St Lucia weather

Get the latest coronavirus (COVID-19) updates for St Lucia with current travel advice, statistics and online resources.

Below are the temperatures expected today at popular destinations in St Lucia. Select a destination to compare today's forecast with average weather conditions.

More destinations >>

Recommended for St Lucia

  • Top deals & discounts
  • St Lucia climate averages by month
  • More destinations
  • Best time to go to St Lucia
  • St Lucia 5-day weather forecast
  • St Lucia weather today - current conditions (last 24-hours)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The weather guide for St Lucia 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.

  • Save up to 45% on all inclusive holidays to St Lucia
  • Extra discount of up to £600 on selected room types
  • Travel before 26th March 2023 (inclusive)

Expires at 23:59 on Thursday 17th Dec 2020 · View all Sandals offers

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.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Discover more about St Lucia

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 >>

  • Book online & save on TUI holidays in 2021/2022
  • Pay £0 deposits with direct debit
  • Plus free child places available

TUITUI deal finder

Back to top

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.

Tropical Beach at Marigot Bay, St Lucia © Tim Watson - Fotolia.com
Tropical Beach at Marigot Bay, St Lucia © Tim Watson - Fotolia.com

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
0
0
0
0
0
0
1%
2.4%
3.6%
1.8%
0
0
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.

More about tropical storms

What to pack for St Lucia weather

Light cotton clothing is appropriate, and be prepared for rain at any time of the year.

More St Lucia destinations

More destinations & map >>

Related posts

Popular travel offers

Top ^

*affiliate links: find out how we are funded and why this helps us remain free to use.