Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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112 FZUS51 KLWX 180558 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 1258 AM EST Tue Nov 18 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. ANZ500-182100- 1258 AM EST Tue Nov 18 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A wave of low pressure approaching from the Ohio River Valley will track along a stalled front over or just south of the Mid-Atlantic through Wednesday. The front will likely remain stalled just to the south through Thursday. Another area of low pressure may take a similar path Friday into Saturday. Small Craft Advisories may be needed Wednesday afternoon, and Friday night into Saturday. $$ ANZ535-182100- Tidal Potomac from Key Bridge to Indian Head- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 5 kt. Waves less than 1 ft. .TUE...SW winds around 5 kt. Waves 1 ft. A chance of rain. .TUE NIGHT...SE winds around 5 kt. Waves 1 ft. Rain. Patchy fog. Vsby 1 to 3 NM. .WED...N winds around 5 kt. Waves 1 ft. .WED NIGHT...NE winds around 5 kt. Waves 1 ft. .THU...SE winds around 5 kt. Waves 1 ft or less. .THU NIGHT...SE winds around 5 kt. Waves 1 ft. A chance of rain. .FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of rain in the morning. A chance of rain in the evening, then rain likely after midnight. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. $$ ANZ536-182100- Tidal Potomac from Indian Head to Cobb Island- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 5 kt. Waves less than 1 ft. .TUE...SW winds around 5 kt. Waves 1 ft. A chance of rain. .TUE NIGHT...SE winds 5 to 10 kt. Waves 1 ft. Rain. Vsby 1 to 3 NM. .WED...N winds 5 kt. Waves less than 1 ft. .WED NIGHT...NE winds around 5 kt. Waves 1 ft. .THU...E winds around 5 kt. Waves 1 ft or less. .THU NIGHT...SE winds around 5 kt. Waves 1 ft. .FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of rain in the morning. A chance of rain in the evening, then rain likely after midnight. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. $$ ANZ537-182100- Tidal Potomac from Cobb Island to Smith Point- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...N winds 10 kt. Waves 2 ft. .TUE...NW winds 5 to 10 kt...becoming S in the afternoon. Waves 1 ft or less. A chance of rain. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. Rain. Vsby 1 to 3 NM. .WED...NW winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .THU...E winds around 5 kt. Waves 1 ft. .THU NIGHT...SE winds around 5 kt. Waves 1 ft or less. .FRI...SW winds 5 to 10 kt...becoming W after midnight. Waves 1 to 2 ft. A chance of rain in the evening. Rain likely after midnight. .SAT...N winds 5 to 10 kt. Waves 1 to 2 ft. A chance of rain. $$ ANZ530-182100- Chesapeake Bay north of Pooles Island- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 10 kt. Waves 1 ft. .TUE...W winds 5 kt. Waves less than 1 ft. A chance of rain. .TUE NIGHT...S winds around 5 kt. Waves 1 ft. Rain. Patchy fog. Vsby 1 to 3 NM. .WED...NE winds 5 kt. Waves less than 1 ft. Patchy fog. .WED NIGHT...N winds around 5 kt. Waves 1 ft. .THU...E winds around 5 kt. Waves 1 ft. .THU NIGHT...SE winds around 5 kt. Waves 1 ft or less. A chance of rain. .FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of rain in the morning. Rain likely in the evening, then a chance of rain after midnight. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain in the morning. A chance of rain in the evening. $$ ANZ531-182100- Chesapeake Bay from Pooles Island to Sandy Point- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 10 kt. Waves 2 ft. .TUE...W winds 5 to 10 kt. Waves 1 ft. A chance of rain. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. Rain. Patchy fog. Vsby 1 to 3 NM. .WED...NE winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...NE winds 5 kt. Waves less than 1 ft. .THU...E winds around 5 kt. Waves flat. .THU NIGHT...SE winds around 5 kt. Waves 1 ft or less. A chance of rain. .FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 to 2 ft. A chance of rain in the morning. A chance of rain in the evening, then rain likely after midnight. .SAT...N winds 5 to 10 kt. Waves 1 to 2 ft. A chance of rain. $$ ANZ538-182100- Patapsco River including Baltimore Harbor- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...W winds 5 to 10 kt. Waves 1 ft. .TUE...W winds 5 kt. Waves less than 1 ft. A chance of rain. .TUE NIGHT...S winds 5 kt. Waves less than 1 ft. Rain. Patchy fog. Vsby 1 to 3 NM. .WED...NE winds 5 kt. Waves less than 1 ft. .WED NIGHT...NE winds around 5 kt. Waves flat. .THU...E winds around 5 kt. Waves flat. .THU NIGHT...SE winds around 5 kt. Waves flat. A chance of rain. .FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of rain in the morning. A chance of rain in the evening, then rain likely after midnight. .SAT...N winds 5 to 10 kt. Waves 1 ft or less. A chance of rain. $$ ANZ539-182100- Chester River to Queenstown MD- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 10 kt. Waves 2 ft. .TUE...W winds 5 to 10 kt. Waves 1 ft. A chance of rain. