St Lucia weather live forecast

Today's maximum temperature in St Lucia is expected to be 84°F. Select a day from the live weather forecast for St Lucia (Castries) for more weather parameters.

Wednesday
22nd Apr
84

77

6

11
Thursday
23rd Apr
84

77

7

11
Friday
24th Apr
86

77

7

11
Saturday
25th Apr
86

79

6

8
Sunday
26th Apr
86

79

6

5

5-day weather forecast updated at 04:00 on Wednesday 22nd April 2026 GMT

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Destination

The 5-day weather forecast for St Lucia (Castries) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Top St Lucia destinations

Below are temperatures expected today at popular countries, regions and places in St Lucia. Select a destination to see the detailed weather forecast for today, tomorrow and the outlook for the next five days.

All St Lucia destinations

St Lucia weather forecast by day

Below are the detailed weather forecasts for St Lucia for the next 5 days. The forecasts shown are for Castries and may not represent the whole of St Lucia. Browse more destinations in St Lucia to view more weather forecasts.

St Lucia weather for Wednesday 22nd April 2026

Expect broken clouds in St Lucia with a maximum temperature of 84°F, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 5 mph from the east.

84
°F maximum temperature
77
°F minimum temperature
broken clouds
6
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
M
moderate heat & humidity
5
mph wind from E

St Lucia weather for Thursday 23rd April 2026

Expect isolated thunderstorms in St Lucia with a maximum temperature of 84°F, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 36% chance of some rain and a light breeze of 4 mph from the east.

84
°F maximum temperature
77
°F minimum temperature
isolated thunderstorms
7
hours of sunshine
11
UV index (Extreme)
36
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
4
mph wind from E

St Lucia weather for Friday 24th April 2026

Expect isolated thunderstorms in St Lucia with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 45% chance of some rain and a light breeze of 6 mph from the east.

86
°F maximum temperature
77
°F minimum temperature
isolated thunderstorms
7
hours of sunshine
11
UV index (Extreme)
45
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
6
mph wind from E

St Lucia weather for Saturday 25th April 2026

Expect isolated thunderstorms in St Lucia with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 58% chance of some rain and a light breeze of 7 mph from the east.

86
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
6
hours of sunshine
8
UV index (Very High)
58
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
7
mph wind from E

St Lucia weather for Sunday 26th April 2026

Expect isolated thunderstorms in St Lucia with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 39% chance of some rain and a gentle breeze of 9 mph from the east.