Grenada — Sea Water Temperature and Annual Ranges
Up-to-date sea water temperatures for the coasts of Grenada. Learn about today’s conditions, monthly averages, and how the surrounding seas and oceans vary by season. We find every place where you can swim and show you the water temperature there today and throughout the year.
Sea Water Temperature Along the Coast
Chart of Average Temperature Changes Over the Last 60 Days
Places with the Warmest Sea Water Today
The Most Popular Seaside Places
Coastal Seas and Oceans
Water Temperature and Swimming Overview
Regions and Map
Water Temperature Trends
Grenada, a warm Caribbean island, has pleasantly warm coastal waters year-round. Sea temperatures along the sea coast typically range from about 26–30 °C (79–86 °F), with the coolest months in late winter (January to March) averaging around 26–27 °C (79–81 °F) and the warmest months in late summer and early autumn (August to October) rising to roughly 29–30 °C (84–86 °F). Seasonal variation is modest because of the island’s tropical location; even in the coolest period the water feels mild and comfortable for most swimmers. Local bays and sheltered beaches on the leeward Caribbean side can be slightly warmer and calmer than the Atlantic-facing shores, where the sea can feel a touch cooler when winds pick up.
Swimming Conditions
Swimming is widely practiced and generally allowed around Grenada’s beaches, and the warm temperatures make it pleasant for casual bathing, snorkeling, and diving throughout the year. Conditions for safe swimming depend on location and weather: many tourist beaches have gentle surf and clear water ideal for snorkeling around reefs, while exposed Atlantic-facing beaches may develop strong currents, surf, or rip tides—especially during storms or the rainy/hurricane season (June–November). Heavy rainfall can also temporarily affect water clarity and nearshore quality due to runoff. Lifeguards are not present at all beaches, so swimmers should heed local advice, posted warnings, and avoid swimming alone or in rough conditions. Overall, Grenada’s warm coastal waters support a long swimming season, with occasional weather-related restrictions for safety.