Marine Forecasts and Observations

Map of estimated Water Temperatures
List of Water Temperature observations (at bottom of page/list)

Latest Marine Discussion:

.MARINE... Northwesterly winds gusting 20-25 kt will diminish this evening, and remain below SCA levels through Monday evening. Direction gradually becomes southeasterly then southerly. Isolated strong thunderstorms capable of producing wind gusts in excess of 35 knots and hail are possible Monday evening. A cold front moves through Monday night, then strong winds develop behind the front on Tuesday. SCA conditions are likely, with gale conditions possible Tuesday afternoon into Tuesday evening. A Gale Watch has been issued where confidence is currently medium, across parts of the northern bay and upper tidal Potomac. This situation will continue to evolve. Strong gusts could be augmented by showers as well, but confidence is currently low for many showers developing Tuesday afternoon. Winds may lessen slightly Tuesday night, but it's not out of the question they could remain near gale force. Gusty northwest winds are expected in the wake of a cold front Tuesday, with small craft advisories likely. Winds diminish overnight with small craft advisories possible in the southern portions of the waters through Thursday morning. Update as of: 336 PM EDT Sun Apr 13 2025