St Lucia weather averages for holidays in 2017/2018

Check St Lucia weather averages before you book your next holiday in 2017/2018. Today's maximum temperature in St Lucia is expected to be 32°C, while the average maximum temperature in August is 30°C. The holiday weather guide shown below is for Castries.

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St Lucia weather averages

Check St Lucia weather averages before you book your next holiday. The warmest months in St Lucia are May, June, July, August, September and October with an average maximum temperature of 30°C. The sunniest months are January, February, March, April, May, June, July, August, September, November and December with on average 8 hours of bright sunshine per day. The month with the least number of days with some rain is April with 11 days. The sea is at its warmest in St Lucia in August, September and October with an average sea temperature of 29°C. The St Lucia weather averages shown below are for Castries.

Maximum daytime temperature (°C)

Hours of sunshine (daily)

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

Days with some rainfall

Sea temperature (°C)

More weather parameters

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

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St Lucia weather today

Here is the weather in St Lucia today, Saturday 19th August 2017. Expect isolated thunderstorms in St Lucia with a maximum temperature of 32°C, high levels of heat & humidity and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 49% chance of some rain and a moderate breeze of 23 kph from the east. The weather forecast shown below is for Castries.

  • 32
    °C maximum temperature
  • 27
    °C minimum temperature
  • isolated thunderstorms
  • 4
    hours of sunshine
  • 49
    % chance of some rain
  • <2
    mm of rainfall expected
  • H
    high heat & humidity
  • 23
    kph wind from E

5-day weather forecast

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

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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

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.

What to pack for St Lucia weather

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

Tropical storm risk: St Lucia hurricane season

% of month affected by tropical storms
0
0
0
0
0
<1%
1%
2%
4%
2%
<1%
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 for Castries, St Lucia.

More about tropical storms

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St Lucia holiday weather averages by month

Check St Lucia holiday weather averages for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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Compare St Lucia weather with the USA

Below the St Lucia weather chart shows maximum daytime temperature for St Lucia (Castries) and the USA (Washington). For more weather parameters or to change the destinations shown visit the comparison weather tool.

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)

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