Sri Lanka weather in August 2025

Expect 30°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Sri Lanka in August. Check more long-term weather averages for Sri Lanka in August before you book your next holiday to Sri Lanka in 2025/2026.

  • 30°C maximum daytime temperature in August in Sri Lanka (Colombo)30
    30°C max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in August in Sri Lanka (Colombo)11
    11 days with some rainfall
  • 25°C minimum night-time temperature in August in Sri Lanka (Colombo)25
    25°C min night temperature
  • 12 hours of daylight per day in August in Sri Lanka (Colombo)12
    12 hours of daylight per day
  • High heat & humidity in August in Sri Lanka (Colombo)H
    High heat & humidity
  • 116 mm monthly rainfall in August in Sri Lanka (Colombo)116
    116 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Sri Lanka (Colombo)11
    11+ (Extreme) UV index
  • 27°C sea temperature in August in Sri Lanka (Colombo)27
    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.

Top Sri Lanka destinations

Below are average maximum temperatures at popular countries, regions and places in Sri Lanka in August. Select a holiday destination to see more weather parameters.

All Sri Lanka destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Sri Lanka

How hot is it in Sri Lanka in August?

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

How sunny is it in Sri Lanka in August?

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

How warm is the sea around Sri Lanka in August?

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

Does it rain in Sri Lanka in August?

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

Sri Lanka August sunrise & sunset times

Browse the sunrise and sunset times for Sri Lanka in August 2025. Select a month to view Sri Lanka sunrise and sunset times for the next 12 months. The Sri Lanka sunrise and sunset times shown below are for Colombo.

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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