Climate and monthly weather forecast
Old Harbour, Jamaica


The climate of Old Harbour

Dominating the climatic conditions of Old Harbour, the prominent Köppen climate classification Aw, or Tropical wet and dry, is prevalent. This climatic type is significant within the geographical location of Old Harbour, Jamaica. Emphasized throughout the year, the weather in Old Harbour demonstrates consistent observational patterns, mainly encapsulated within the data sets of monthly averages.

When observing the sea temperature across the year, the fluctuations are slight, hovering between a low of 27°C (80.6°F) in February to a peak of 29.7°C (85.5°F) in September. These subtle variations indicate a relatively constant and warm sea temperature, regardless of the season. Meanwhile, the daylight hours also exhibit a subtle shift throughout the year. The shortest daylight period takes place in December, tallying 11.1 hours, and the longest in June and July with 13.2 hours. This pattern emphasizes the characteristic long sunny days associated with the tropical climate.

A striking feature of weather in Old Harbour is the consistent tropical conditions. The period from June to September sees peak sea temperatures from 28.6°C (83.5°F) to 29.7°C (85.5°F) and relatively long daylight hours, ranging from 13.1 hours to 12.7 hours.

The best time to visit Old Harbour

Given these typical weather conditions, travellers are likely to find the months from June to September as the most appealing. The reason is the combination of highest average sea temperatures, between 28.6°C (83.5°F) to 29.7°C (85.5°F), and ample daylight, ranging from 13.1 hours to 12.7 hours daily. This allows for maximum exploration and enjoyment of the seaside during these months.

The worst time to visit Old Harbour

On the contrary, the least favourable time to visit Old Harbour would essentially fall between December and February. During this period, the region experiences the shortest daylight hours, from 11.2 hours to 11.6 hours daily. Furthermore, the sea temperature drops to its lowest average, from 27.3°C (81.1°F) to 27°C (80.6°F), which may not be as comfortable for swimming or other water-based activities.

Spring weather in Old Harbour

Spring in Old Harbour commences with fluctuating sea temperatures, which increase from 27.3°C (81.1°F) in March to 28.2°C (82.8°F) by May. This period generally offers moderate sea temperatures and daylight hours, peaking at 13 hours by May. This ushers in a perfect weather climate for early visitors who prefer to avoid the more extreme summer heat, yet enjoy comfortable water temperatures and ample daylight.

Summer weather in Old Harbour

Summer is distinguishable in Old Harbour; the sea temperatures are at their maximum, between 28.8°C (83.8°F) and 29.7°C (85.5°F), from June to September. This period also has the longest daylight duration averaging at 13.1 hours in June, which decreases slightly to 12.7 hours by September. The heightened sea temperatures and long, sunny days epitomise the vivid and vibrant beach life during the summer season.

Autumn weather in Old Harbour

The transition into autumn in Old Harbour shows a decline in daylight hours and sea temperatures. Compared to the preceding months, daylight hours decrease from 12.2 hours in October to 11.3 hours in November. Similarly, sea temperatures recede from 29.3°C (84.7°F) in October to 28.3°C (82.9°F) in November. The overall retreat in sea temperature and daylight hours delineates autumn in Old Harbour.

Winter weather in Old Harbour

Winter weather in Old Harbour embodies the shortest daylight period from December to February, with the least being 11.1 hours in December, recovering slightly to 11.6 hours by February. During this period, the sea temperatures dip to their lowest average between 27.3°C (81.1°F) and 27°C (80.6°F). Despite these conditions, Old Harbour's winter months provide a warm alternative for visitors escaping colder climates elsewhere.

