St Lucia weather live forecast

Today's maximum temperature in St Lucia is expected to be 82°F. Select a day from the live weather forecast for St Lucia (Castries) for more weather parameters.

Saturday
27th Dec
82

77

6

9
Sunday
28th Dec
84

77

6

7
Monday
29th Dec
82

79

4

7
Tuesday
30th Dec
82

79

4

8
Wednesday
31st Dec
84

79

4

9

5-day weather forecast updated at 04:00 on Saturday 27th 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.

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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 Saturday 27th December 2025

Expect broken clouds 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 mm of rainfall expected and a gentle breeze of 10 mph from the north-east.

82
°F maximum temperature
77
°F minimum temperature
broken clouds
6
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
10
mph wind from NE

St Lucia weather for Sunday 28th December 2025

Expect broken clouds in St Lucia with a maximum temperature of 84°F, moderate levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the north-east.

84
°F maximum temperature
77
°F minimum temperature
broken clouds
6
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
7
mph wind from NE

St Lucia weather for Monday 29th December 2025

Expect isolated thunderstorms in St Lucia with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 7 (High) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 40% chance of some rain and a gentle breeze of 10 mph from the north-east.

82
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
4
hours of sunshine
7
UV index (High)
40
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
10
mph wind from NE

St Lucia weather for Tuesday 30th 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 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 55% chance of some rain and a gentle breeze of 11 mph from the east.

82
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
4
hours of sunshine
8
UV index (Very High)
55
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
11
mph wind from E

St Lucia weather for Wednesday 31st 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 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 56% chance of some rain and a gentle breeze of 10 mph from the east.