Cuba — Sea Water Temperature and Annual Ranges

Sea Water Temperature Along the Coast

Places with the Warmest Sea Water Today

The Most Popular Seaside Places

Coastal Seas and Oceans

Water Temperature and Swimming Overview

Water Temperature Trends

Cuba’s coastal waters are among the warmest in the Caribbean and remain inviting through the year. Typical sea surface temperatures along Cuba’s shores range from about 24–26 °C (75–79 °F) in the coolest winter months of December to February, rising to roughly 28–30 °C (82–86 °F) in the peak summer and early autumn months of June to September. Spring and autumn generally sit between these extremes, around 25–27 °C (77–81 °F) in spring and 27–29 °C (81–84 °F) in autumn. Local variations occur between the northern Gulf-facing coast, the southern Caribbean-facing coast, and more enclosed bays, but overall the water remains warm enough for comfort for most swimmers throughout the year.

Swimming Conditions

Swimming is widely allowed and popular along Cuba’s many beaches, thanks to consistently warm temperatures, shallow sandy shorelines, and extensive coral reefs that support snorkeling and diving. Public beaches are generally open year-round, though temporary closures can occur for practical reasons such as pollution events near urban ports, dangerous rip currents, or during storm and hurricane conditions—most commonly from August to November. Infrastructure and lifeguard presence vary by location, so visitors are advised to heed local signage and guidance. The combination of warm water and diverse marine life makes Cuba a favorable destination for recreational swimming, water sports, and underwater exploration for much of the year, while occasional weather or environmental concerns may periodically restrict access for safety or conservation reasons.