Green Turtle Cay tide times

Green Turtle Cay sits at the northern end of the main Abaco cay chain, separated from the Great Abaco mainland by the shallow Sea of Abaco and connected to the ferry dock at Treasure Cay on the mainland by a short water-taxi run. The settlement of New Plymouth on the cay's southwest harbour is one of the most intact 18th-century Loyalist towns in the Caribbean: shingled wooden houses painted in pastels, hand-laid stone walls, a small grid of sand-and-shell streets, and an Albert Lowe Museum that documents the island's shipbuilding and Loyalist history. The town has been continuously inhabited since around 1783, when British Loyalists who refused to remain in the newly independent United States settled the Abacos.

The tidal regime at Green Turtle Cay is mixed semidiurnal with a mean range of roughly 0.7 to 1.0 m — at the larger end of the Abaco pattern, reflecting the cay's northerly position and slightly stronger Atlantic tidal influence. Two unequal highs and two unequal lows each day; the diurnal inequality is real and means the two daily highs differ in height by 0.1 to 0.3 m on most days. For bonefishing — the defining sport of Green Turtle Cay's backcountry — the flooding tide is the operational signal: bonefish move onto the tidal flats north and west of the cay as the water rises, and retreat to the tidal channels on the ebb. The back-harbour flats between Green Turtle Cay and the Abaco mainland, north toward Manjack Cay and west into the uncharted shoals of the northern Sea of Abaco, are among the least-pressured bonefish habitat in the Bahamas. The Bahamian Department of Meteorology references NOAA for tidal data; predictions on this page come from Open-Meteo Marine, a gridded global ocean model, accurate to approximately ±45 min and ±0.2–0.3 m.

For bonefish guides based at Green Turtle Cay, the tide table is the first thing checked in the morning. The fish arrive on the flat edges when the water has risen roughly 0.2 to 0.3 m above the mean low, which typically occurs 30 to 45 minutes after the predicted low water. The feeding window runs until the flat depth exceeds about 0.5 m — at deeper water the fish scatter rather than concentrating along the shallow edges where they are visible and catchable. On a 0.8 m range day, this gives a productive window of two to three hours per flood. With two flooding cycles in a mixed semidiurnal day, experienced guides can plan two flat sessions.

For paddlers, the back-harbour and north-cay flats of Green Turtle are exceptional kayak and paddleboard terrain. The water is clear enough to see the bottom at 1.5 m depth in calm conditions; the bonefish and small sharks visible in a foot of water over the turtle-grass flats require silent approach and slow movement. The flats north of the cay, toward Manjack Cay, are accessible by paddling north through the protected harbour. Wind is the primary planning factor: the dominant easterly trade makes northward paddling easiest in the morning before the sea breeze builds.

Beach access on Green Turtle Cay divides between the calm, turquoise harbour side and the ocean-facing Atlantic beaches on the eastern shore. The Atlantic-side beaches are reached by golf cart or on foot across the narrow cay. Gillam Bay on the southeast faces the Sea of Abaco and provides calm water for families with children. The ocean-side beaches face northeast into the Atlantic trade-wind swell, with better body-surfing conditions but less shelter.

New Plymouth's historic buildings make it a subject for architecture and heritage photography, though the scale is intimate and best on foot in the early morning before day visitors arrive. The harbour in afternoon light, with the traditional Abaco dinghies and working boats alongside the town dock, is the classic framing. The tidal flats north of the cay at low water — wide, white, barely covered with an inch of brilliant turquoise water — are the signature landscape of the northern Abacos.

Predictions on this page come from Open-Meteo Marine, a gridded global ocean model. Accuracy is typically ±45 min and ±0.2–0.3 m. For navigation in the northern Abaco waters, use current NOS charts and NOAA harmonic data.