St John's weather live forecast

Today's maximum temperature in St John's is expected to be 86°F. Select a day from the live weather forecast for St John's, Antigua for more weather parameters.

• Monday
  15th Sep
  86
  79
  
  7
  8
• Tuesday
  16th Sep
  86
  79
  
  5
  10
• Wednesday
  17th Sep
  86
  79
  
  3
  7
• Thursday
  18th Sep
  86
  79
  
  7
  11
• Friday
  19th Sep
  86
  79
  
  7
  11

5-day weather forecast updated at 04:01 on Monday 15th September 2025 GMT

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The 5-day weather forecast for Antigua (St John's) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

St John's weather forecast by day

Below are the detailed weather forecasts for St John's for the next 5 days.

St John's weather for Monday 15th September 2025

Expect isolated thunderstorms in St John's, Antigua with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 69% chance of some rain and a moderate breeze of 13 mph from the east.

• 86
  °F maximum temperature
• 79
  °F minimum temperature
• 
  isolated thunderstorms
• 7
  hours of sunshine
• 8
  UV index (Very High)
• 69
  % chance of some rain
• <2
  mm of rainfall expected
• M
  moderate heat & humidity
• 13
  mph wind from E

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St John's weather for Tuesday 16th September 2025

Expect isolated thunderstorms in St John's, Antigua with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 5 hours of bright sunshine. There are 5-10 mm of rainfall expected with 95% chance of some rain and a moderate breeze of 13 mph from the east.

• 86
  °F maximum temperature
• 79
  °F minimum temperature
• 
  isolated thunderstorms
• 5
  hours of sunshine
• 10
  UV index (Very High)
• 95
  % chance of some rain
• <10
  mm of rainfall expected
• M
  moderate heat & humidity
• 13
  mph wind from E

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St John's weather for Wednesday 17th September 2025

Expect isolated thunderstorms in St John's, Antigua with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 94% chance of some rain and a moderate breeze of 13 mph from the south-east.

• 86
  °F maximum temperature
• 79
  °F minimum temperature
• 
  isolated thunderstorms
• 3
  hours of sunshine
• 7
  UV index (High)
• 94
  % chance of some rain
• <30
  mm of rainfall expected
• M
  moderate heat & humidity
• 13
  mph wind from SE

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St John's weather for Thursday 18th September 2025

Expect isolated thunderstorms in St John's, Antigua with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 71% chance of some rain and a gentle breeze of 10 mph from the east.

• 86
  °F maximum temperature
• 79
  °F minimum temperature
• 
  isolated thunderstorms
• 7
  hours of sunshine
• 11
  UV index (Extreme)
• 71
  % chance of some rain
• <5
  mm of rainfall expected
• M
  moderate heat & humidity
• 10
  mph wind from E

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St John's weather for Friday 19th September 2025

Expect isolated thunderstorms in St John's, Antigua with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 58% chance of some rain and a light breeze of 6 mph from the east.

• 86
  °F maximum temperature
• 79
  °F minimum temperature
• 
  isolated thunderstorms
• 7
  hours of sunshine
• 11
  UV index (Extreme)
• 58
  % chance of some rain
• <5
  mm of rainfall expected
• M
  moderate heat & humidity
• 6
  mph wind from E

Back to top

Sandals sale: up to £300 off Caribbean holidays

Discount Code

• Save up to £300 on all inclusive holidays to the Caribbean
• Discount varies by total spend. 7 night minimum stay
• Travel before 31st December 2027 (inclusive)

Show discount code ******ALE

Redeem Sandals discount code >>

Expires at 23:59 on Tuesday 30th Sep 2025 · View all Sandals offers

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