Negombo weather in May 2026

Expect daytime maximum temperatures of 32°C in Negombo, Sri Lanka in May and very high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 12 days with some rainfall and typically 298 mm of rainfall in the month.

  • 32°C maximum daytime temperature in May in Negombo32
    32°C max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in May in Negombo12
    12 days with some rainfall
  • 25°C minimum night-time temperature in May in Negombo25
    25°C min night temperature
  • 12 hours of daylight per day in May in Negombo12
    12 hours of daylight per day
  • Very high heat & humidity in May in NegomboVH
    Very High heat & humidity
  • 298 mm monthly rainfall in May in Negombo298
    298 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Negombo11
    11+ (Extreme) UV index
  • 29°C sea temperature in May in Negombo29
    29°C sea temperature

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The May 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 / mm)  |  Imperial (°F / inches)

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More about Sri Lanka

How hot is it in Negombo in May?

Daytime temperatures usually reach 31°C in Negombo in May with very high heat and humidity, falling to 25°C at night.

How sunny is it in Negombo in May?

There are normally 6 hours of bright sunshine each day in Negombo in May - that's 51% of daylight hours.

How warm is the sea around Negombo in May?

The average sea temperature around Negombo in May is 29°C.

Does it rain in Negombo in May?

There are usually 14 days with some rain in Negombo in May and the average monthly rainfall is 382mm.

Negombo May sunrise & sunset times

Browse the sunrise and sunset times for Negombo in May 2026. Select a month to view Negombo sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:57 18:19
Saturday, 16th May 2026 05:53 18:21
Sunday, 31st May 2026 05:53 18:24

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