FZUS51 KLWX 250000 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 800 PM EDT Fri Apr 24 2026 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. ANZ500-250800- 800 PM EDT Fri Apr 24 2026 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A backdoor cold front will move across the area today, before stalling out and lingering nearby through Saturday night. Hazardous marine conditions are likely for most of this weekend, before winds decrease early next week. High pressure builds to the north late in the weekend and into early next week. Small Craft Advisories may need to be extended through Monday morning. $$ ANZ535-250800- Tidal Potomac from Key Bridge to Indian Head- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 5 kt. Waves less than 1 ft. Scattered showers early this evening. .SAT...E winds 5 to 10 kt. Gusts up to 20 kt... increasing to 25 kt late. Waves 1 ft. A chance of showers. .SAT NIGHT...NE winds 10 kt with gusts to 25 kt. Waves 1 ft. Showers. .SUN...NE winds 10 kt with gusts to 25 kt. Waves 1 ft. A chance of showers. .SUN NIGHT...NE winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft. A chance of showers. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft. .TUE...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...SE winds around 5 kt. Waves 1 ft. A chance of showers. $$ ANZ536-250800- Tidal Potomac from Indian Head to Cobb Island- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 10 kt. Waves 1 ft. Isolated showers early this evening. .SAT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers. .SUN...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely. .SUN NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance of showers. .MON...NE winds 10 to 15 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...SE winds around 5 kt. Waves 1 ft. A chance of showers. $$ ANZ537-250800- Tidal Potomac from Cobb Island to Smith Point- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft. Scattered showers early this evening. .SAT...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft. .SAT NIGHT...NE winds 15 kt...becoming 15 to 20 kt late. Gusts up to 25 kt. Waves 3 ft. Showers. .SUN...NE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. Showers likely. .SUN NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A chance of showers. .MON...N winds 15 to 20 kt. Waves 2 to 3 ft. .MON NIGHT...NE winds 10 to 15 kt. Waves 2 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ530-250800- Chesapeake Bay north of Pooles Island- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 10 kt. Waves 1 ft or less. Scattered showers. .SAT...E winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft. Showers likely. .SAT NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. Showers. .SUN...NE winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 1 to 2 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft or less. .TUE...E winds around 5 kt. Waves 1 ft or less. A chance of showers. .WED...SE winds around 5 kt. Waves flat. A chance of showers. $$ ANZ531-250800- Chesapeake Bay from Pooles Island to Sandy Point- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 10 kt...becoming E after midnight. Waves 1 ft or less. Scattered showers with isolated tstms early this evening, then scattered showers after midnight. .SAT...E winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. A chance of showers. .SAT NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. Showers. .SUN...NE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 2 to 3 ft. .MON...NE winds 10 to 15 kt. Waves 2 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft. .TUE...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...SE winds around 5 kt. Waves 1 ft or less. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-250800- Patapsco River including Baltimore Harbor- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 5 kt...becoming E late. Waves 1 ft or less. Scattered showers with isolated tstms early this evening, then isolated showers after midnight. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt in the afternoon. Waves 1 to 2 ft. Showers likely. .SAT NIGHT...E winds 10 to 15 kt...becoming NE late. Gusts up to 25 kt. Waves 2 ft. Showers. .SUN...NE winds 15 kt with gusts to 25 kt. Waves 2 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 1 ft. .MON...NE winds 10 kt. Waves 1 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft. .TUE...SE winds around 5 kt. Waves 1 ft or less. A chance of showers. .WED...SE winds around 5 kt. Waves flat. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-250800- Chester River to Queenstown MD- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 5 kt...becoming E after midnight. Waves 1 ft or less. Scattered showers with isolated tstms early this evening, then scattered showers after midnight. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt in the afternoon. Waves 1 to 2 ft. A chance of showers. .SAT NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. Showers. .SUN...NE winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 1 to 2 ft. A chance of showers. .MON...NE winds 10 to 15 kt. Waves 1 to 2 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 ft or less. .TUE...E winds around 5 kt. Waves 1 ft or less. A chance of showers. .WED...SE winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ532-250800- Chesapeake Bay from Sandy Point to North Beach- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 10 kt...becoming E late. Waves 1 ft. Scattered showers with isolated tstms early this evening, then isolated showers after midnight. .SAT...E winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. A chance of showers. .SAT NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. Showers. .SUN...NE winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. Showers likely. .SUN NIGHT...NE winds 15 to 20 kt. Gusts up to 30 kt...diminishing to 20 kt after midnight. Waves 2 to 3 ft. A chance of showers. .MON...NE winds 15 to 20 kt. Waves 2 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 to 2 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...SE winds 5 to 10 kt...becoming W after midnight. Waves 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-250800- Eastern Bay- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 10 kt...becoming E late. Waves 1 ft or less. Scattered showers with isolated tstms early this evening, then isolated showers after midnight. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt in the afternoon. Waves 1 to 2 ft. A chance of showers. .SAT NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. Showers. .SUN...NE winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. Showers likely. .SUN NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A chance of showers. .MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...E winds around 5 kt. Waves 1 ft or less. A chance of showers. .WED...S winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ533-250800- Chesapeake Bay from North Beach to Drum Point- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 10 kt. Waves 1 to 2 ft. Scattered showers early this evening. .SAT...E winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. .SAT NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. Showers. .SUN...NE winds 15 to 20 kt with gusts to 30 kt. Waves 4 ft. Showers likely. .SUN NIGHT...NE winds 20 to 25 kt. Gusts up to 30 kt in the evening. Waves 3 ft. A chance of showers. .MON...N winds 15 to 20 kt. Waves 3 ft. .MON NIGHT...NE winds 10 to 15 kt. Waves 1 to 2 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ541-250800- Choptank River to Cambridge MD and the Little Choptank River- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 10 kt. Waves 1 ft or less. Scattered showers early this evening. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt late. Waves 1 to 2 ft. .SAT NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. Showers. .SUN...NE winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. Showers likely. .SUN NIGHT...NE winds 15 to 20 kt. Gusts up to 30 kt in the evening. Waves 2 ft. A chance of showers. .MON...N winds 15 to 20 kt. Waves 2 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft or less. A chance of showers. .WED...SE winds 5 kt. Waves less than 1 ft. A chance of showers. $$ ANZ542-250800- Patuxent River to Broomes Island MD- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 5 to 10 kt. Waves 1 ft. Scattered showers early this evening. .SAT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .SAT NIGHT...NE winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. Showers. .SUN...NE winds 15 kt with gusts to 25 kt. Waves 1 ft. Showers likely. .SUN NIGHT...NE winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. A chance of showers. .MON...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...SE winds around 5 kt. Waves 1 ft. A chance of showers. $$ ANZ534-250800- Chesapeake Bay from Drum Point to Smith Point- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Scattered showers early this evening. .SAT...E winds 15 kt with gusts to 25 kt. Waves 3 ft. .SAT NIGHT...E winds 15 to 20 kt...becoming NE late. Gusts up to 25 kt. Waves 3 ft. Showers. .SUN...NE winds 20 kt with gusts to 30 kt. Waves 4 ft. Showers likely. .SUN NIGHT...NE winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft. A chance of showers. .MON...N winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. .MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$ ANZ543-250800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 800 PM EDT Fri Apr 24 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT SATURDAY THROUGH SUNDAY AFTERNOON... .TONIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Scattered showers early this evening. .SAT...E winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .SAT NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. Showers. .SUN...NE winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. Showers likely. .SUN NIGHT...NE winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. A chance of showers. .MON...N winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. $$