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St Lucia weather in March 2026
Expect daytime maximum temperatures of 84°F in St Lucia in March based on long-term weather averages. There are 8 hours of sunshine per day on average with 13 days with some rainfall and typically 3.0 inches of rainfall in the month.
- 84°F max day temperature
84 - 8 hours of sunshine per day
- 13 days with some rainfall
13 - 72°F min night temperature
72 - 12 hours of daylight per day
12 - Moderate heat & humidity
M - 3.0 inches of monthly rainfall
3.0 - 11+ (Extreme) UV index
11 - 81°F sea temperature
81
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Recommended for St Lucia
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
- Anse la Raye
- Cap Estate
- Castries
- Choc Bay
- Grand Anse
- Gros Islet
- Marigot Bay
- Morgan Bay
- Reduit Beach
- Rodney Bay
- Soufriere
- Vieux Fort
Metric (°C) | Imperial (°F)
More about St Lucia
How hot is it in St Lucia in March?
Daytime temperatures usually reach 84°F in Castries, St Lucia in March with moderate heat and humidity, falling to 72°F 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 81°F.
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 3.0 inches.
St Lucia March sunrise & sunset times
Browse the sunrise and sunset times for St Lucia in March 2026. 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 |
|---|---|---|
| Sunday, 1st March 2026 | 06:20 | 18:12 |
| Monday, 16th March 2026 | 06:11 | 18:14 |
| Tuesday, 31st March 2026 | 06:01 | 18:16 |
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