St Lucia weather

Our guide to the weather in St Lucia during July

29

Average high

6

UV Index

139mm

Monthly rainfall

28

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 July.

Is July hurricane season?

Paul The Caribbean hurricane season runs from 1st June to 30st November. However, it's relatively rare for hurricanes to form early in the season. Even in the peak hurricane month of September, the chances of your holiday being affected are very small. In the unlikely event that a hurricane does track towards St Lucia, forecasting of North Atlantic storms is highly advanced and you'll get plenty of warning and instruction. Answered by Paul

How warm is it in St Lucia during July?

The temperature is extremely stable in July with average highs of 29℃ and lows just 3℃ lower at 27℃. 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 July?

On average, there will be 6 rainy days during the month, amounting to 138.5mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. Due to the high temperature and humidity, you might expect lots of thunderstorms, however they're actually fairly infrequent at this time of year. On average, July will see just 2 days that produce a storm.

Is it windy in St Lucia during July?

Expect moderate breeze becoming stronger at times during July, with occasional gusts up to 20mph. 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 July?

The water around St Lucia reaches a very pleasant 28℃ during July. 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