St Lucia weather in March 2025

Expect 29°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in St Lucia in March. Check more long-term weather averages for St Lucia in March before you book your next holiday to St Lucia in 2025/2026.

  • 29°C maximum daytime temperature in March in St Lucia (Castries)29
    29°C max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in March in St Lucia (Castries)13
    13 days with some rainfall
  • 22°C minimum night-time temperature in March in St Lucia (Castries)22
    22°C min night temperature
  • 12 hours of daylight per day in March in St Lucia (Castries)12
    12 hours of daylight per day
  • Moderate heat & humidity in March in St Lucia (Castries)M
    Moderate heat & humidity
  • 76 mm monthly rainfall in March in St Lucia (Castries)76
    76 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in March in St Lucia (Castries)11
    11+ (Extreme) UV index
  • 27°C sea temperature in March in St Lucia (Castries)27
    27°C sea temperature

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The March weather guide for St Lucia (Castries) 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 St Lucia destinations

Below are average maximum temperatures at popular countries, regions and places in St Lucia in March. Select a holiday destination to see more weather parameters.

All St Lucia destinations

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

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More about St Lucia

How hot is it in St Lucia in March?

Daytime temperatures usually reach 29°C in Castries, St Lucia in March with moderate heat and humidity, falling to 22°C at night.

How sunny is it in St Lucia in March?

There are normally 8 hours of bright sunshine each day in Castries, St Lucia in March - that's 69% of daylight hours.

How warm is the sea around St Lucia in March?

The average sea temperature around Castries, St Lucia in March is 27°C.

Does it rain in St Lucia in March?

There are usually 13 days with some rain in Castries, St Lucia in March and the average monthly rainfall is 76mm.

St Lucia March sunrise & sunset times

Browse the sunrise and sunset times for St Lucia in March 2025. Select a month to view St Lucia sunrise and sunset times for the next 12 months. The St Lucia sunrise and sunset times shown below are for Castries.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st March 2025 06:20 18:12
Sunday, 16th March 2025 06:11 18:14
Monday, 31st March 2025 06:00 18:16

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