Potomac River Tides the Potomac is tidal as far up as D.C Tides POTOMAC RIVER TIDE CHART Tides www.saltwatertides.com/dynamic.dir/potomacsites.html http://www.saltwatertides.com/dynamic.dir/potomacsites.html SALTWATER TIDES - Potomac River Breton Bay FOR TIDES this website FOR TIDES Tides Tides Tides http://www.saltwatertides.com/dynamic.dir/potomacsites.html Salt Water Tides http://www.saltwatertides.com/dynamic.dir/potomacsites.html Leonardtown the Potomac is tidal as far up as D.C TIDES