Union Island weather live forecast

Today's maximum temperature in Union Island is expected to be 26°C. Select a day from the live weather forecast for Union Island, St Vincent & the Grenadines for more weather parameters.

Wednesday
7th Jan
26

26

7

8
Thursday
8th Jan
26

26

7

7
Friday
9th Jan
26

26

6

9
Saturday
10th Jan
26

26

6

9
Sunday
11th Jan
26

26

6

10

5-day weather forecast updated at 04:01 on Wednesday 7th January 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 Wednesday 7th January 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 8 (Very High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the east.

26
°C maximum temperature
26
°C minimum temperature
broken clouds
7
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
24
kph wind from E

Union Island weather for Thursday 8th January 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the east.

26
°C maximum temperature
26
°C minimum temperature
broken clouds
7
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
25
kph wind from E

Union Island weather for Friday 9th January 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°C, 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 moderate breeze of 26 kph from the east.

26
°C maximum temperature
26
°C minimum temperature
broken clouds
6
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
26
kph wind from E

Union Island weather for Saturday 10th January 2026

26
°C maximum temperature
26
°C minimum temperature
broken clouds
6
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
24
kph wind from NE

Union Island weather for Sunday 11th January 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 10 (Very High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the east.