Dean's Blue Hole
Area World's deepest marine blue hole near Long Island
Off Long Island in the Bahamas, Dean’s Blue Hole is a deep vertical sink in clear Caribbean water. Freedivers, sport divers and snorkelers visit for deep-water training, competitions and boat trips from Clarence Town.
Dean’s Blue Hole is a marine sinkhole on Long Island in the Bahamas, located near the settlement of Clarence Town, known for its exceptionally deep, steep-walled blue hole. The hole plunges straight down from a protective rim and connects to the ocean.
The feature is noted for its great depth, vertical walls and clear water, which have made it a destination for freedivers, snorkelers and photographers. The sheltered mouth and deep blue column of water create striking visual contrast with the surrounding reef and shoreline.
The feature formed through coastal karst and sea-level changes that flooded a collapse sinkhole; over time it became a singular deep blue hole adjacent to shallow reef flats. Its consistent depth and protected conditions have established it as a recurrent site for freediving training and competitions.
Dean’s Blue Hole lies on the west coast of Long Island, the Bahamas, a short distance from the small settlement of Clarence Town and is reachable by local roads and short boat trips along the island’s coast.
- Depth: The vertical sinkhole reaches roughly 202 metres (about 663 feet) in depth, making it one of the deepest known saltwater blue holes in the world.
- Freediving hub: The site is a global centre for freediving and frequently hosts international freediving events and training sessions.
How to Get to Dean's Blue Hole #
Dean’s Blue Hole is located near Clarence Town on Long Island. Visitors typically fly into North Eleuthera or Nassau and connect by domestic flights or ferries to Long Island; local taxis and short drives take visitors from Clarence Town to the blue hole area.
Tips for Visiting Dean's Blue Hole #
- If planning to watch or study freediving, check event schedules-Dean's Blue Hole hosts international competitions.
- Use a local boat operator to reach the blue hole safely for snorkeling or diving; currents can be deceptively strong offshore.
- Sunsets here are spectacular and fewer people remain after mid- to late afternoon.
Best Time to Visit Dean's Blue Hole #
Winter months are prime for stable conditions; avoid the peak hurricane season for safety.
Weather & Climate near Dean's Blue Hole #
Dean's Blue Hole's climate is classified as Tropical Savanna - Tropical Savanna climate with hot summers (peaking in August) and warm winters (coldest in January). Temperatures range from 19°C to 32°C. Moderate rainfall (922 mm/year).
January
January is mild with highs of 25°C and lows of 19°C. Moderate rainfall (50 mm).
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February
February is mild with highs of 26°C and lows of 20°C. Moderate rainfall (35 mm) and mostly sunny skies.
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March
March is warm with highs of 27°C and lows of 21°C. Moderate rainfall (30 mm).
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April
April is warm with highs of 28°C and lows of 22°C. Moderate rainfall (48 mm).
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May
May is warm with muggy conditions (dew point 22°C). Regular rainfall (96 mm) and partly cloudy skies.
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June
June is hot, feeling like 30°C due to high humidity. Significant rainfall (111 mm) and partly cloudy skies.
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July
July is hot, feeling like 32°C due to high humidity. Moderate rainfall (55 mm).
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August
August is the hottest month, feeling like 33°C due to high humidity. Regular rainfall (81 mm).
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September
September is hot, feeling like 32°C due to high humidity. Significant rainfall (105 mm) and partly cloudy skies.
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October
October is warm with muggy conditions (dew point 24°C). The wettest month with heavy rain (173 mm) and partly cloudy skies.
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November
November is warm with highs of 28°C and lows of 23°C. Regular rainfall (85 mm), partly cloudy skies, and breezy conditions.
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December
December is warm with highs of 27°C and lows of 22°C. Moderate rainfall (53 mm).
