Colombo weather in August 2025

Expect daytime maximum temperatures of 30°C in Colombo, Sri Lanka in August and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 116 mm of rainfall in the month.

  • 30°C maximum daytime temperature in August in Colombo30
    30°C max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in August in Colombo11
    11 days with some rainfall
  • 25°C minimum night-time temperature in August in Colombo25
    25°C min night temperature
  • 12 hours of daylight per day in August in Colombo12
    12 hours of daylight per day
  • High heat & humidity in August in ColomboH
    High heat & humidity
  • 116 mm monthly rainfall in August in Colombo116
    116 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Colombo11
    11+ (Extreme) UV index
  • 27°C sea temperature in August in Colombo27
    27°C sea temperature

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The August weather guide for Sri Lanka (Colombo) 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 / mm)  |  Imperial (°F / inches)

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More about Sri Lanka

How hot is it in Colombo in August?

Daytime temperatures usually reach 30°C in Colombo in August with high heat and humidity, falling to 25°C at night.

How sunny is it in Colombo in August?

There are normally 6 hours of bright sunshine each day in Colombo in August - that's 52% of daylight hours.

How warm is the sea around Colombo in August?

The average sea temperature around Colombo in August is 27°C.

Does it rain in Colombo in August?

There are usually 11 days with some rain in Colombo in August and the average monthly rainfall is 116mm.

Colombo August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 06:04 18:29
Saturday, 16th August 2025 06:05 18:25
Sunday, 31st August 2025 06:03 18:18

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