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.

Monday
22nd Dec
84

77

6

8
Tuesday
23rd Dec
84

77

5

8
Wednesday
24th Dec
84

77

7

9
Thursday
25th Dec
82

77

6

8
Friday
26th Dec
82

77

6

9

5-day weather forecast updated at 04:00 on Monday 22nd December 2025 GMT

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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.

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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 Monday 22nd December 2025

Expect broken clouds in St Lucia with a maximum temperature of 84°F, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the east.

84
°F maximum temperature
77
°F minimum temperature
broken clouds
6
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
9
mph wind from E

St Lucia weather for Tuesday 23rd December 2025

Expect sunshine and showers in St Lucia with a maximum temperature of 84°F, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 58% chance of some rain and a light breeze of 7 mph from the north-east.

84
°F maximum temperature
77
°F minimum temperature
sunshine and showers
5
hours of sunshine
8
UV index (Very High)
58
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
7
mph wind from NE

St Lucia weather for Wednesday 24th December 2025

Expect isolated thunderstorms in St Lucia with a maximum temperature of 84°F, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 33% chance of some rain and a light breeze of 7 mph from the north-east.

84
°F maximum temperature
77
°F minimum temperature
isolated thunderstorms
7
hours of sunshine
9
UV index (Very High)
33
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
7
mph wind from NE

St Lucia weather for Thursday 25th December 2025

Expect isolated thunderstorms in St Lucia with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 8 (Very High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 51% chance of some rain and little or no wind of 3 mph from the north-east.

82
°F maximum temperature
77
°F minimum temperature
isolated thunderstorms
6
hours of sunshine
8
UV index (Very High)
51
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
3
mph wind from NE

St Lucia weather for Friday 26th December 2025

Expect isolated thunderstorms in St Lucia with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 60% chance of some rain and a light breeze of 6 mph from the north-east.