Weather in Antigua in August

How August compares

August is the 1st warmest month of the year in Antigua and ranks 67th of 134 destinations we compare for August - see where else is hot in August. Against London's average high of 21.4°C in August, Antigua is 7.5°C warmer by day and 12.7°C warmer at night.

Daytime and night-time in August

The typical August day in Antigua peaks at 28.9°C, but that is an average: the warmest 10% of days reach 29.9°C or more. About 100% of days top 25°C and 1 in 11 pass 30°C. Nights average 26.2°C; one night in ten drops to 25.4°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 31.3°C (2020-08-15) and the coldest night 24.4°C (1994-08-05).

Rain in August

Wet (more than 8 rainy days): about 19 days with 1 mm or more, 101 mm in total. Year to year it varies a lot - the wettest August was 2010 with 211 mm, the driest 1994 with 37 mm. Humidity averages 78%, which makes the heat feel heavier than the thermometer suggests.

Sea temperature in August

The sea averages 28.6°C - warm enough to swim (22°c+). Depending on the year it ranges from 28.1°C to 28.9°C. For the warmest sea here, come in September (28.9°C).

Sunshine and daylight

Around 6.4 hours of sunshine a day (estimated from cloud cover), 12.6 hours of daylight: the sun rises about 05:51 and sets about 18:33 local time in mid-August. Average cloud cover is 49%.

Is August a good time to visit Antigua?

It is a reasonable choice: hot days but expect showers. The best months for Antigua on our scoring are March, February, April; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Expect heat that lasts into the evening

The main consideration is persistent warmth rather than extreme daytime temperatures. With humidity at 78%, plan for muggy conditions and put more active outings earlier in the day rather than at midday. Loose, lightweight clothing makes sense, and air conditioning is a sensible accommodation priority if warm nights disturb your sleep. Evenings are still warm, so do not expect stepping outside after dark to bring much cooling. The sea averages 28.6°C, making August a good fit for travellers who dislike a chilly swim. It offers a change from the heat on land, but the water is warm rather than bracing. This weather suits a relaxed pace better than a packed schedule of outdoor activity.

Leave room in your plans for rain

Rain is the catch: about 19 days receive at least 1 mm, so dry weather should not be the assumption behind every plan. That does not mean those days are wet throughout. August still averages about 6.4 hours of sunshine within 12.6 hours of daylight, leaving scope for time outdoors alongside the rain. Keep outdoor plans flexible, carry a light waterproof and have something to do under cover. Do not rely on a particular time of day being dry, as these figures do not establish a daily rain pattern. August is a reasonable choice if you can work around wet spells, but less suitable if your holiday depends on uninterrupted sunshine.