St Lucia weather

Our guide to the weather in St Lucia during April

28

Average high

6

UV Index

61mm

Monthly rainfall

27

Sea temperature

St Lucia is a lush tropical Caribbean island and is very warm all year round. We've looked at the most up-to-date weather data for St Lucia, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about St Lucia weather in April.

How warm is it in St Lucia during April?

The temperature is extremely stable in April with average highs of 28℃ and lows just 3℃ lower at 26℃. Of course, the high humidity will make it feel even hotter. The UV index will be high at this time of year, so protection against skin and eye damage is needed. Try to limit exposure between 10am and 4pm. Apply broad spectrum SPF 30+ sunscreen every few hours, even if it's cloudy, or more frequently after sweating or swimming, and wear UV-blocking sunglasses too, and bear in mind that bright surfaces, such as sand and water increase UV exposure.

Does it rain in St Lucia during April?

On average, there will be 2 rainy days during the month, amounting to 61.0mm in total. That's broadly comparable with the amount of rain we see in England during the summer months, and would be considered dry. You're not likely to see a thunderstorm during your trip.

Is it windy in St Lucia during April?

Expect moderate breeze becoming stronger at times during April, with occasional gusts up to 18mph. The high humidity and warm temperature will make the breeze feel warm, so any cooling effect will be limted.

How warm is the sea in St Lucia during April?

The water around St Lucia reaches a very pleasant 27℃ during April. This is very warm, and will feel bath-like. People who normally feel the cold will find this temperature perfectly acceptable. The hot air temperature and relatively high humidity will mean that you will feel comfortably warm when coming out of the water.

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Weather in St Lucia

Our month-by-month guide to the weather and climate in St Lucia

27.5

St Lucia weather in

January
27.3

St Lucia weather in

February
27.5

St Lucia weather in

March
28.2

St Lucia weather in

April
28.9

St Lucia weather in

May
29.1

St Lucia weather in

June
29.2

St Lucia weather in

July
29.8

St Lucia weather in

August
30.4

St Lucia weather in

September
29.9

St Lucia weather in

October
29.0

St Lucia weather in

November
28.2

St Lucia weather in

December