the beach today
Long Island Guide

Dean's
Blue Hole

Long Island Deep

At 663 feet, Dean's Blue Hole is the deepest known ocean blue hole in the world — a perfect circular abyss of ink-blue water ringed by white sand and limestone cliffs, in a sheltered bay on Long Island's remote southwest coast.

Today on the Sand

loading live data…

Water Temp

84°

warm · gentle surf

UV Index

9

very high · 10am–4pm

Beach Crowd

Busy

holiday weekend

Beach Toolkit

Beach Conditions

Surf, tides & water temp

Getting Here

Long Island road access & rental

Cliff Sunset

Sunset over the abyss

Dining

Cracked conch & Long Island fish

Things to Do

Freedive, snorkel & shark dives

Events

Freediving championships & more

Pick Your Sand

north to south

Blue Hole Bay

Sheltered white-sand beach framing the blue hole

Main bay

North Cliff Jump

30-foot cliff jump into the clear outer water

North cliff

South Bay

Calm & shallow · families & snorkellers

South

Clarence Town Beach

Nearby town beach · good for day trips

10 min north

Dolphin Cruises

Open →

Compare daily sails from the marina — wild dolphins on nearly every trip.

Beyond the Beach

day trips

Clarence Town

10 min north

Long Island's capital — twin church hills and a small fishing harbour

Stella Maris Resort

30 min north

Long Island's premier resort — diving, fishing and a legendary rum bar

Columbus Point

25 min south

Where Columbus is said to have first landed in the Americas in 1492

Deadman's Cay

20 min north

Long Island's main settlement — ferry dock, food and local life

see you on the sand

Water temp, surf and UV are live from NOAA & Open-Meteo; sunset is computed locally for Dean's Blue Hole. Crowd level is a weekday/weekend estimate.

Right now at Dean's Blue Hole, the water is 85°F, surf is running 2–3 ft and the air is 81°F but feels like 86°F. Wind is 8 mph from the E and the UV index peaks at 7 (high) today. Unprotected fair skin burns in about 240 minutes right now, and the strongest stretch runs 12 PM to 3 PM.