People often ask us how deep is the Chesapeake Bay. The short answer may surprise you: not very deep at all.

Quick answer: How deep is the Chesapeake Bay? On average about 21 feet, counting its tidal rivers. The deepest point is 174 feet, at a spot called The Hole, southeast of Annapolis near Bloody Point.

Contents

Average Depth

The Bay is about 21 feet deep on average, if you count its tidal rivers.[1] That is shallow for a body of water about 200 miles long.

The Deepest Spot

The deepest point is 174 feet. People call it The Hole. It is southeast of Annapolis, near Bloody Point.[2]

Why So Shallow?

The Bay is a flooded river valley. About 10,000 years ago, melting ice raised the sea. The water filled the old valley of the Susquehanna River.[1]

What It Means for Boaters

Shallow water means you must watch your charts and the tides. Wind can push water levels up or down, too.

Frequently asked questions

How deep is the Chesapeake Bay on average? About 21 feet, counting its tidal rivers.

What is the deepest part of the Chesapeake Bay? The Hole, at 174 feet, southeast of Annapolis near Bloody Point.

Is the Chesapeake Bay deep enough for big ships? Two major ports sit on the Bay: Baltimore and Hampton Roads.

References

Check the water today on our tides page.