Union Island weather live forecast

Today's maximum temperature in Union Island is expected to be 28°C. Select a day from the live weather forecast for Union Island, St Vincent & the Grenadines for more weather parameters.

• Tuesday
  25th Nov
  28
  27
  
  6
  7
• Wednesday
  26th Nov
  28
  27
  
  4
  9
• Thursday
  27th Nov
  28
  27
  
  7
  9
• Friday
  28th Nov
  27
  27
  
  5
  9
• Saturday
  29th Nov
  28
  24
  
  8
  9

5-day weather forecast updated at 04:01 on Tuesday 25th November 2025 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 25th November 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 37% chance of some rain and a fresh breeze of 30 kph from the east.

• 28
  °C maximum temperature
• 27
  °C minimum temperature
• 
  isolated thunderstorms
• 6
  hours of sunshine
• 7
  UV index (High)
• 37
  % chance of some rain
• <10
  mm of rainfall expected
• L
  low heat & humidity
• 30
  kph wind from E

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Union Island weather for Wednesday 26th November 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 37% chance of some rain and a fresh breeze of 29 kph from the east.

• 28
  °C maximum temperature
• 27
  °C minimum temperature
• 
  isolated thunderstorms
• 4
  hours of sunshine
• 9
  UV index (Very High)
• 37
  % chance of some rain
• <5
  mm of rainfall expected
• L
  low heat & humidity
• 29
  kph wind from E

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Union Island weather for Thursday 27th November 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 7 hours of bright sunshine. There are 5-10 mm of rainfall expected with 70% chance of some rain and a fresh breeze of 29 kph from the east.

• 28
  °C maximum temperature
• 27
  °C minimum temperature
• 
  isolated thunderstorms
• 7
  hours of sunshine
• 9
  UV index (Very High)
• 70
  % chance of some rain
• <10
  mm of rainfall expected
• L
  low heat & humidity
• 29
  kph wind from E

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Union Island weather for Friday 28th November 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 5 hours of bright sunshine. There are 30-40 mm of rainfall expected with 57% chance of some rain and a fresh breeze of 29 kph from the east.

• 27
  °C maximum temperature
• 27
  °C minimum temperature
• 
  isolated thunderstorms
• 5
  hours of sunshine
• 9
  UV index (Very High)
• 57
  % chance of some rain
• <40
  mm of rainfall expected
• L
  low heat & humidity
• 29
  kph wind from E

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Union Island weather for Saturday 29th November 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 8 hours of bright sunshine. There are 2-5 mm of rainfall expected with 61% chance of some rain and a moderate breeze of 27 kph from the east.

• 28
  °C maximum temperature
• 24
  °C minimum temperature
• 
  isolated thunderstorms
• 8
  hours of sunshine
• 9
  UV index (Very High)
• 61
  % chance of some rain
• <5
  mm of rainfall expected
• L
  low heat & humidity
• 27
  kph wind from E

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Fred Olsen sale: £200pp off 2025/2026 cruises

Sale

• Save up to £200 per person on cruises in 2025/2026
• Book online in the Fred Olsen Black Friday sale
• Travel before 31st December 2026 (inclusive)

Go to Fred Olsen deal >>

Expires at 23:59 on Monday 1st Dec 2025 · View all Fred Olsen offers

Metric (°C / mm)  |  Imperial (°F / inches)

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