Union Island weather live forecast

Tomorrow's maximum temperature in Union Island is expected to be 81°F.

5-day weather forecast updated at 04:01 on Wednesday 4th June 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 Wednesday 4th June 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 81°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 28% chance of some rain and a moderate breeze of 15 mph from the east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 81°F minimum temperature81
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 11 (Extreme)11
    UV index (Extreme)
  • 28% chance of some rain28
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Moderate breeze of 15 mph from the East15
    mph wind from E

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Union Island weather for Thursday 5th June 2025

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 81°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 14 mph from the east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 81°F minimum temperature81
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 11 (Extreme)11
    UV index (Extreme)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Moderate breeze of 14 mph from the East14
    mph wind from E

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Union Island weather for Friday 6th June 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 81°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 32% chance of some rain and a moderate breeze of 13 mph from the east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 81°F minimum temperature81
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 11 (Extreme)11
    UV index (Extreme)
  • 32% chance of some rain32
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Moderate breeze of 13 mph from the East13
    mph wind from E

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Union Island weather for Saturday 7th June 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 11 (Extreme) and 6 hours of bright sunshine. There are 10-20 mm of rainfall expected with 41% chance of some rain and a moderate breeze of 14 mph from the east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 79°F minimum temperature79
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 11 (Extreme)11
    UV index (Extreme)
  • 41% chance of some rain41
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Moderate breeze of 14 mph from the East14
    mph wind from E

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Union Island weather for Sunday 8th June 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 81°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 48% chance of some rain and a moderate breeze of 16 mph from the east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 79°F minimum temperature79
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 11 (Extreme)11
    UV index (Extreme)
  • 48% chance of some rain48
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Moderate breeze of 16 mph from the East16
    mph wind from E

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Sandals promo code: up to £300 off Caribbean holidays

  • Save up to £300 on all inclusive holidays to the Caribbean
  • Discount varies by travel dates. 7 night minimum stay
  • Travel before 31st December 2027 (inclusive)
Show discount codeShow discount code ******DAY
Redeem Sandals discount code >>

Expires at 23:59 on Wednesday 4th Jun 2025 · View all Sandals offers

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