Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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312 FZUS51 KLWX 200734 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 233 AM EST Thu Nov 20 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. ANZ500-202100- 233 AM EST Thu Nov 20 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A front will remain stalled just to the south through tonight. An area of low pressure approaching from the Midwest will track along this stalled front Friday into Saturday. High pressure will return Sunday into Monday. Small Craft Advisories may be needed Friday night into Saturday. $$ ANZ535-202100- Tidal Potomac from Key Bridge to Indian Head- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 5 kt. Waves less than 1 ft. .THU...Light winds. Waves flat. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...S winds around 5 kt. Waves 1 ft. A chance of rain. .FRI NIGHT...SW winds around 5 kt. Waves 1 ft. Rain. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. .SAT NIGHT...N winds around 5 kt. Waves 1 ft. .SUN...W winds around 5 kt. Waves 1 ft. .MON...NE winds around 5 kt. Waves 1 ft. $$ ANZ536-202100- Tidal Potomac from Indian Head to Cobb Island- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 5 to 10 kt. Waves 1 ft. .THU...E winds around 5 kt. Waves 1 ft or less. Patchy fog. Vsby 1 to 3 NM. .THU NIGHT...SE winds around 5 kt. Waves 1 ft. .FRI...S winds around 5 kt. Waves 1 ft. A chance of rain. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. .SAT NIGHT...N winds around 5 kt. Waves 1 ft. .SUN...W winds around 5 kt. Waves 1 ft. .MON...NE winds around 5 kt. Waves 1 ft. $$ ANZ537-202100- Tidal Potomac from Cobb Island to Smith Point- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 5 kt. Waves less than 1 ft. .THU...NE winds around 5 kt. Waves 1 ft or less. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain. .SAT...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain. .SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SUN...W winds around 5 kt...increasing to 5 to 10 kt after midnight. Waves 1 ft or less. .MON...NW winds 5 kt...becoming SE after midnight. Waves 1 ft. $$ ANZ530-202100- Chesapeake Bay north of Pooles Island- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 5 kt. Waves flat. Patchy fog. Vsby 1 to 3 NM. .THU...NE winds around 5 kt. Waves flat. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...S winds around 5 kt. Waves flat. A chance of rain. .FRI NIGHT...SW winds around 5 kt...becoming NW after midnight. Waves 1 ft or less. Rain. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. .SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft or less. .SUN...W winds 5 to 10 kt. Waves 1 ft or less. .MON...NW winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft or less. $$ ANZ531-202100- Chesapeake Bay from Pooles Island to Sandy Point- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 5 kt. Waves less than 1 ft. .THU...NE winds around 5 kt. Waves flat. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...S winds around 5 kt. Waves 1 ft or less. A chance of rain. .FRI NIGHT...S winds 5 kt...becoming NW after midnight. Waves 1 ft. Rain. .SAT...N winds 10 kt. Waves 1 ft. A chance of rain. .SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SUN...W winds 5 kt...becoming SW. Waves 1 ft or less. .MON...W winds 5 to 10 kt...becoming SE. Waves 1 ft. $$ ANZ538-202100- Patapsco River including Baltimore Harbor- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 5 kt. Waves flat. .THU...NE winds around 5 kt. Waves flat. .THU NIGHT...Light winds. Waves flat. .FRI...S winds around 5 kt. Waves flat. A chance of rain. .FRI NIGHT...W winds around 5 kt. Waves flat. Rain. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. .SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft or less. .SUN...W winds around 5 kt. Waves flat. .MON...W winds around 5 kt. Waves 1 ft or less. $$ ANZ539-202100- Chester River to Queenstown MD- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...NE winds around 5 kt. Waves flat. .THU...NE winds around 5 kt. Waves flat. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. Rain. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. .SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SUN...W winds 5 to 10 kt. Waves 1 ft or less. .MON...SW winds 5 kt. Waves less than 1 ft. $$ ANZ532-202100- Chesapeake Bay from Sandy Point to North Beach- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 5 kt. Waves less than 1 ft. .THU...NE winds around 5 kt. Waves flat. Patchy fog. Vsby 1 to 3 NM. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain. .SAT...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain. .SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SUN...W winds 5 kt...becoming SW. Waves 1 ft or less. .MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft. $$ ANZ540-202100- Eastern Bay- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...NE winds 5 kt. Waves less than 1 ft. .THU...NE winds around 5 kt. Waves flat. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. Rain. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. .SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SUN...W winds 5 to 10 kt. Waves 1 ft or less. .MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft or less. $$ ANZ533-202100- Chesapeake Bay from North Beach to Drum Point- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 5 kt. Waves less than 1 ft. .THU...NE winds around 5 kt. Waves 1 ft or less. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain. .SAT...N winds 10 to 15 kt. Waves 2 ft. A chance of rain. .SAT NIGHT...N winds 10 to 15 kt. Waves 1 to 2 ft. .SUN...NW winds 5 kt...becoming SW. Waves 1 ft or less. .MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft. $$ ANZ541-202100- Choptank River to Cambridge MD and the Little Choptank River- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 5 kt. Waves less than 1 ft. .THU...NE winds around 5 kt. Waves 1 ft or less. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain. .SAT...N winds 10 to 15 kt. Waves 1 ft. A chance of rain. .SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SUN...NW winds 5 kt...becoming SW. Waves 1 ft or less. .MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft. $$ ANZ542-202100- Patuxent River to Broomes Island MD- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 5 kt. Waves less than 1 ft. .THU...NE winds around 5 kt. Waves 1 ft. .THU NIGHT...SE winds around 5 kt. Waves 1 ft or less. .FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain. .SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SUN...W winds 5 kt. Waves less than 1 ft. .MON...SW winds 5 kt. Waves less than 1 ft. $$ ANZ534-202100- Chesapeake Bay from Drum Point to Smith Point- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 10 kt. Waves 1 ft. .THU...N winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...E winds around 5 kt. Waves flat. .FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of rain. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain. .SAT...N winds 10 to 15 kt. Waves 2 ft. A chance of rain. .SAT NIGHT...N winds 10 to 15 kt. Waves 2 ft. .SUN...N winds 5 to 10 kt...becoming SW. Waves 1 ft. .MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft. $$ ANZ543-202100- Tangier Sound and the inland waters surrounding Bloodsworth Island- 233 AM EST Thu Nov 20 2025 .OVERNIGHT...N winds 5 to 10 kt. Waves 1 ft. .THU...N winds 5 to 10 kt. Waves 1 ft or less. .THU NIGHT...E winds around 5 kt. Waves flat. .FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of rain. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain. .SAT...NW winds 10 to 15 kt. Waves 1 ft. A chance of rain. .SAT NIGHT...N winds 10 to 15 kt. Waves 1 ft. .SUN...N winds 5 to 10 kt...becoming W. Waves 1 ft. .MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft. $$