Union Island weather live forecast

Today's maximum temperature in Union Island is expected to be 27°C. Select a day from the live weather forecast for Union Island, St Vincent & the Grenadines for more weather parameters.

Thursday
30th Apr
27

27

7

11
Friday
1st May
27

27

9

11
Saturday
2nd May
27

26

8

11
Sunday
3rd May
27

27

5

11
Monday
4th May
28

27

6

11

5-day weather forecast updated at 04:01 on Thursday 30th April 2026 GMT

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The 5-day weather forecast for St Vincent & the Grenadines (Union Island) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Union Island weather forecast by day

Below are the detailed weather forecasts for Union Island for the next 5 days.

Union Island weather for Thursday 30th April 2026

Expect scattered clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the east.

27
°C maximum temperature
27
°C minimum temperature
scattered clouds
7
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
25
kph wind from E

Union Island weather for Friday 1st May 2026

Expect scattered clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the east.

27
°C maximum temperature
27
°C minimum temperature
scattered clouds
9
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
24
kph wind from E

Union Island weather for Saturday 2nd May 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 26 kph from the east.

27
°C maximum temperature
26
°C minimum temperature
broken clouds
8
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
26
kph wind from E

Union Island weather for Sunday 3rd May 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 28 kph from the east.

27
°C maximum temperature
27
°C minimum temperature
broken clouds
5
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
28
kph wind from E

Union Island weather for Monday 4th May 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the east.