St. Lucia

Avg weather in August
12 Hrs per day
219 mm per month
73 % avg
13 Mph avg

St. Lucia Weather in August

destination intro image

What’s the weather like in St Lucia in August?

Sitting in the Caribbean Sea and close to the equator, St Lucia has warm, dry weather over the summer and August is no exception. As one of the hottest months on the island, August is a popular time of year to visit St Lucia, but it’s also quite wet and cloudy so make sure you prepare for some showers and thunderstorms. On the beach you’ll enjoy relaxing in the golden sands and swimming in the warm, clear waters as you soak up the Caribbean sunshine.


On average, daytime temperatures in St Lucia hover around 29°C at this time of year, with highs of 31°C in the hottest part of the afternoon. At night the temperature dips just a few degrees to 26°C, so you’ll be grateful for air conditioning at your hotel. Although August is very hot with around eight hours of sunshine each day, it’s also quite wet with 175mm of rain expected across the month. With a high chance of showers, you’ll need to bring a light rain coat to stay dry during wet spells.

View weather for