Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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522 FZUS51 KLWX 312335 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 735 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- 735 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. $$ ANZ535-010800- Tidal Potomac from Key Bridge to Indian Head- 735 PM EDT Sun Aug 31 2025 .TONIGHT...NE winds 5 kt. Waves less than 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds around 5 kt. Waves 1 ft. .TUE...NE winds around 5 kt. Waves 1 ft. .TUE NIGHT...S winds around 5 kt. Waves 1 ft or less. .WED...S winds around 5 kt. Waves 1 ft. .WED NIGHT...S winds 5 kt. Waves less than 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI...SW winds around 5 kt. Waves 1 ft. A chance of showers. $$ ANZ536-010800- Tidal Potomac from Indian Head to Cobb Island- 735 PM EDT Sun Aug 31 2025 .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 around 5 kt. Waves 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning. A chance of showers in the evening. $$ ANZ537-010800- Tidal Potomac from Cobb Island to Smith Point- 735 PM EDT Sun Aug 31 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY MORNING... .TONIGHT...NE winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft. .MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .MON NIGHT...NE winds 10 to 15 kt. Waves 2 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SE winds 5 kt. Waves less than 1 ft. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. .FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning. $$ ANZ530-010800- Chesapeake Bay north of Pooles Island- 735 PM EDT Sun Aug 31 2025 .TONIGHT...NE winds 5 kt. Waves less than 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...SW winds around 5 kt. Waves 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .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. .FRI...SW winds 5 to 10 kt. Waves 1 ft. Showers likely in the morning. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-010800- Chesapeake Bay from Pooles Island to Sandy Point- 735 PM EDT Sun Aug 31 2025 .TONIGHT...E winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...E winds 10 to 15 kt...becoming NE 5 kt after midnight. Waves 1 ft. .TUE...NE winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds 5 kt. Waves flat. .WED...SW winds 5 to 10 kt. Waves 1 ft or less. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-010800- Patapsco River including Baltimore Harbor- 735 PM EDT Sun Aug 31 2025 .TONIGHT...NE winds 5 kt. Waves flat. .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. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .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. .FRI...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-010800- Chester River to Queenstown MD- 735 PM EDT Sun Aug 31 2025 .TONIGHT...E winds 5 to 10 kt. Waves 1 ft or less. .MON...NE winds 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft or less. .TUE...NE winds 5 kt. Waves less than 1 ft. .TUE NIGHT...SE winds around 5 kt. Waves flat. .WED...SW winds around 5 kt. Waves 1 ft or less. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. Showers likely through the night. .FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ532-010800- Chesapeake Bay from Sandy Point to North Beach- 735 PM EDT Sun Aug 31 2025 .TONIGHT...E 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. .WED NIGHT...S winds 10 kt. Waves 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. .FRI...S winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers. $$ ANZ540-010800- Eastern Bay- 735 PM EDT Sun Aug 31 2025 .TONIGHT...E winds 5 to 10 kt. Waves 1 ft or less. .MON...NE winds 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft. .TUE...N winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SE winds 5 kt. Waves flat. .WED...SW winds around 5 kt. Waves 1 ft or less. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 10 to 15 kt. Waves 1 ft. Showers likely through the night. .FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ533-010800- Chesapeake Bay from North Beach to Drum Point- 735 PM EDT Sun Aug 31 2025 .TONIGHT...NE winds 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. .WED NIGHT...S winds 5 to 10 kt. Waves 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. .FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ541-010800- Choptank River to Cambridge MD and the Little Choptank River- 735 PM EDT Sun Aug 31 2025 .TONIGHT...NE winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 10 to 15 kt. Waves 1 ft. .MON NIGHT...E winds 10 to 15 kt...becoming NE 5 to 10 kt after midnight. Waves 1 ft. .TUE...N winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SE winds 5 kt. Waves flat. .WED...SW winds 5 to 10 kt. Waves 1 ft or less. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. .FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ542-010800- Patuxent River to Broomes Island MD- 735 PM EDT Sun Aug 31 2025 .TONIGHT...NE winds 5 kt. Waves less than 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 around 5 kt. Waves 1 ft. .WED NIGHT...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. .FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ534-010800- Chesapeake Bay from Drum Point to Smith Point- 735 PM EDT Sun Aug 31 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY MORNING... .TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...N winds 5 to 10 kt. Waves 1 to 2 ft. .TUE NIGHT...SE winds 5 kt. Waves less than 1 ft. .WED...S winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...S winds 10 kt. Waves 2 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft...building to 3 ft. A chance of showers through the night. .FRI...S winds 10 kt. Waves 2 ft. A chance of showers in the morning. $$ ANZ543-010800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 735 PM EDT Sun Aug 31 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY MORNING... .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 in the afternoon. Waves 1 ft or less. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the night. .FRI...S winds 10 kt. Waves 1 ft. A chance of showers in the morning. $$