Monthly weather forecast and climate
Old Harbour, Jamaica

The best months for a swim in Old Harbour, Jamaica, are January through December, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.

The perfect water temperature of 27.3°C (81.1°F) makes January a great period for swimming and other water activities in Old Harbour, Jamaica. In January, the average sea temperature is 27.3°C (81.1°F). Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable. Weather in January »

The ideal sea water temperature of 27°C (80.6°F) makes February in Old Harbour, Jamaica, the best time for swimming and other water activities. February is the month with the coldest seawater, with an average sea temperature of 27°C (80.6°F). Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. Weather in February »

The ideal sea water temperature of 27.3°C (81.1°F) makes March in Old Harbour, Jamaica, the best time for swimming and other water activities. In March, the average sea temperature is 27.3°C (81.1°F). Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods. Weather in March »

The perfect water temperature of 27.8°C (82°F) makes April a great period for swimming and other water activities in Old Harbour, Jamaica. In Old Harbour, Jamaica, the average seawater temperature is 27.8°C (82°F). Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods. Weather in April »

An excellent water temperature of 28.2°C (82.8°F) makes May in Old Harbour, Jamaica, a prime for swimming and other water activities. In Old Harbour, the average seawater temperature is 28.2°C (82.8°F). Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods. Weather in May »

An excellent water temperature of 28.6°C (83.5°F) makes June in Old Harbour, Jamaica, a prime for swimming and other water activities. In June, the average sea temperature is 28.6°C (83.5°F). Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. Weather in June »

An excellent water temperature of 28.8°C (83.8°F) makes July in Old Harbour, Jamaica, a prime for swimming and other water activities. In Old Harbour, the average seawater temperature in July is 28.8°C (83.8°F). Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. Weather in July »

An excellent water temperature of 29.5°C (85.1°F) makes August in Old Harbour, Jamaica, a prime for swimming and other water activities. In Old Harbour, the average water temperature is 29.5°C (85.1°F). Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods. Weather in August »

The perfect water temperature of 29.7°C (85.5°F) makes September a great period for swimming and other water activities in Old Harbour, Jamaica. September is the month with the warmest seawater, with an average sea temperature of 29.7°C (85.5°F). Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable. Weather in September »

An excellent water temperature of 29.3°C (84.7°F) makes October in Old Harbour, Jamaica, a prime for swimming and other water activities. In Old Harbour, Jamaica, the average seawater temperature is 29.3°C (84.7°F). Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable. Weather in October »

The ideal sea water temperature of 29.1°C (84.4°F) makes November in Old Harbour, Jamaica, the best time for swimming and other water activities. In November, the average sea temperature is 29.1°C (84.4°F). Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods. Weather in November »

The ideal sea water temperature of 28.3°C (82.9°F) makes December in Old Harbour, Jamaica, the best time for swimming and other water activities. In Old Harbour, the average seawater temperature is 28.3°C (82.9°F). Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable. Weather in December »

When is the sea coldest in Old Harbour?

With an average sea temperature of 27°C (80.6°F), February is the month with the coldest seawater in Old Harbour, Jamaica.

When are the longest days in Old Harbour?

With an average of 13.2h of daylight, June has the longest days of the year in Old Harbour.

What is the month with the warmest sea water in Old Harbour?

With an average sea temperature of 29.7°C (85.5°F), September is the month with the warmest seawater in Old Harbour.

What is the month with the shortest days in Old Harbour?

The month with the shortest days is December, with an average of 11.1h of daylight.
Average sea temperature - Old Harbour, Jamaica

The best month for swimming (with the highest average sea temperature) is September (29.7°C).
The coldest month (with the lowest average sea temperature) is February (27°C).

Average daylight - Old Harbour, Jamaica

The month with the longest days is June (Average daylight: 13.2h).
The month with the shortest days is December (Average daylight: 11.1h).