- Shelter
- NW, N, NE, W, SW
- Seabed
- mud
- Anchoring
- Allowed
Anchorage off a spoil island in Hillsborough Bay, in the upper reaches of Tampa Bay, Florida.
Guide
Approach and anchoring
Mud bottom, sheltered from north-west through south-west. Sunken Island was built from dredged material in the 1920s when the Alafia River channel was cut. Landing on the island is not allowed.
Practical
No facilities. Inter-Bay Moorings lies 2 miles east and Apollo Beach Marina 3.7 miles south.
Story
The island forms part of the Audubon Alafia Bank Sanctuary, a nesting site for roseate spoonbills, herons, egrets, ibis and brown pelicans. Boats are asked to keep clear of the shoreline during the spring nesting season.
Key facts
- Type
- Anchorage
- Coordinates
- 27.84544, -82.41654 (27°50.73'N 82°24.99'W)
- Country
- United States
- Shelter
- Sheltered from north-west, north, north-east, west, south-west winds
- Seabed
- mud
- Anchoring
- Allowed
- Boaters' rating
- 3.0/5
- Updated
- July 7, 2026
Getting there
Sunken Island lies at 27°50.73'N 82°24.99'W, that is 27.84544, -82.41654 in decimal degrees.
Boaters' reviews
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Write a reviewFrequently asked questions
Which winds is Sunken Island sheltered from?
Sunken Island is sheltered from north-west, north, north-east, west, south-west winds.
Can you anchor at Sunken Island?
Yes, anchoring is allowed at Sunken Island.
How do boaters rate Sunken Island?
Sunken Island is rated 3.0/5 by boaters on BoatMap.
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