Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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632 FZUS51 KLWX 302334 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 734 PM EDT Sat Aug 30 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. ANZ500-310800- 734 PM EDT Sat Aug 30 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... High pressure will build north of the area this weekend and will continue to influence the area into much of next week. The next cold front approaches the waters by late next week. A Small Craft Advisory may be needed for portions of the waters by Wednesday night. $$ ANZ535-310800- Tidal Potomac from Key Bridge to Indian Head- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds around 5 kt. Waves 1 ft or less. .SUN...NE winds around 5 kt. Waves 1 ft. .SUN NIGHT...NE winds around 5 kt. Waves 1 ft. .MON...NE winds around 5 kt. Waves 1 ft. .MON NIGHT...E winds around 5 kt. Waves 1 ft. .TUE...NE winds around 5 kt. Waves 1 ft. .TUE NIGHT...S winds around 5 kt. Waves 1 ft. .WED...S winds around 5 kt. Waves 1 ft. .THU...SE winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of showers. $$ ANZ536-310800- Tidal Potomac from Indian Head to Cobb Island- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds around 5 kt. Waves 1 ft or less. .SUN...NE winds 5 kt. Waves less than 1 ft. .SUN NIGHT...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 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...SE winds 5 to 10 kt...becoming W after midnight. Waves 1 ft. A chance of showers. $$ ANZ537-310800- Tidal Potomac from Cobb Island to Smith Point- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 5 kt. Waves less than 1 ft. .WED...SW winds 5 kt...becoming SE. Waves 1 ft or less. .THU...S winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers. $$ ANZ530-310800- Chesapeake Bay north of Pooles Island- 734 PM EDT Sat Aug 30 2025 .TONIGHT...N winds 5 kt. Waves flat. .SUN...NE winds 5 kt. Waves flat. .SUN NIGHT...NE winds around 5 kt. Waves flat. .MON...NE winds 5 kt. Waves less than 1 ft. .MON NIGHT...E winds around 5 kt. Waves 1 ft or less. .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 5 to 10 kt. Waves 1 ft. A chance of showers in the afternoon. Showers likely through the night. $$ ANZ531-310800- Chesapeake Bay from Pooles Island to Sandy Point- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...E winds around 5 kt. Waves 1 ft or less. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds 5 kt. Waves less than 1 ft. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 10 to 15 kt. Waves 1 ft. A chance of showers. $$ ANZ538-310800- Patapsco River including Baltimore Harbor- 734 PM EDT Sat Aug 30 2025 .TONIGHT...N winds 5 kt. Waves flat. .SUN...NE winds 5 kt. Waves flat. .SUN NIGHT...NE winds around 5 kt. Waves flat. .MON...NE winds 5 kt. Waves less than 1 ft. .MON NIGHT...E winds around 5 kt. Waves 1 ft or less. .TUE...NE winds around 5 kt. Waves flat. .TUE NIGHT...S winds 5 kt. Waves flat. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ539-310800- Chester River to Queenstown MD- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds 5 kt. Waves flat. .SUN...NE winds 5 kt. Waves less than 1 ft. .SUN NIGHT...E winds around 5 kt. Waves flat. .MON...NE winds 5 kt. Waves less than 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft or less. .TUE...NE winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds 5 kt. Waves flat. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ532-310800- Chesapeake Bay from Sandy Point to North Beach- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...E winds around 5 kt. Waves 1 ft or less. .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 to 10 kt. Waves 1 ft. .TUE NIGHT...S 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. A chance of showers. $$ ANZ540-310800- Eastern Bay- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds 5 kt. Waves flat. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...E winds around 5 kt. Waves 1 ft or less. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft or less. .TUE...NE winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds 5 kt. Waves flat. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ533-310800- Chesapeake Bay from North Beach to Drum Point- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...E 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 to 10 kt. Waves 1 ft. .TUE NIGHT...S 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...SE winds 10 to 15 kt...becoming SW after midnight. Waves 1 to 2 ft. A chance of showers. $$ ANZ541-310800- Choptank River to Cambridge MD and the Little Choptank River- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds 5 kt. Waves flat. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...E winds around 5 kt. Waves 1 ft or less. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SE winds 5 kt. Waves less than 1 ft. .WED...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ542-310800- Patuxent River to Broomes Island MD- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds around 5 kt. Waves 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...NE winds around 5 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. $$ ANZ534-310800- Chesapeake Bay from Drum Point to Smith Point- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds 5 to 10 kt. Waves 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 10 kt. Waves 1 to 2 ft. .MON NIGHT...NE winds 10 kt. Waves 1 to 2 ft. .TUE...NE winds 5 to 10 kt. Waves 1 to 2 ft. .TUE NIGHT...SE winds 5 to 10 kt. Waves 1 ft. .WED...W winds 5 kt...becoming SE. Waves 1 to 2 ft. .THU...SE winds 10 to 15 kt...becoming SW after midnight. Waves 1 to 2 ft. A chance of showers. $$ ANZ543-310800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 734 PM EDT Sat Aug 30 2025 .TONIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...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 to 10 kt. Waves 1 ft. .TUE NIGHT...SE winds 5 to 10 kt. Waves 1 ft. .WED...SE winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$