Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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698 FZUS51 KLWX 311735 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 135 PM 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. ANZ500-010800- 135 PM 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 by late Thursday. A Small Craft Advisory may be needed for portions of the waters on Wednesday night into Thursday due to southerly channeling. $$ ANZ535-010800- Tidal Potomac from Key Bridge to Indian Head- 135 PM EDT Sun Aug 31 2025 .THIS AFTERNOON...NE winds 5 kt. Waves less than 1 ft. .TONIGHT...NE winds around 5 kt. Waves 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds around 5 kt. Waves 1 ft. .TUE...NE winds around 5 kt. Waves 1 ft. .TUE NIGHT...S winds around 5 kt. Waves 1 ft or less. .WED...S winds around 5 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ536-010800- Tidal Potomac from Indian Head to Cobb Island- 135 PM EDT Sun Aug 31 2025 .THIS AFTERNOON...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 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 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ537-010800- Tidal Potomac from Cobb Island to Smith Point- 135 PM EDT Sun Aug 31 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH MONDAY MORNING... .THIS AFTERNOON...NE winds 10 kt. Waves 1 ft. .TONIGHT...NE winds 5 to 10 kt with gusts to 20 kt. Waves 2 ft. .MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .MON NIGHT...NE winds 10 to 15 kt. Waves 2 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SE winds 5 kt. Waves less than 1 ft. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. $$ ANZ530-010800- Chesapeake Bay north of Pooles Island- 135 PM EDT Sun Aug 31 2025 .THIS AFTERNOON...NE winds 5 kt. Waves less than 1 ft. .TONIGHT...NE winds around 5 kt. Waves flat. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft or less. .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. Showers likely with a chance of tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-010800- Chesapeake Bay from Pooles Island to Sandy Point- 135 PM EDT Sun Aug 31 2025 .THIS AFTERNOON...NE winds 10 kt. Waves 1 ft. .TONIGHT...E winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...E winds 10 to 15 kt...becoming NE 5 kt after midnight. Waves 1 ft. .TUE...NE winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds 5 kt. Waves flat. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-010800- Patapsco River including Baltimore Harbor- 135 PM EDT Sun Aug 31 2025 .THIS AFTERNOON...NE winds 10 kt. Waves 1 ft. .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 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. $$ ANZ539-010800- Chester River to Queenstown MD- 135 PM EDT Sun Aug 31 2025 .THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft. .TONIGHT...E winds 5 kt. Waves less than 1 ft. .MON...NE winds 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft or less. .TUE...NE winds 5 kt. Waves less than 1 ft. .TUE NIGHT...SE winds around 5 kt. Waves flat. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. Showers likely through the night. $$ ANZ532-010800- Chesapeake Bay from Sandy Point to North Beach- 135 PM EDT Sun Aug 31 2025 .THIS AFTERNOON...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...E winds 10 to 15 kt. Waves 1 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 5 kt. Waves flat. .WED...S winds 5 to 10 kt. Waves 1 ft or less... building to 2 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft...building to 2 to 3 ft. A chance of showers in the afternoon. Showers likely through the night. $$ ANZ540-010800- Eastern Bay- 135 PM EDT Sun Aug 31 2025 .THIS AFTERNOON...N winds 10 kt. Waves 1 ft. .TONIGHT...NE winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft. .TUE...N winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SE winds 5 kt. Waves flat. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 ft. Showers likely through the night. $$ ANZ533-010800- Chesapeake Bay from North Beach to Drum Point- 135 PM EDT Sun Aug 31 2025 .THIS AFTERNOON...N winds 10 kt. Waves 1 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 10 to 15 kt. Waves 1 to 2 ft. .TUE...N winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SE winds 5 kt. Waves less than 1 ft. .WED...S winds 5 to 10 kt. Waves 1 ft or less... building to 2 ft. .THU...S winds 15 to 20 kt. Waves 1 to 2 ft...building to 2 to 3 ft. A chance of showers through the night. $$ ANZ541-010800- Choptank River to Cambridge MD and the Little Choptank River- 135 PM EDT Sun Aug 31 2025 .THIS AFTERNOON...N winds 10 kt. Waves 1 ft. .TONIGHT...NE winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 10 to 15 kt. Waves 1 ft. .MON NIGHT...NE winds 10 to 15 kt. Waves 1 ft. .TUE...N winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SE winds 5 kt. Waves flat. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. $$ ANZ542-010800- Patuxent River to Broomes Island MD- 135 PM EDT Sun Aug 31 2025 .THIS AFTERNOON...N winds 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...SE 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. $$ ANZ534-010800- Chesapeake Bay from Drum Point to Smith Point- 135 PM EDT Sun Aug 31 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH MONDAY MORNING... .THIS AFTERNOON...N winds 10 kt. Waves 2 ft. .TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...N winds 5 to 10 kt. Waves 1 to 2 ft. .TUE NIGHT...SE winds 5 kt. Waves less than 1 ft. .WED...S winds 5 to 10 kt. Waves 1 to 2 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft...building to 3 ft. A chance of showers through the night. $$ ANZ543-010800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 135 PM EDT Sun Aug 31 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH MONDAY MORNING... .THIS AFTERNOON...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...SE winds 5 kt. Waves less than 1 ft. .WED...W winds 5 kt...becoming S. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. $$