Sombrero Light is located roughly five miles south of the eastern end of the 7-mile bridge near Marathon. It is only possible to visit by boat and it is not open to the public. A distant view is possible from the eastern (Marathon) end of the 7-mile bridge.
The lighthouse has a number of moorings for dive boats or private boats. We took the big boat out and hooked up on a mooring so I could take a look at the prop and the zincs (zincs protect the prop from electrolysis in the sea water). There was a good bit of waves and current and the water was COLD, so I didn't stay in very long.
Sombrero Light is a weather station for NOAA. You can check the
weather observations at Sombrero Key.
Latitude: 24.6267
Longitude: -81.11