long-term average for the whole day.
How cloudy is Surabaya in August?
On average about 39% of the sky is covered by cloud in August. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.