St Lucia weather live forecast

Today's maximum temperature in St Lucia is expected to be 88°F. Select a day from the live weather forecast for St Lucia (Castries) for more weather parameters.

Friday
15th May
88

81

6

11
Saturday
16th May
88

81

6

11
Sunday
17th May
88

81

6

11
Monday
18th May
88

81

5

10
Tuesday
19th May
88

81

7

11

5-day weather forecast updated at 04:00 on Friday 15th May 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 Friday 15th May 2026

Expect broken clouds in St Lucia with a maximum temperature of 88°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 moderate breeze of 13 mph from the east.

88
°F maximum temperature
81
°F minimum temperature
broken clouds
6
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
M
moderate heat & humidity
13
mph wind from E

St Lucia weather for Saturday 16th May 2026

Expect isolated thunderstorms in St Lucia with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 39% chance of some rain and a moderate breeze of 13 mph from the east.

88
°F maximum temperature
81
°F minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
39
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
13
mph wind from E

St Lucia weather for Sunday 17th May 2026

Expect isolated thunderstorms in St Lucia with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 41% chance of some rain and a moderate breeze of 14 mph from the east.

88
°F maximum temperature
81
°F minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
41
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
14
mph wind from E

St Lucia weather for Monday 18th May 2026

Expect isolated thunderstorms in St Lucia with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 56% chance of some rain and a moderate breeze of 13 mph from the east.

88
°F maximum temperature
81
°F minimum temperature
isolated thunderstorms
5
hours of sunshine
10
UV index (Very High)
56
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
13
mph wind from E

St Lucia weather for Tuesday 19th May 2026

Expect isolated thunderstorms in St Lucia with a maximum temperature of 88°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 46% chance of some rain and a moderate breeze of 13 mph from the east.