Surabaja weather in August 2025

Expect 90°F daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Surabaja in August. Check more long-term weather averages for Surabaja in August before you book your next holiday to Indonesia in 2025/2026.

  • 90°F maximum daytime temperature in August in Surabaja90
    90°F max day temperature
  • 11 hours of sunshine per day
  • 1 day with some rainfall in August in Surabaja1
    1 day with some rainfall
  • 73°F minimum night-time temperature in August in Surabaja73
    73°F min night temperature
  • 12 hours of daylight per day in August in Surabaja12
    12 hours of daylight per day
  • High heat & humidity in August in SurabajaH
    High heat & humidity
  • 0.5 inches monthly rainfall in August in Surabaja0.5
    0.5 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Surabaja11
    11+ (Extreme) UV index
  • 82°F sea temperature in August in Surabaja82
    82°F sea temperature

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The August weather guide for Indonesia (Surabaja) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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More about Indonesia

How hot is it in Surabaja in August?

Daytime temperatures usually reach 90°F in Surabaja in August with high heat and humidity, falling to 73°F at night.

How sunny is it in Surabaja in August?

There are normally 11 hours of bright sunshine each day in Surabaja in August - that's 93% of daylight hours.

How warm is the sea around Surabaja in August?

The average sea temperature around Surabaja in August is 82°F.

Does it ever rain in Surabaja in August?

There is usually 1 day with some rain in Surabaja in August and the average monthly rainfall is 0.5 inches.

Surabaja August sunrise & sunset times

Browse the sunrise and sunset times for Surabaja in August 2025. Select a month to view Surabaja sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:41 17:29
Saturday, 16th August 2025 05:37 17:30
Sunday, 31st August 2025 05:31 17:28

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