Caribbean Weather in August

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Information on the weather in August for cities and beach towns throughout the Caribbean has been pulled together here.

The August temperatures and rainfall given in the table below allow you to compare the climate for places on two dozen islands. The monthly averages are based on historical weather records.

These temperatures are in °F. You can also view the temperatures in °C.

Temperature

Although normally one of the hottest months for most Caribbean islands, August is only a few degrees warmer than the coolest months of the year. The ocean moderates island temperatures.

Ocean waters are also at their warmest in August with an average of around 83 degrees Fahrenheit throughout the Caribbean Sea.

Rain

August weather in the Caribbean builds up for the rainy season. This is the wettest month of the year for Nassau in the Bahamas and Port of Spain in Trinidad. It's even rainier yet on Martinique and Dominica.

Hurricanes

Hurricane activity grows in August. The greatest chances of encountering a hurricane this month are on eastern Jamaica, Haiti, and the eastern Caribbean islands, such as Guadeloupe. Major storms in August most commonly affect Cuba and the Bahamas.

Hurricanes aren't expected in the southern Caribbean. The region from Aruba to Tobago falls outside the Atlantic hurricane path.

Caribbean weather in August: average daily temperature and monthly rainfall
Temperature °F Island Place Total Rainfall
High Low Inches Days
88 78 Antigua St John's 4.0 13
91 80 Aruba Beatrix Airport 1.0   5
89 80 Bonaire Flamingo Airport 1.4   4
91 75 Bahamas Nassau 9.3 19
86 77 Barbados Bridgetown 2.9   –
92 73 Cayman Islands 6.4 18
89 75 Cuba Havana 3.9   9
90 79 Curaçao Hato Airport 1.6   5
87 76 Dominica Melville Hall Airport 9.6   –
87 77 Dominican Republic Punta Cana 4.1 10
89 75 Guadeloupe Pointe-a-Pitre 7.8   –
91 76 Jamaica Kingston 3.9   9
87 75 Martinique Lamentin 9.9 21
89 78 Puerto Rico San Juan 5.5 19
88 80 Saba The Bottom 3.0   6
88 78 St. Barthelemy Gustavia 4.2 12
88 77 St. Croix (US VI) Christiansted 3.0 14
88 77 St. Eustatius Oranjestad 4.2 12
88 76 St. John (US VI) Cruz Bay 3.8 16
90 78 St. Kitts Basseterre 3.4   –
87 77 St. Lucia Vieux Fort 6.2 21
89 79 St. Maarten Princess Juliana AP 3.9 14
90 78 St. Thomas (US VI) Charlotte Amalie 3.7 15
89 73 Trinidad Port of Spain 9.6 19
87 75 Tobago Scarborough 6.4 15
References

NOAA. National Weather Service. National Hurricane Center.

NOAA. Ocean Climate Laboratory. World Ocean Atlas 2009.

Rainfall and temperature data come from each island's meteorological organization.

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Average Weather

Temperature & Rainfall

WEATHER AVERAGES
Weather Extremes