St John's weather in August 2025

Q: How hot is it in St John's in August?

Daytime temperatures usually reach 31°C in St John's in August with very high heat and humidity, falling to 25°C at night.

Q: How sunny is it in St John's in August?

There are normally 8 hours of bright sunshine each day in St John's in August - that's 64% of daylight hours.

Q: How warm is the sea around St John's in August?

The average sea temperature around St John's in August is 28°C.

Q: Does it rain in St John's in August?

There are usually 16 days with some rain in St John's in August and the average monthly rainfall is 124mm.

Q: What is the chance of a cyclone in St John's in August?

On average less than 1 day in August in St John's is likely to be affected by the passage of one or more tropical storms.

Expect 31°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in St John's in August. Check more long-term weather averages for St John's in August before you book your next holiday to Antigua in 2025/2026.

31
31°C max day temperature
8
8 hours of sunshine per day
16
16 days with some rainfall
25
25°C min night temperature
13
13 hours of daylight per day
VH
Very High heat & humidity
124
124 mm of monthly rainfall
11
11+ (Extreme) UV index
28
28°C sea temperature

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The August weather guide for Antigua (St John's) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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

More about Antigua

How hot is it in St John's in August?

Daytime temperatures usually reach 31°C in St John's in August with very high heat and humidity, falling to 25°C at night.

How sunny is it in St John's in August?

There are normally 8 hours of bright sunshine each day in St John's in August - that's 64% of daylight hours.

How warm is the sea around St John's in August?

The average sea temperature around St John's in August is 28°C.

Does it rain in St John's in August?

There are usually 16 days with some rain in St John's in August and the average monthly rainfall is 124mm.

What is the chance of a hurricane in St John's in August?

On average less than 1 day in August in St John's is likely to be affected by the passage of one or more tropical storms.

St John's August sunrise & sunset times

Browse the sunrise and sunset times for St John's in August 2025. Select a month to view St John's sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Friday, 1st August 2025	05:47	18:40
Saturday, 16th August 2025	05:51	18:32
Sunday, 31st August 2025	05:54	18:21

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Antigua - quick facts
Flight time^✝	9 hours
Time difference	UK -4 hours
Language(s)	English
Currency	Eastern Caribbean Dollar
Electricity	A + B plug (230V)
Driving side	Left
Why visit?	Beaches Nature Nightlife
Tourist info	Antigua Barbuda Tourism Authority