Climate Insights for Antigua

The climate in Antigua is warm and mild. The average annual temperature is 20°C and approximately 69mm of precipitation falls per year. October is the wettest month, receiving around 17mm of rainfall. Antigua is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, September, October. The coldest months are February, January, March, when temperatures can drop to 16°C.

Antigua has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is August, when average highs reach 25°C and the mean temperature sits around 23°C. February is the coolest month, with minimum temperatures around 16°C and an average of 17°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows.

Antigua is a quite dry location, receiving approximately 69mm of precipitation annually, which averages out to around 6mm per month. The wettest month is October, averaging 17mm of rainfall. November and February also tend to see above-average precipitation. The driest month is August, with just 1mm. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Antigua is relatively calm, with an average annual wind speed of 6km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months.

It is currently summer in Antigua, which began on June 21, 2026. Antigua is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 25°C, while the coldest stretch bottoms out in February near 16°C. Autumn is next, beginning on September 23, 2026 — 92 days from now.

The best time to visit Antigua is during January, February, March, April, May, June, July, August, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 6mm per month. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Antigua based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.