Negombo weather in August 2025

Expect daytime maximum temperatures of 88°F in Negombo, 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 typically 3.4 inches of rainfall in the month.

  • 88°F maximum daytime temperature in August in Negombo88
    88°F max day temperature
  • 6 hours of sunshine per day
  • 9 days with some rainfall in August in Negombo9
    9 days with some rainfall
  • 77°F minimum night-time temperature in August in Negombo77
    77°F min night temperature
  • 12 hours of daylight per day in August in Negombo12
    12 hours of daylight per day
  • High heat & humidity in August in NegomboH
    High heat & humidity
  • 3.4 inches monthly rainfall in August in Negombo3.4
    3.4 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Negombo11
    11+ (Extreme) UV index
  • 81°F sea temperature in August in Negombo81
    81°F sea temperature

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The August weather guide for Sri Lanka (Negombo) 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 Sri Lanka

How hot is it in Negombo in August?

Daytime temperatures usually reach 88°F in Negombo in August with high heat and humidity, falling to 77°F at night.

How sunny is it in Negombo in August?

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

How warm is the sea around Negombo in August?

The average sea temperature around Negombo in August is 81°F.

Does it rain in Negombo in August?

There are usually 9 days with some rain in Negombo in August and the average monthly rainfall is 3.4 inches.

Negombo August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 06:04 18:30
Saturday, 16th August 2025 06:04 18:25
Sunday, 31st August 2025 06:03 18:19

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