From Active Captain: (These are pretty old reports)

Entrance to Savannah Bay

Last Updated:1/22/2008
18°27'59.7" N, 64°25'33.4" W
Summary
Inlet
Savannah Bay is well protected by a nice reef system lying 700 feet or so off the shore. Stay well to the right when entering. You will feel like you are too close to the cliffs on your right. Put someone on the bow to watch for coral heads. Not really as sketchy as it might appear. Well worth the touchy entrance to enjoy the awesome anchorage.

Savannah Bay

Last Updated:9/18/2018
18°27'57.4" N, 64°25'12.4" W
Summary
Anchorage
Small to medium sized anchorage. Easily holds 6 boats. Good to moderate holding in sand. 15 feet of water typical. No mooring balls makes it a nice escape from the charter crowds. Good snorkeling within swimming distance of the boat. INCREDIBLE, deserted beaches. Probably a better anchorage during a summer weather pattern when the winds are out of the SE, good get rolly when out of the NE


Chuck W.