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.

Best time to visit St Lucia

Q: When is the best time to visit St Lucia?

The best time to visit St Lucia (Castries) is January and February based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 10 hours or more.

Q: 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.

Q: 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.

Q: 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.

Find the best time to visit St Lucia and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

St Lucia by month

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

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Top St Lucia destinations

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

All St Lucia destinations

When is the best time to visit St Lucia?

The best time to visit St Lucia (Castries) is January and February based on the following average weather conditions.

Maximum daytime temperature = 72 - 86°F [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

4
Jan
4
Feb
4
Mar
4
Apr
4
May
4
Jun
4
Jul
4
Aug
4
Sep
3.5
Oct
4
Nov
4
Dec

Change criteria

Max Day Temperature (°F)

82
Jan
82
Feb
84
Mar
84
Apr
86
May
86
Jun
86
Jul
86
Aug
86
Sep
86
Oct
84
Nov
84
Dec

Hours of Sunshine (daily)

8
Jan
8
Feb
8
Mar
8
Apr
8
May
8
Jun
8
Jul
8
Aug
8
Sep
7
Oct
8
Nov
8
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

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.

Metric (°C) | Imperial (°F)

St Lucia 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 small beach in 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

2.4%

3.6%

1.8%

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 about St Lucia

Explore our complete guide to St Lucia with the latest travel advice for travellers and holidaymakers including official updates and local travel tips for St Lucia.

Essential travel guide
Travel guidance
Travel health
Travel features
Top travel deals
FAQs

St Lucia travel guide - essential info

Below is a beginner's guide to St Lucia with essential travel facts such as dominant language spoken, typical flight time from the UK and the local currency. You can also check whether visas are required and what plug adapter you need to pack.

St Lucia - quick facts
Flight time^✝	9 hours
Time difference	UK -4 hours
Language(s)	English
Currency	Eastern Caribbean Dollar
Electricity	G plug (230V)
Driving side	Left

Why visit St Lucia?

Considering a holiday to the St Lucia? Here are some of the very good reasons it makes such a wonderful holiday destination be it for beaches or nature to ensure you get the most out of your 2025/2026 escape.

Beaches
Nature

St Lucia tourist information

Saint Lucia Tourism Authority

✝ = Typical flight time from the UK.

Travelling to St Lucia?
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St Lucia travel guidance

Check the latest travel guidance and advice on visiting St Lucia from official government sources (in english) from around the world including entry requirements and travel restrictions.

UK traveller advice for St Lucia - UK FCDO
Irish traveller advice for St Lucia - Department of Foreign Affairs, Ireland
Canadian travel advice for St Lucia - Government of Canada
US travel advisories for St Lucia - US Department of State
Safe travel advisories for St Lucia - Ministry of Foreign Affairs, New Zealand

Learn more about the current safety and security risks from terrorism, natural disasters and more. Read about the local laws and customs to consider when travelling around St Lucia.

Note: UK FCDO - UK Foreign, Commonwealth & Development Office

St Lucia travel health

Find out more about staying safe when travelling to St Lucia with the latest guidance on required vaccinations and recommended medication to take with you.

Vaccines & medicines for St Lucia - CDC
Health & vaccinations for St Lucia - TravelHealthPro, NaTHNac
How to stay safe & healthy in St Lucia - Fit for Travel, Public Health Scotland

Check out the general travel tips for staying safe and healthy in St Lucia, risks of preventable diseases and what to pack.

Note: CDC - Centers for Disease Control and Prevention

St Lucia travel features

Do you want to learn more about St Lucia? Read our latest features covering travel tips and insider destination guides on where to go and what to do in St Lucia.

St Lucia FAQs

Read our frequently asked questions about travelling to St Lucia including the current entry restrictions, driving side, electrical plugs used and much more.

Which month has the most rain in St Lucia?

In terms of rainfall, January is usually the wettest month in Castries, St Lucia with 0.0 inches on average. There are normally no days in January 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 0% of daylight hours; that's 0 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 January when the water temperature reaches 32°F.

What is the flight time to St Lucia from the UK?

The flight time to St Lucia from the UK is typically 9 hours.

What is the time difference between St Lucia and the UK?

The time difference between St Lucia and the UK is UK time-4 hours.

What is the main language spoken in St Lucia?

The main language spoken in St Lucia is English.

Learn a language for St Lucia with Rosetta Stone^*, Busuu^* and Rocket Languages^*.

What is the currency in St Lucia?

The currency in St Lucia is the Eastern Caribbean Dollar (XCD).

Send money to St Lucia with World Remit^*.

Which plugs are used in St Lucia?

St Lucia uses electrical plug type G (230 Volts) - the same as the UK.

Which side of the road do they drive on in St Lucia?

They drive on the left side of the road in St Lucia.

Find out more about driving in St Lucia with International Drivers Association^*.

St Lucia travel deals

Holidays to St Lucia

Check out the latest deals, discount codes and special offers on holidays to St Lucia in 2025/2026. Pay low deposits and save with last minute holiday availability and free kids places.