Climate Overview
The climate in Old Harbour is hot. The average annual temperature is 26°C and approximately 892mm of precipitation falls per year. October is the wettest month, receiving around 196mm of rainfall. Old Harbour is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are February, January, March, when temperatures can drop to 22°C.
Temperature
Old Harbour has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is August, when average highs reach 31°C and the mean temperature sits around 28°C. February is the coolest month, with minimum temperatures around 22°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows.
Precipitation
Old Harbour is a moderately rainy area, receiving approximately 892mm of precipitation annually, which averages out to around 74mm per month. The wettest month is October, averaging 196mm of rainfall. September and November also tend to see above-average precipitation. The driest month is February, with just 19mm. That's 177mm less than October, the wettest month. 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.
Wind
Old Harbour is relatively calm, with an average annual wind speed of 11km/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 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 9km/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 Old Harbour, which began on September 23, 2026. Old Harbour 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 31°C, while the coldest stretch bottoms out in February near 22°C. Winter is next, beginning on December 21, 2026 (87 days from now).
Spring
Temperatures range from 23 to 29°C. Precipitation is moderate at around 204mm for the season, averaging 68mm per month. Winds are generally light, averaging 11km/h. Light layers work well as temperatures warm through the season. It is a great time to be outdoors.
Summer
Temperatures range from 25 to 31°C. Precipitation is moderate at around 200mm for the season, averaging 67mm per month. Winds are generally light, averaging 13km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 30°C. Rainfall is heavy, totalling around 428mm across the season with a monthly average of 143mm. Winds are generally light, averaging 9km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 22 to 28°C. Rainfall is relatively light, with around 60mm over the season and a monthly average of 20mm. Winds are generally light, averaging 11km/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 Old Harbour is during January and February, when the weather is most comfortable for travellers. During these months, average temperatures hover around 25°C with modest rainfall averaging 19mm per month. By contrast, August can be uncomfortably hot with temperatures reaching 31°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
The table below shows monthly climate averages for Old Harbour 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.
