Belize — Sea Water Temperature and Annual Ranges
Up-to-date sea water temperatures for the coasts of Belize. 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
Belize’s Caribbean coast is known for consistently warm sea temperatures that make swimming pleasant most of the year. Typical surface water temperatures range roughly from about 25–30 °C (77–86 °F) depending on season and location. During the winter months (December–February) waters commonly sit around 25–27 °C (77–81 °F). In spring and early summer (March–June) temperatures rise to roughly 27–29 °C (81–84 °F), while the warmest period in mid to late summer (July–September) can see surface waters near 28–30 °C (82–86 °F). Temperatures generally ease back in the fall (October–November) to the high 20s °C (around 80–84 °F). Variations occur near offshore reefs and deeper channels, where currents and upwelling can produce slightly cooler or clearer water.
Swimming Conditions
Swimming is widely allowed and popular along Belize’s beaches, cayes and atolls, and the warm, clear conditions also support excellent snorkeling and diving around the Belize Barrier Reef. That said, local conditions matter: strong currents, tides and seasonal storms—especially during the June–November hurricane season—can make swimming unsafe at times, and rains can reduce visibility and water quality near river mouths. Many popular spots are sheltered and suitable for casual swimming year-round, but it’s sensible to follow local advisories, swim at monitored beaches when possible, and take care around coral and marine life. Overall, the coastal water temperatures are inviting for swimmers and underwater enthusiasts for most months of the year.