Surabaya Weather & Climate: Best Time to Visit

The climate in Surabaya remains fairly constant, offering very warm temperatures throughout the year. Average maximum daytime temperatures range from a very warm 35°C (95°F) in October, the warmest time of the year, to a very warm 32°C (90°F) during cooler months like August.

At night, you can expect temperatures ranging from 26°C (79°F) in October to around 24°C (75°F) during August.

Check out our detailed temperature page for more information.

Temperature ranges by month

Surabaya is known for its substantial rainfall, with annual precipitation reaching 1805 mm (71 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, February it receives heavy rainfall, averaging 304 mm (12 in) of precipitation, recorded across 17 rainy days. In contrast, the driest month August brings less rainfall, with 8.8 mm (0.3 in) over a single rainy day. For more details, please visit our Surabaya Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Surabaya. While August receives considerable daily sunshine with up to 8.2 hours, February marks the darkest time of the year, where sunshine is scarce with only 4.1 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Surabaya.

The city experiences its highest humidity in February, reaching 68%. In September, the humidity drops to its lowest level at 54%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year