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St Lucia weather in May 2026
Expect daytime maximum temperatures of 30°C in St Lucia in May and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 15 days with some rainfall and typically 124 mm of rainfall in the month.
- 30°C max day temperature
30 - 8 hours of sunshine per day
- 15 days with some rainfall
15 - 24°C min night temperature
24 - 13 hours of daylight per day
13 - High heat & humidity
H - 124 mm of monthly rainfall
124 - 11+ (Extreme) UV index
11 - 28°C sea temperature
28
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Recommended for St Lucia
The May 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 May. 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 / mm) | Imperial (°F / inches)
More about St Lucia
How hot is it in St Lucia in May?
Daytime temperatures usually reach 30°C in Castries, St Lucia in May with high heat and humidity, falling to 24°C at night.
How sunny is it in St Lucia in May?
There are normally 8 hours of bright sunshine each day in Castries, St Lucia in May - that's 64% of daylight hours.
How warm is the sea around St Lucia in May?
The average sea temperature around Castries, St Lucia in May is 28°C.
Does it rain in St Lucia in May?
There are usually 15 days with some rain in Castries, St Lucia in May and the average monthly rainfall is 124mm.
St Lucia May sunrise & sunset times
Browse the sunrise and sunset times for St Lucia in May 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 |
|---|---|---|
| Friday, 1st May 2026 | 05:42 | 18:20 |
| Saturday, 16th May 2026 | 05:37 | 18:24 |
| Sunday, 31st May 2026 | 05:35 | 18:29 |
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