Weather in January

Kicking off the year, the Old Harbour weather sees a comfortable sea temperature of 27.3°C (81.1°F). The balmy weather allows for outdoor activities, while the still relatively lengthy daylight hours enhance the experience. Compared to December, the sun lingers a bit longer, providing more sunlight for beach enthusiasts. Weather in January »

Weather in February

Stepping into February, the average sea temperature in Old Harbour experiences a minor drop to 27°C (80.6°F). The city complements the cooler sea with longer daylight hours, making the month a paradise for those who love to laze on the beach under the warm sun. Weather in February »

Weather in March

The favourable weather of Old Harbour continues into March, with a slight increase in the sea temperature to 27.3°C (81.1°F). Daylight hours continue to increase, opening up more time for residents and visitors to soak in the unique sights and sounds of the city. Weather in March »

Weather in April

April ushers in a warmer average sea temperature of 27.8°C (82°F) in Old Harbour. It aligns with the lengthening daylight hours, making this month promising for numerous outdoor activities. Following a subtle transition from the chillier months, the city embraces the sunnier days and maintains a steady warmth throughout the day. Weather in April »

Weather in May

May sees a considerable jump in Old Harbour's sea temperature to 28.2°C (82.8°F). Daylight becomes even more abundant as summer approaches, leading to extended outdoor activities and vibrant evening events. The transition from April sees the tropical city warming up, gearing towards the heart of summer. Weather in May »

Weather in June

With the arrival of June, Old Harbour's sea temperature soars to a warm 28.6°C (83.5°F). The extended daylight hours still persist, staying within the summer trend and setting the stage for memorable sunset viewings. The June setting remains consistent with May, exemplifying the city's typical summer patterns. Weather in June »

Weather in July

July, the heart of summer in Old Harbour, records a mild further increase in average sea temperature to 28.8°C (83.8°F). However, a keen observer would notice a slight decrease in daylight hours as compared to June. Notwithstanding the minor change, the general weather pattern remains similar to June. Weather in July »

Weather in August

With the peak sea temperature reaching 29.5°C (85.1°F), August marks the warmest month in Old Harbour. The city, bathed in warmth, alongside fewer daylight hours compared to July, fosters a unique combination of warm nights and sunny days. Weather in August »

Weather in September

September registers the second-highest sea temperature of 29.7°C (85.5°F) in Old Harbour, only marginally cooler than August. With a further reduction in daylight hours, the weather fosters a blend of warm nights and delightful days. Weather in September »

Weather in October

After the heat peak in September, October sees a slight decline in the sea temperature to 29.3°C (84.7°F). Along with continued reduction in daylight hours, the month underscores the transition from summer to winter. The shift in weather patterns becomes increasingly noticeable through the month, bringing about a change in scenery and a variety in temperature, giving a breather from the consistent warmth of the preceding months. In Old Harbour, in October, the average water temperature is 29.3°C (84.7°F). Note: For swimming, diving, and various water activities, the temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as highly enjoyable and comfortable for extended durations without any discomfort. Weather in October »

Weather in November

A noticeable decrease happens in November, with Old Harbour's sea temperature dropping to 29.1°C (84.4°F). While the daylight hours continue to shorten, the city retains a substantial amount of warmth and light. Albeit a slight cooling trend from October, the city's tropical charm remains intact through the month. Weather in November »

Weather in December

Old Harbour rings out the year with a sea temperature of 28.3°C (82.9°F) in December. The shortest daylight hours of the year accompany the dropping temperature, gradually restoring the city’s weather to its cooler state. Despite the incoming winter period, the temperature remains congenial for outdoor pursuits. Weather in December »

Frequently asked questions

When is the sea coldest in Old Harbour?

The month with the coldest seawater is February, with an average sea temperature of 27°C (80.6°F).

When are the longest days in Old Harbour?

The month with the longest days is June, with an average of 13h and 12min of daylight.

When is the sea warmest in Old Harbour?

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

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

The month with the shortest days is December, with an average of 11h and 6min of daylight.

Is there Daylight Saving Time (DST) in Old Harbour?

Old Harbour does not utilize Daylight Saving Time (DST). EST timezone is used throughout the entire year.

Average sea temperature
Old Harbour, Jamaica

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

Average daylight - Old Harbour, Jamaica

The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).


Old Harbour, Jamaica

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