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St Lucia weather in April 2026
Expect daytime maximum temperatures of 29°C in St Lucia in April and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 11 days with some rainfall and typically 96 mm of rainfall in the month.
- 29°C max day temperature
29 - 8 hours of sunshine per day
- 11 days with some rainfall
11 - 23°C min night temperature
23 - 12 hours of daylight per day
12 - High heat & humidity
H - 96 mm of monthly rainfall
96 - 11+ (Extreme) UV index
11 - 27°C sea temperature
27
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Recommended for St Lucia
The April 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 April. 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 April?
Daytime temperatures usually reach 29°C in Castries, St Lucia in April with high heat and humidity, falling to 23°C at night.
How sunny is it in St Lucia in April?
There are normally 8 hours of bright sunshine each day in Castries, St Lucia in April - that's 67% of daylight hours.
How warm is the sea around St Lucia in April?
The average sea temperature around Castries, St Lucia in April is 27°C.
Does it rain in St Lucia in April?
There are usually 11 days with some rain in Castries, St Lucia in April and the average monthly rainfall is 96mm.
St Lucia April sunrise & sunset times
Browse the sunrise and sunset times for St Lucia in April 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 |
|---|---|---|
| Wednesday, 1st April 2026 | 06:00 | 18:16 |
| Wednesday, 15th April 2026 | 05:51 | 18:18 |
| Thursday, 30th April 2026 | 05:43 | 18:20 |
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