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August Weather in Surabaya, Indonesia

Last updated: August 23, 2025

In Surabaya, Indonesia, the average temperature in August is a warm 27°C (80°F). Expect minimums around 21°C (70°F) and maximums reaching up to 33°C (91°F). Be prepared for some rain, as the area sees an average precipitation of 77 mm (3.0 in) over 17 days, coupled with a humidity level of 78%.

August Temperature in Surabaya

In August in Surabaya, the average temperature is 27°C (80°F). The maximum can reach 33°C (91°F), and the minimum can be as low as 21°C (70°F). This pleasant climate makes Surabaya a great destination for travelers looking to enjoy warm weather and outdoor activities.

August Weather in Surabaya: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Surabaya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Surabaya, August typically has an average temperature of 27°C (80°F), with highs reaching up to 33°C (91°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec818181828281808081828281
Data source: Temperature data for Surabaya generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Surabaya

In Surabaya in August, the precipitation amount is 77 mm (3.0 in) over a span of 17 days.

August Precipitation Trends in Surabaya

The chart displays monthly precipitation patterns in Surabaya, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Surabaya, August typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec2573254183182421981077797118250340
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Surabaya

In Surabaya in August, humidity is 78%. With an average temperature of 27°C (80°F), this humidity feels like a heavy blanket enveloping you, making travel feel more exhausting and sweat-inducing than usual.

August Average Humidity in Surabaya

This chart illustrates the average monthly humidity levels in Surabaya, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Surabaya is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%84%82%80%80%80%78%74%76%78%80%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Surabaya

In Surabaya in August, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Surabaya.

Maximum UV Index Levels in Surabaya for August

The chart shows the monthly maximum UV Index (UVI) for Surabaya in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Surabaya typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151516151311121314151514
Data source: Surabaya August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Surabaya Compares to Other Months

Weather in Surabaya varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Surabaya, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Surabaya, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)257 mm (10.1 inches)85%extreme
February Weather27°C (81°F)325 mm (12.8 inches)86%extreme
March Weather27°C (81°F)418 mm (16.4 inches)84%extreme
April Weather28°C (82°F)318 mm (12.5 inches)82%extreme
May Weather28°C (82°F)242 mm (9.5 inches)80%extreme
June Weather27°C (81°F)198 mm (7.8 inches)80%extreme
July Weather27°C (80°F)107 mm (4.2 inches)80%extreme
August Weather27°C (80°F)77 mm (3.0 inches)78%extreme
September Weather27°C (81°F)97 mm (3.8 inches)74%extreme
October Weather28°C (82°F)118 mm (4.6 inches)76%extreme
November Weather28°C (82°F)250 mm (9.8 inches)78%extreme
December Weather27°C (81°F)340 mm (13.4 inches)80%extreme

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