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.

Tuesday
10th Mar
26

25

8

11
Wednesday
11th Mar
26

25

7

10
Thursday
12th Mar
26

25

7

11
Friday
13th Mar
26

25

7

11
Saturday
14th Mar
26

25

7

11

5-day weather forecast updated at 04:01 on Tuesday 10th March 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 Tuesday 10th March 2026

Expect scattered clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°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 fresh breeze of 33 kph from the east.

26
°C maximum temperature
25
°C minimum temperature
scattered clouds
8
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
33
kph wind from E

Union Island weather for Wednesday 11th March 2026

Expect sunshine and showers in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°C, maximum UV of 10 (Very High) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 56% chance of some rain and a moderate breeze of 28 kph from the east.

26
°C maximum temperature
25
°C minimum temperature
sunshine and showers
7
hours of sunshine
10
UV index (Very High)
56
% chance of some rain
<5
mm of rainfall expected
26
°C wind chill
28
kph wind from E

Union Island weather for Thursday 12th March 2026

Expect sunshine and showers in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 26% chance of some rain and a moderate breeze of 27 kph from the east.

26
°C maximum temperature
25
°C minimum temperature
sunshine and showers
7
hours of sunshine
11
UV index (Extreme)
26
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
27
kph wind from E

Union Island weather for Friday 13th March 2026

Expect sunshine and showers in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 40% chance of some rain and a moderate breeze of 24 kph from the east.

26
°C maximum temperature
25
°C minimum temperature
sunshine and showers
7
hours of sunshine
11
UV index (Extreme)
40
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
24
kph wind from E

Union Island weather for Saturday 14th March 2026

Expect scattered clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 26°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 26 kph from the north-east.