- Save on summer & winter sun holidays in 2023/2024
- Book holidays to popular destinations around the world
- Pay £0 deposits & spread cost with direct debit
St Lucia weather
Read our complete guide to the weather in St Lucia.
-
Usually
in June
-
Now
Today
Below are the temperatures expected today at popular destinations in St Lucia. Select a destination to compare today's forecast with average weather conditions.
First Choice deal finder
Recommended for St Lucia
The weather guide for St Lucia (Castries) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
When is the best time to go to St Lucia?
The best time to go to St Lucia (Castries) is January and February based on the following average weather conditions.
Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]
Change the criteria to reflect your weather preferences.
Max Day Temperature (°C)
- Jan
28 - Feb28
- Mar29
- Apr29
- May
30 - Jun30
- Jul30
- Aug30
- Sep30
- Oct30
- Nov29
- Dec29
Best time to go for the weather
Metric (°C / mm) | Imperial (°F / inches)
St Lucia weather overview
St Lucia, one of the Windward Islands, is large and mountainous with volcanic peaks. It attracts more rain than is normal tor the Caribbean.
This falls mainly from May to January and is most intense during the July to November hurricane season when tropical storms can make life difficult even if they don't hit the island directly.
The west coast (where Castries is located) is more sheltered from the prevailing winds.
Temperatures on St Lucia are high throughout the year but rarely unbearable since sea breezes help dissipate the humidity, although nights can be sticky.
Tropical storm risk: St Lucia hurricane season
% of month affected by tropical storms
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
The St Lucia tropical storm risk chart above shows the hurricane season. The chart was processed from data supplied by the US Meteorological Agency (NOAA). Find out more about our data sources.
What to pack for St Lucia weather
Light cotton clothing is appropriate, and be prepared for rain at any time of the year.
More about St Lucia
Which is the hottest month in St Lucia?
The hottest time of year in Castries, St Lucia is normally September. Expect maximum daytime temperatures to reach 30°C with very high heat and humidity.
Which month has the most rain in St Lucia?
In terms of rainfall, October is usually the wettest month in Castries, St Lucia with 269mm on average. There are normally 18 days in October with some rain.
When is it sunniest in St Lucia?
The sunniest time of year in Castries, St Lucia is normally January with bright sunshine on average for 72% of daylight hours; that's 8 hours of sunshine per day.
When is the sea warmest in St Lucia?
The sea is usually at its warmest in Castries, St Lucia in September when the water temperature reaches 29°C.
Compare St Lucia weather with the USA
Below the St Lucia weather chart shows average maximum daytime temperature for St Lucia (Castries) and the USA (Washington).
Maximum daytime temperature (°C)
St Lucia (Castries)
USA (Washington)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Metric (°C / mm) | Imperial (°F / inches)
Compare more St Lucia weather >>
Be inspired
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Related posts
Popular travel offers
Explore holidays in the sun for less
- Beach holidays
- Family holidays
- City breaks
- Summer holidays
- Winter sun holidays
- Holiday offers
- Top travel brands
- Airlines & flights
- Discount hotels
- Airport parking deals
- TUI
- Jet2holidays
- British Airways
- easyJet holidays
- Love Holidays