Union Island weather live forecast

Today's maximum temperature in Union Island is expected to be 79°F. Select a day from the live weather forecast for Union Island, St Vincent & the Grenadines for more weather parameters.

Tuesday
24th Mar
79

77

5

11
Wednesday
25th Mar
79

79

7

11
Thursday
26th Mar
79

79

7

11
Friday
27th Mar
79

77

5

11
Saturday
28th Mar
79

77

6

11

5-day weather forecast updated at 04:01 on Tuesday 24th 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 24th March 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 79°F, 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 17 mph from the east.

79
°F maximum temperature
77
°F minimum temperature
broken clouds
5
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
17
mph wind from E

Union Island weather for Wednesday 25th March 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 79°F, 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 17 mph from the east.

79
°F maximum temperature
79
°F minimum temperature
broken clouds
7
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
17
mph wind from E

Union Island weather for Thursday 26th March 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 79°F, 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 fresh breeze of 18 mph from the east.

79
°F maximum temperature
79
°F minimum temperature
broken clouds
7
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
18
mph wind from E

Union Island weather for Friday 27th March 2026

79
°F maximum temperature
77
°F minimum temperature
broken clouds
5
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
17
mph wind from E

Union Island weather for Saturday 28th March 2026

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 79°F, 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 16 mph from the east.