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.

Friday
6th Mar
79

77

8

11
Saturday
7th Mar
79

77

5

11
Sunday
8th Mar
79

77

6

11
Monday
9th Mar
79

77

6

11
Tuesday
10th Mar
79

77

6

11

5-day weather forecast updated at 04:01 on Friday 6th 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 Friday 6th March 2026

Expect scattered 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 8 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 19 mph from the east.

79
°F maximum temperature
77
°F minimum temperature
scattered clouds
8
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
19
mph wind from E

Union Island weather for Saturday 7th March 2026

Expect sunshine and showers 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 2-5 mm of rainfall expected with 48% chance of some rain and a fresh breeze of 19 mph from the east.

79
°F maximum temperature
77
°F minimum temperature
sunshine and showers
5
hours of sunshine
11
UV index (Extreme)
48
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
19
mph wind from E

Union Island weather for Sunday 8th 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 fresh breeze of 20 mph from the east.

79
°F maximum temperature
77
°F minimum temperature
broken clouds
6
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
20
mph wind from E

Union Island weather for Monday 9th March 2026

Expect sunshine and showers 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 0-2 mm of rainfall expected with 45% chance of some rain and a fresh breeze of 19 mph from the east.

79
°F maximum temperature
77
°F minimum temperature
sunshine and showers
6
hours of sunshine
11
UV index (Extreme)
45
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
19
mph wind from E

Union Island weather for Tuesday 10th 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 fresh breeze of 18 mph from the east.