Castries weather live forecast

Today's maximum temperature in Castries is expected to be 30°C. Select a day from the live weather forecast for Castries, St Lucia for more weather parameters.

Wednesday
20th May
30

27

6

UV11
Thursday
21st May
30

27

6

UV11
Friday
22nd May
31

27

7

UV11
Saturday
23rd May
31

27

5

UV11
Sunday
24th May
30

27

7

UV11

5-day weather forecast updated at 04:00 on Wednesday 20th May 2026 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.

Castries weather forecast by day

Below are the detailed weather forecasts for Castries for the next 5 days.

Castries weather for Wednesday 20th May 2026

Expect isolated thunderstorms in Castries, St Lucia with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 43% chance of some rain and a moderate breeze of 20 kph from the east.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
UV11
UV index (Extreme)
43
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
20
kph wind from E

Castries weather for Thursday 21st May 2026

Expect isolated thunderstorms in Castries, St Lucia with a maximum temperature of 30°C, 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 40% chance of some rain and a gentle breeze of 18 kph from the east.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
UV11
UV index (Extreme)
40
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
18
kph wind from E

Castries weather for Friday 22nd May 2026

Expect isolated thunderstorms in Castries, St Lucia with a maximum temperature of 31°C, 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 52% chance of some rain and a gentle breeze of 18 kph from the east.

31
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
7
hours of sunshine
UV11
UV index (Extreme)
52
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
18
kph wind from E

Castries weather for Saturday 23rd May 2026

Expect isolated thunderstorms in Castries, St Lucia with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 53% chance of some rain and a gentle breeze of 19 kph from the east.

31
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
UV11
UV index (Extreme)
53
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
19
kph wind from E

Castries weather for Sunday 24th May 2026

Expect isolated thunderstorms in Castries, St Lucia with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 7 hours of bright sunshine. There are 5-10 mm of rainfall expected with 74% chance of some rain and a gentle breeze of 18 kph from the east.