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.

Monday
16th Feb
79

79

7

11
Tuesday
17th Feb
79

77

7

11
Wednesday
18th Feb
79

79

7

11
Thursday
19th Feb
79

79

6

11
Friday
20th Feb
79

77

8

11

5-day weather forecast updated at 04:02 on Monday 16th February 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 Monday 16th February 2026

Expect isolated thunderstorms 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 0-2 mm of rainfall expected with 35% chance of some rain and a moderate breeze of 16 mph from the east.

79
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
7
hours of sunshine
11
UV index (Extreme)
35
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
16
mph wind from E

Union Island weather for Tuesday 17th February 2026

Expect isolated thunderstorms 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 2-5 mm of rainfall expected with 23% chance of some rain and a moderate breeze of 15 mph from the east.

79
°F maximum temperature
77
°F minimum temperature
isolated thunderstorms
7
hours of sunshine
11
UV index (Extreme)
23
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
15
mph wind from E

Union Island weather for Wednesday 18th February 2026

Expect isolated thunderstorms 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 0-2 mm of rainfall expected with 51% chance of some rain and a moderate breeze of 14 mph from the east.

79
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
7
hours of sunshine
11
UV index (Extreme)
51
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
14
mph wind from E

Union Island weather for Thursday 19th February 2026

Expect isolated thunderstorms 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 5-10 mm of rainfall expected with 57% chance of some rain and a moderate breeze of 15 mph from the east.

79
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
57
% chance of some rain
<10
mm of rainfall expected
L
low heat & humidity
15
mph wind from E

Union Island weather for Friday 20th February 2026

Expect isolated thunderstorms 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 0-2 mm of rainfall expected with 27% chance of some rain and a moderate breeze of 16 mph from the east.