Climate Overview
The climate in Port Antonio is hot. The average annual temperature is 26°C and approximately 1476mm of precipitation falls per year. Port Antonio receives a notable amount of rainfall throughout the year, including during its driest month. Port Antonio is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, August, July. The coldest months are February, January, March, when temperatures can drop to 23°C.
Temperature
Port Antonio has relatively stable temperatures year-round, staying within a 6°C range. The warmest month is September, when average highs reach 29°C and the mean temperature sits around 27°C. February is the coolest month, with minimum temperatures around 23°C and an average of 24°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows.
Precipitation
Port Antonio is a fairly wet location, receiving approximately 1476mm of precipitation annually, which averages out to around 123mm per month. The wettest month is October, averaging 254mm of rainfall. November and May also tend to see above-average precipitation. The driest month is July, with just 81mm. That's 173mm less than October, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.
Wind
Port Antonio is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months.
Seasons
87 days until Winter
It is currently autumn in Port Antonio, which began on September 23, 2026. Port Antonio 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 September at around 29°C, while the coldest stretch bottoms out in February near 23°C. Winter is next, beginning on December 21, 2026 (87 days from now).
Spring
Temperatures range from 23 to 28°C. Rainfall is heavy, totalling around 347mm across the season with a monthly average of 116mm. Winds are generally light, averaging 13km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 25 to 29°C. Precipitation is moderate at around 286mm for the season, averaging 95mm per month. Winds are generally light, averaging 14km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 25 to 29°C. Rainfall is heavy, totalling around 553mm across the season with a monthly average of 184mm. Winds are generally light, averaging 11km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 23 to 26°C. Precipitation is moderate at around 290mm for the season, averaging 97mm per month. Winds are generally light, averaging 13km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Port Antonio is during January, February and March, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 88mm per month. By contrast, September can be uncomfortably hot with temperatures reaching 29°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.
Monthly Climate Data
The table below shows monthly climate averages for Port Antonio 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.
