Mirissa Beach weather in August 2025

Expect 29°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Mirissa Beach in August. Check more long-term weather averages for Mirissa Beach in August before you book your next holiday to Sri Lanka in 2025/2026.

  • 29°C maximum daytime temperature in August in Mirissa Beach29
    29°C max day temperature
  • 6 hours of sunshine per day
  • 9 days with some rainfall in August in Mirissa Beach9
    9 days with some rainfall
  • 24°C minimum night-time temperature in August in Mirissa Beach24
    24°C min night temperature
  • 12 hours of daylight per day in August in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in August in Mirissa BeachH
    High heat & humidity
  • 149 mm monthly rainfall in August in Mirissa Beach149
    149 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Mirissa Beach11
    11+ (Extreme) UV index
  • 27°C sea temperature in August in Mirissa Beach27
    27°C sea temperature

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The August weather guide for Sri Lanka (Mirissa Beach) 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 Mirissa Beach in August?

Daytime temperatures usually reach 29°C in Mirissa Beach in August with high heat and humidity, falling to 24°C at night.

How sunny is it in Mirissa Beach in August?

There are normally 6 hours of bright sunshine each day in Mirissa Beach in August - that's 50% of daylight hours.

How warm is the sea around Mirissa Beach in August?

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

Does it rain in Mirissa Beach in August?

There are usually 9 days with some rain in Mirissa Beach in August and the average monthly rainfall is 149mm.

Mirissa Beach August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 06:03 18:26
Saturday, 16th August 2025 06:03 18:22
Sunday, 31st August 2025 06:02 18:15

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