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.

Sunday
30th Aug
88

81

6

11
Monday
31st Aug
86

82

4

11
Tuesday
1st Sep
88

82

8

11
Wednesday
2nd Sep
88

82

8

11
Thursday
3rd Sep
88

82

8

11

5-day weather forecast updated at 04:00 on Sunday 30th August 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 Sunday 30th August 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 5-10 mm of rainfall expected with 75% chance of some rain and a gentle breeze of 9 mph from the south-east.

88
°F maximum temperature
81
°F minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
75
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
9
mph wind from SE

St Lucia weather for Monday 31st August 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 4 hours of bright sunshine. There are 5-10 mm of rainfall expected with 64% chance of some rain and a gentle breeze of 11 mph from the east.

86
°F maximum temperature
82
°F minimum temperature
isolated thunderstorms
4
hours of sunshine
11
UV index (Extreme)
64
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
11
mph wind from E

St Lucia weather for Tuesday 1st September 2026

Expect scattered clouds in St Lucia with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 10 mph from the east.

88
°F maximum temperature
82
°F minimum temperature
scattered clouds
8
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
M
moderate heat & humidity
10
mph wind from E

St Lucia weather for Wednesday 2nd September 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 8 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 east.

88
°F maximum temperature
82
°F minimum temperature
isolated thunderstorms
8
hours of sunshine
11
UV index (Extreme)
33
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
7
mph wind from E

St Lucia weather for Thursday 3rd September 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 8 hours of bright sunshine. There are 2-5 mm of rainfall expected with 53% chance of some rain and a light breeze of 6 mph from the east.