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. Rain. Patchy fog. Vsby 1 to 3 NM. .WED...NE winds 5 kt. Waves less than 1 ft. .WED NIGHT...NE winds 5 kt. Waves less than 1 ft. .THU...E winds around 5 kt. Waves flat. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of rain in the morning. A chance of rain in the evening, then rain likely after midnight. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. $$ ANZ532-182100- Chesapeake Bay from Sandy Point to North Beach- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 10 kt. Waves 2 ft. .TUE...W winds 5 to 10 kt. Waves 1 ft. A chance of rain. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. Rain. Patchy fog. Vsby 1 to 3 NM. .WED...N winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .THU...E winds around 5 kt. Waves 1 ft or less. .THU NIGHT...SE winds around 5 kt. Waves 1 ft or less. .FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 to 2 ft. A chance of rain in the morning. A chance of rain in the evening, then rain likely after midnight. .SAT...N winds 5 to 10 kt. Waves 1 to 2 ft. A chance of rain. $$ ANZ540-182100- Eastern Bay- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 10 kt. Waves 2 ft. .TUE...W winds 5 to 10 kt. Waves 1 ft. A chance of rain. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. Rain. Patchy fog. Vsby 1 to 3 NM. .WED...NE winds 5 kt. Waves less than 1 ft. .WED NIGHT...NE winds 5 kt. Waves less than 1 ft. .THU...E winds around 5 kt. Waves flat. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of rain in the morning. A chance of rain in the evening, then rain likely after midnight. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. $$ ANZ533-182100- Chesapeake Bay from North Beach to Drum Point- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 10 kt. Waves 2 ft. .TUE...W winds 5 to 10 kt...becoming S late. Waves 1 ft or less. A chance of rain. .TUE NIGHT...S winds 10 to 15 kt. Waves 1 ft. Rain. Vsby 1 to 3 NM. .WED...NW winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .THU...E winds around 5 kt. Waves 1 ft or less. .THU NIGHT...SE winds 5 kt. Waves less than 1 ft. .FRI...SW winds 5 to 10 kt...becoming NW 10 to 15 kt after midnight. Waves 1 to 2 ft. A chance of rain in the morning. A chance of rain in the evening, then rain likely after midnight. .SAT...N winds 10 to 15 kt. Waves 2 ft. A chance of rain. $$ ANZ541-182100- Choptank River to Cambridge MD and the Little Choptank River- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 10 kt. Waves 2 ft. .TUE...W winds 5 to 10 kt...becoming SW late. Waves 1 ft. A chance of rain. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. Rain. Vsby 1 to 3 NM. .WED...NE winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .THU...E winds around 5 kt. Waves 1 ft or less. .THU NIGHT...SE winds around 5 kt. Waves 1 ft or less. .FRI...SW winds 5 to 10 kt...becoming NW 10 to 15 kt after midnight. Waves 1 ft. A chance of rain in the morning. A chance of rain in the evening, then rain likely after midnight. .SAT...N winds 10 to 15 kt. Waves 1 ft. A chance of rain. $$ ANZ542-182100- Patuxent River to Broomes Island MD- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 5 kt. Waves less than 1 ft. .TUE...W winds 5 kt. Waves less than 1 ft. A chance of rain. .TUE NIGHT...SE winds 5 to 10 kt. Waves 1 ft. Rain. Vsby 1 to 3 NM. .WED...NW winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...NE winds 5 kt. Waves less than 1 ft. .THU...E winds around 5 kt. Waves 1 ft. .THU NIGHT...SE winds around 5 kt. Waves 1 ft. .FRI...SW winds 5 kt...becoming NW after midnight. Waves 1 ft. A chance of rain in the morning. A chance of rain in the evening, then rain likely after midnight. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. $$ ANZ534-182100- Chesapeake Bay from Drum Point to Smith Point- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 15 kt. Waves 3 ft. .TUE...NW winds 5 to 10 kt...becoming S late. Waves 1 to 2 ft. A chance of rain. .TUE NIGHT...S winds 10 to 15 kt. Waves 1 to 2 ft. Rain. Vsby 1 to 3 NM. .WED...W winds 5 to 10 kt...becoming N in the afternoon. Waves 1 ft. .WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .THU...NE winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...SE winds 5 kt. Waves less than 1 ft. .FRI...SW winds 5 to 10 kt...becoming W 10 to 15 kt after midnight. Waves 1 to 2 ft. A chance of rain in the evening. Rain likely after midnight. .SAT...N winds 10 to 15 kt. Waves 2 ft. A chance of rain. $$ ANZ543-182100- Tangier Sound and the inland waters surrounding Bloodsworth Island- 1258 AM EST Tue Nov 18 2025 .OVERNIGHT...NW winds 15 kt. Waves 2 ft. .TUE...NW winds 5 to 10 kt...becoming S late. Waves 1 ft. A chance of rain. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. Rain. Vsby 1 to 3 NM. .WED...W winds 5 to 10 kt...becoming N in the afternoon. Waves 1 ft. .WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .THU...NE winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...SE winds around 5 kt. Waves 1 ft or less. .FRI...SW winds 10 to 15 kt. Waves 1 ft. A chance of rain in the evening. Rain likely after midnight. .SAT...N winds 10 to 15 kt. Waves 1 ft. A chance of rain. $$