Gros Islet weather live forecast

Today's maximum temperature in Gros Islet is expected to be 31°C. Select a day from the live weather forecast for Gros Islet, St Lucia for more weather parameters.

Tuesday
18th Aug
31

27

6

11
Wednesday
19th Aug
31

28

6

11
Thursday
20th Aug
31

27

6

11
Friday
21st Aug
31

28

6

10
Saturday
22nd Aug
31

27

7

11

5-day weather forecast updated at 04:03 on Tuesday 18th August 2026 GMT

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The 5-day weather forecast for St Lucia (Gros Islet) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Gros Islet weather forecast by day

Below are the detailed weather forecasts for Gros Islet for the next 5 days.

Gros Islet weather for Tuesday 18th August 2026

Expect isolated thunderstorms in Gros Islet, St Lucia with a maximum temperature of 31°C, 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 42% chance of some rain and a light breeze of 8 kph from the south-east.

31
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
42
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
8
kph wind from SE

Gros Islet weather for Wednesday 19th August 2026

Expect isolated thunderstorms in Gros Islet, St Lucia with a maximum temperature of 31°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 48% chance of some rain and a gentle breeze of 16 kph from the east.

31
°C maximum temperature
28
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
48
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
16
kph wind from E

Gros Islet weather for Thursday 20th August 2026

Expect isolated thunderstorms in Gros Islet, St Lucia with a maximum temperature of 31°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 35% chance of some rain and a moderate breeze of 21 kph from the east.

31
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
35
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
21
kph wind from E

Gros Islet weather for Friday 21st August 2026

Expect isolated thunderstorms in Gros Islet, St Lucia with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 66% chance of some rain and a gentle breeze of 17 kph from the east.

31
°C maximum temperature
28
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
10
UV index (Very High)
66
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
17
kph wind from E

Gros Islet weather for Saturday 22nd August 2026

Expect isolated thunderstorms in Gros Islet, 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 10-20 mm of rainfall expected with 78% chance of some rain and a gentle breeze of 17 kph from the east.