Weather in Surabaya in August 2025
Average weather
Average temperature in Surabaya in August
Going from a maximum of +32°C during the day to a minimum of +23°C during the night, the temperature in August averages around +31°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +31°C to +31°C.
Is Surabaya warm or cold in August?
Surabaya is typically hot in August.
Maximum temperatures go up compared to the previous month from +31°C to +31°C. The minimum temperature also goes up from +24°C to +24°C.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
Take a look at how August is compared to other months in Surabaya:
Climate in Surabaya in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +31°C | +31°C | +32°C | ||||
| Min. temperature | ||||||
| +21°C | +20°C | +21°C | ||||
| Max. temperature | ||||||
| +34°C | +34°C | +36°C | ||||
| Rainfall | ||||||
| 21 mm | 7 mm | 22 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 73% | 70% | 68% | ||||
| Air pressure | ||||||
| 1010 HPa | 1010 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 10 | 13 | 9 | ||||
| Cloudy days | ||||||
| 10 | 11 | 10 | ||||
| Rainy days | ||||||
| 10 | 7 | 10 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as great as in July. The temperature levels stay the same in the area of +31°C for average maximum temperature during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 21 mm to 7 mm. It feels drier, as humidity decreases from 73% to 70%. The average wind speed doesn’t change much during August, staying around 2 m/s. The good news is there are likely to be more sunny days in August, from 10 to 13.
September brings much the same weather, it remains great.
Wind
The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Surabaya is gradually decreasing during August, going from 4 m/s to 3 m/s over the course of the month.
How was the weather last August in Surabaya?
Climate Change over Years
The climate in Surabaya in August has not changed much over the last 43 years.
The average temperature was the lowest in 1984 (+30°C) and the highest in 2009 (+33°C). The driest year was 1997 with only 1067 mm of rainfall, and the wettest year was 2010 with 2524 mm.
FAQ
Is August a good time to visit Surabaya?
Can you sunbathe in Surabaya in August?
Is Surabaya rainy in August?
Is it sunny in Surabaya in August?
Other cities in Indonesia
Monthly weather in Surabaya
Source of the data
For this page, we’ve looked at the typical weather in Surabaya, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
