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.

Friday
13th Mar
26

25

6

11
Saturday
14th Mar
26

25

7

11
Sunday
15th Mar
26

25

4

10
Monday
16th Mar
26

25

7

11
Tuesday
17th Mar
26

25

7

11

5-day weather forecast updated at 04:01 on Friday 13th 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 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 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 17% chance of some rain and a moderate breeze of 26 kph from the east.

26
°C maximum temperature
25
°C minimum temperature
sunshine and showers
6
hours of sunshine
11
UV index (Extreme)
17
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
26
kph wind from E

Union Island weather for Saturday 14th March 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 11+ (Extreme) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 28 kph from the east.

26
°C maximum temperature
25
°C minimum temperature
broken clouds
7
hours of sunshine
11
UV index (Extreme)
0
mm of rainfall expected
L
low heat & humidity
28
kph wind from E

Union Island weather for Sunday 15th March 2026

Expect isolated thunderstorms 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 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 49% chance of some rain and a fresh breeze of 33 kph from the east.

26
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
10
UV index (Very High)
49
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
33
kph wind from E

Union Island weather for Monday 16th 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 0-2 mm of rainfall expected with 28% chance of some rain and a fresh breeze of 35 kph from the east.

26
°C maximum temperature
25
°C minimum temperature
sunshine and showers
7
hours of sunshine
11
UV index (Extreme)
28
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
35
kph wind from E

Union Island weather for Tuesday 17th 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 fresh breeze of 33 kph from the east.