Plizio Visual Lab

Caribbean Sea (Belize)

Plizio editorial teamUpdated: Jun 2026Data Sources

Sea

Weather…

The Caribbean Sea off the coast of Belize is an aquatic wonderland and the centerpiece of the country's tourism and fishing industries. It is home to the Belize Barrier Reef, the second-largest coral reef system in the world and a UNESCO World Heritage site. This complex ecosystem consists of hundreds of sand and mangrove islands (cayes), atolls, and an incredible diversity of marine life. Places like the Great Blue Hole, a giant underwater sinkhole, attract divers from all over the globe. The waters are rich in corals, fish, sea turtles, sharks, and dolphins. The sea plays a crucial role in Belize's economy, not only through tourism but also through commercial fishing, especially for lobster and conch. Protecting this fragile ecosystem from the impacts of climate change and pollution is one of the country's greatest challenges.

Location: Belize
Nearby: Turneffe Atoll (7 km)

Best time to visit & climate

The most pleasant time to visit is Feb–Apr.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	25	25	26	27	28	28	28	28	28	27	26	25
Rain mm	115	58	46	34	127	224	152	167	184	250	184	132

📋 Practical info

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Getting there

The expansive coastal waters are accessible from numerous mainland towns, small fishing villages, and offshore islands. Boat charters and public ferries are the standard modes of transportation for exploring the ocean.

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Best season

The calmest and clearest conditions for reef exploration generally occur during the dry winter and spring months. The hurricane season in late summer can bring heavy swells, significantly reducing visibility and boat safety.

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Terrain & paths

The marine environment transitions from shallow, sandy coastal shelves to the complex, biologically diverse barrier reef system. Further offshore, the underwater topography drops dramatically into much deeper ocean trenches.

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What to bring

Sun protection and motion sickness medication are vital for prolonged boat journeys on the open water. Snorkeling or diving gear is usually provided by operators, but bringing a rash guard is strongly advised.

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Parking

Vehicles are safely parked at mainland coastal marinas or secured hotel lots prior to embarking on island-hopping ferries. You will not need a personal vehicle once you transition to the offshore islands or boats.

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Safety

Always pay close attention to weather forecasts, as ocean squalls can develop rapidly. When participating in water sports, strictly follow your divemaster's instructions and maintain a respectful distance from the living reef.

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Time needed

Activities on the sea typically range from half-day snorkeling excursions to week-long sailing or diving liveaboard trips. A minimum of a full day is generally required to properly appreciate the barrier reef environment.

Geography

Coordinates

17.50000, -87.80000

Facts

The Caribbean Sea is the second largest sea in the world after the Mediterranean.
Contains the Belize Barrier Reef, the second largest barrier reef system on Earth.
The average water temperature ranges from 26°C to 29°C (79°F to 84°F).
Home to over 500 species of fish and 65 species of stony corals in Belizean waters.
The sea's salinity remains relatively constant throughout the year.
Critical habitat for endangered species like the West Indian Manatee and Hawksbill Turtle.
The deep waters east of the reef can reach depths exceeding 10,000 feet.