Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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629 FZUS51 KLWX 210834 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 434 AM EDT Sat Jun 21 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. ANZ500-212300- 434 AM EDT Sat Jun 21 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A large area of high pressure will influence the area through at least next Tuesday. A frontal boundary approaches from the north by the middle of next week. Small Craft Advisories may be needed for portions of the waters tonight into Sunday morning. $$ ANZ535-212300- Tidal Potomac from Key Bridge to Indian Head- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...Light winds. Waves flat. .TODAY...SW winds around 5 kt. Waves 1 ft or less. .TONIGHT...S winds 5 kt. Waves less than 1 ft. .SUN...SW winds 5 kt. Waves less than 1 ft. .SUN NIGHT...SW winds around 5 kt. Waves 1 ft. .MON...NW winds around 5 kt. Waves 1 ft. .MON NIGHT...W winds around 5 kt. Waves 1 ft or less. .TUE...NW winds around 5 kt. Waves 1 ft. .WED...NW winds around 5 kt. Waves 1 ft. $$ ANZ536-212300- Tidal Potomac from Indian Head to Cobb Island- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves flat. .TODAY...S winds around 5 kt. Waves 1 ft or less. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...SW winds around 5 kt. Waves 1 ft. .MON...NW winds around 5 kt. Waves 1 ft. .MON NIGHT...W winds around 5 kt. Waves 1 ft or less. .TUE...NW winds around 5 kt. Waves 1 ft. .WED...NW winds around 5 kt. Waves 1 ft. $$ ANZ537-212300- Tidal Potomac from Cobb Island to Smith Point- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...S winds 5 to 10 kt. Waves 1 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW late. Gusts up to 20 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .MON...NW winds 5 kt. Waves less than 1 ft. .MON NIGHT...SW winds around 5 kt. Waves flat. .TUE...NW winds 5 kt. Waves less than 1 ft. .WED...NW winds around 5 kt. Waves 1 ft or less. $$ ANZ530-212300- Chesapeake Bay north of Pooles Island- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves flat. .TODAY...SW winds 5 to 10 kt. Waves 1 ft or less. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .SUN...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .SUN NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. .MON...NW winds 5 kt. Waves less than 1 ft. .MON NIGHT...W winds around 5 kt. Waves flat. .TUE...NW winds 5 kt. Waves less than 1 ft. .WED...N winds around 5 kt. Waves flat. $$ ANZ531-212300- Chesapeake Bay from Pooles Island to Sandy Point- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves flat. .TODAY...S winds 5 to 10 kt. Waves 1 ft or less. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .SUN...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft. .SUN NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .MON...NW winds 5 kt. Waves less than 1 ft. .MON NIGHT...W winds 5 kt. Waves less than 1 ft. .TUE...NW winds 5 kt. Waves less than 1 ft. .WED...NE winds around 5 kt. Waves 1 ft or less. $$ ANZ538-212300- Patapsco River including Baltimore Harbor- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...Light winds. Waves flat. .TODAY...S winds 5 to 10 kt. Waves 1 ft or less. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...SW winds around 5 kt. Waves 1 ft or less. .MON...NW winds around 5 kt. Waves flat. .MON NIGHT...W winds around 5 kt. Waves flat. .TUE...NW winds around 5 kt. Waves flat. .WED...NE winds around 5 kt. Waves flat. $$ ANZ539-212300- Chester River to Queenstown MD- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves flat. .TODAY...SW winds 5 to 10 kt. Waves 1 ft or less. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .MON...NW winds 5 kt. Waves flat. .MON NIGHT...W winds around 5 kt. Waves flat. .TUE...NW winds around 5 kt. Waves 1 ft or less. .WED...NE winds around 5 kt. Waves flat. $$ ANZ532-212300- Chesapeake Bay from Sandy Point to North Beach- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...S winds 5 to 10 kt. Waves 1 ft or less. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .SUN...SW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves 1 to 2 ft. .SUN NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .MON...W winds 5 kt. Waves less than 1 ft. .MON NIGHT...SW winds 5 kt. Waves flat. .TUE...NW winds 5 kt. Waves flat. .WED...NE winds 5 kt. Waves flat. $$ ANZ540-212300- Eastern Bay- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves flat. .TODAY...SW winds 5 to 10 kt. Waves 1 ft or less. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .MON...NW winds 5 kt. Waves flat. .MON NIGHT...SW winds around 5 kt. Waves flat. .TUE...NW winds 5 kt. Waves flat. .WED...N winds 5 kt. Waves flat. $$ ANZ533-212300- Chesapeake Bay from North Beach to Drum Point- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...S winds 5 to 10 kt. Gusts up to 20 kt late. Waves 1 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW late. Gusts up to 20 kt. Waves 2 ft. .SUN...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft. .SUN NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .MON...NW winds 5 kt. Waves less than 1 ft. .MON NIGHT...SW winds 5 kt. Waves flat. .TUE...NW winds 5 kt. Waves less than 1 ft. .WED...N winds 5 kt. Waves less than 1 ft. $$ ANZ541-212300- Choptank River to Cambridge MD and the Little Choptank River- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...SW winds 5 to 10 kt. Waves 1 ft or less. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .SUN...SW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves 1 to 2 ft. .SUN NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .MON...NW winds 5 kt. Waves less than 1 ft. .MON NIGHT...SW winds 5 kt. Waves flat. .TUE...NW winds 5 kt. Waves less than 1 ft. .WED...NW winds 5 kt. Waves less than 1 ft. $$ ANZ542-212300- Patuxent River to Broomes Island MD- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...SW winds 5 to 10 kt. Waves 1 ft. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...SW winds 5 kt. Waves less than 1 ft. .MON...NW winds 5 kt. Waves less than 1 ft. .MON NIGHT...SW winds around 5 kt. Waves 1 ft. .TUE...NW winds around 5 kt. Waves 1 ft. .WED...N winds around 5 kt. Waves 1 ft. $$ ANZ534-212300- Chesapeake Bay from Drum Point to Smith Point- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 10 kt. Waves 1 ft. .TODAY...S winds 5 to 10 kt. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 25 kt. Waves 3 ft. .SUN...S winds 5 to 10 kt. Waves 2 ft. .SUN NIGHT...SW winds 5 to 10 kt. Waves 1 to 2 ft. .MON...W winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...SW winds 5 kt. Waves less than 1 ft. .TUE...W winds 5 kt. Waves less than 1 ft. .WED...W winds 5 kt. Waves less than 1 ft. $$ ANZ543-212300- Tangier Sound and the inland waters surrounding Bloodsworth Island- 434 AM EDT Sat Jun 21 2025 .REST OF THE OVERNIGHT...SW winds 10 kt. Waves 1 ft. .TODAY...SW winds 5 to 10 kt. Waves 1 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .SUN...SW winds 10 kt. Waves 1 ft. .SUN NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .MON...W winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...SW winds 5 kt. Waves less than 1 ft. .TUE...W winds 5 to 10 kt. Waves 1 ft. .WED...SW winds 5 kt. Waves less than 1 ft. $$