Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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892 FZUS51 KLWX 311134 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 733 AM EDT Sun Aug 31 2025 Tidal Potomac River and Maryland portion of Chesapeake Bay. Forecasts of wave heights do not include effects of wind direction relative to tidal currents. Expect higher waves when winds are blowing against the tidal flow. Waves flat where waters are iced over. ANZ500-312000- 733 AM EDT Sun Aug 31 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... High pressure north of the area will continue to influence the area into the middle of the week. The next cold front approaches the waters Thursday. A Small Craft Advisory may be needed for portions of the waters tonight into Monday and Wednesday night into Thursday. $$ ANZ535-312000- Tidal Potomac from Key Bridge to Indian Head- 733 AM EDT Sun Aug 31 2025 .TODAY...NE winds 5 kt. Waves less than 1 ft. .TONIGHT...NE winds around 5 kt. Waves 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds around 5 kt. Waves 1 ft or less. .TUE...NE winds around 5 kt. Waves 1 ft. .TUE NIGHT...S winds around 5 kt. Waves 1 ft. .WED...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ536-312000- Tidal Potomac from Indian Head to Cobb Island- 733 AM EDT Sun Aug 31 2025 .TODAY...NE winds 5 to 10 kt. Waves 1 ft. .TONIGHT...NE winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds around 5 kt. Waves 1 ft. .TUE NIGHT...S winds around 5 kt. Waves 1 ft. .WED...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ537-312000- Tidal Potomac from Cobb Island to Smith Point- 733 AM EDT Sun Aug 31 2025 .TODAY...NE winds 10 kt. Waves 1 ft. .TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .MON NIGHT...NE winds 10 to 15 kt. Waves 2 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 5 kt. Waves less than 1 ft. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. $$ ANZ530-312000- Chesapeake Bay north of Pooles Island- 733 AM EDT Sun Aug 31 2025 .TODAY...NE winds 5 to 10 kt. Waves 1 ft. .TONIGHT...E winds around 5 kt. Waves 1 ft or less. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft or less. .TUE...N winds around 5 kt. Waves flat. .TUE NIGHT...S winds around 5 kt. Waves flat. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-312000- Chesapeake Bay from Pooles Island to Sandy Point- 733 AM EDT Sun Aug 31 2025 .TODAY...NE winds 10 kt. Waves 1 ft. .TONIGHT...E winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds 5 kt. Waves less than 1 ft. .WED...S winds 10 to 15 kt. Waves 1 ft or less... building to 2 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. A chance of showers and tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-312000- Patapsco River including Baltimore Harbor- 733 AM EDT Sun Aug 31 2025 .TODAY...NE winds 5 to 10 kt. Waves 1 ft or less. .TONIGHT...NE winds 5 kt. Waves less than 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds around 5 kt. Waves flat. .TUE NIGHT...S winds around 5 kt. Waves flat. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 ft. A chance of showers in the afternoon. A chance of showers and tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-312000- Chester River to Queenstown MD- 733 AM EDT Sun Aug 31 2025 .TODAY...NE winds 5 to 10 kt. Waves 1 ft. .TONIGHT...E winds 5 kt. Waves less than 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds around 5 kt. Waves 1 ft or less. .TUE NIGHT...S winds around 5 kt. Waves flat. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ532-312000- Chesapeake Bay from Sandy Point to North Beach- 733 AM EDT Sun Aug 31 2025 .TODAY...NE winds 10 kt. Waves 1 ft. .TONIGHT...E winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 10 kt. Waves 2 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 5 kt. Waves less than 1 ft. .WED...S winds 10 to 15 kt. Waves 1 to 2 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. $$ ANZ540-312000- Eastern Bay- 733 AM EDT Sun Aug 31 2025 .TODAY...NE winds 10 kt. Waves 1 ft. .TONIGHT...E winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds around 5 kt. Waves 1 ft or less. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 ft. A chance of showers through the night. $$ ANZ533-312000- Chesapeake Bay from North Beach to Drum Point- 733 AM EDT Sun Aug 31 2025 .TODAY...N winds 10 kt. Waves 1 to 2 ft. .TONIGHT...NE winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 10 to 15 kt. Waves 2 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 to 2 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 5 kt. Waves less than 1 ft. .WED...S winds 10 to 15 kt. Waves 1 to 2 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. $$ ANZ541-312000- Choptank River to Cambridge MD and the Little Choptank River- 733 AM EDT Sun Aug 31 2025 .TODAY...N winds 10 kt. Waves 1 ft. .TONIGHT...NE winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...N winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 5 kt. Waves less than 1 ft. .WED...S winds 10 to 15 kt. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. $$ ANZ542-312000- Patuxent River to Broomes Island MD- 733 AM EDT Sun Aug 31 2025 .TODAY...N winds 5 to 10 kt. Waves 1 ft. .TONIGHT...NE winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds around 5 kt. Waves 1 ft. .WED...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 10 to 15 kt. Waves 1 ft. A chance of showers through the night. $$ ANZ534-312000- Chesapeake Bay from Drum Point to Smith Point- 733 AM EDT Sun Aug 31 2025 .TODAY...NE winds 10 kt. Waves 1 to 2 ft. .TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .MON NIGHT...NE winds 10 to 15 kt. Waves 2 ft. .TUE...N winds 5 to 10 kt. Waves 1 to 2 ft. .TUE NIGHT...S winds 5 kt. Waves less than 1 ft. .WED...S winds 10 to 15 kt. Waves 1 to 2 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. $$ ANZ543-312000- Tangier Sound and the inland waters surrounding Bloodsworth Island- 733 AM EDT Sun Aug 31 2025 .TODAY...NE winds 10 kt. Waves 1 ft. .TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .MON NIGHT...NE winds 10 to 15 kt. Waves 1 ft. .TUE...N winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 5 kt. Waves less than 1 ft. .WED...SW winds 5 to 10 kt...becoming S. Waves 1 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. $$