May is the hottest month in Surabaya with an average temperature of 25°C (75°F) and the coldest is August at 23°C (73°F) with the most daily sunshine hours at 9 in April. The wettest month is January with an average of 196.2mm of rain. The best month to swim in the sea is in April when the average sea temperature is 30°C (85°F).
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Sunrise 05:31
Sunset 18:02
Sunrise 05:31
Sunset 18:02