FZUS51 KLWX 051200 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 800 AM EDT Sun Apr 5 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. ANZ500-052000- 800 AM EDT Sun Apr 5 2026 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A strong cold front will move over the waters today. A reinforcing cold front will move through on Tuesday before high pressure builds overhead on Wednesday. Small Craft Advisories will likely be needed on Tuesday. $$ ANZ535-052000- Tidal Potomac from Key Bridge to Indian Head- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...SW winds 10 to 15 kt...becoming NW late. Gusts up to 25 kt. Waves 1 ft. Showers. Scattered tstms early this morning, then isolated tstms this afternoon. .TONIGHT...NW winds 5 to 10 kt with gusts to 25 kt. Waves 1 ft. .MON...NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. .MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .TUE...NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. .TUE NIGHT...N winds 5 to 10 kt. Waves 1 ft. .WED...SE winds around 5 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ536-052000- Tidal Potomac from Indian Head to Cobb Island- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...SW winds 15 to 20 kt with gusts to 25 kt... becoming W 10 kt late. Waves 1 to 2 ft. Scattered tstms. Scattered showers early this morning, then showers this afternoon. .TONIGHT...NW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft. .MON...NW winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...W winds 5 to 10 kt. Waves 1 ft. .TUE...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TUE NIGHT...N winds 5 to 10 kt. Waves 1 ft. .WED...E winds 5 to 10 kt. Waves 1 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ537-052000- Tidal Potomac from Cobb Island to Smith Point- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING... .TODAY...SW winds 15 to 20 kt...becoming W late. Gusts up to 25 kt. Waves 2 ft. Isolated showers and tstms early this morning, then showers and scattered tstms this afternoon. .TONIGHT...NW winds 5 to 10 kt...increasing to 15 to 20 kt with gusts to 25 kt in the late evening and overnight. Waves 2 to 3 ft. .MON...NW winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 kt late. Waves 1 to 2 ft. .MON NIGHT...S winds 5 to 10 kt...becoming W after midnight. Waves 1 ft. .TUE...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE NIGHT...N winds 10 to 15 kt. Waves 2 ft. .WED...NE winds 10 to 15 kt...becoming SE 5 to 10 kt. Waves 1 to 2 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ530-052000- Chesapeake Bay north of Pooles Island- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...SW winds 20 kt...becoming W 10 to 15 kt this afternoon. Gusts up to 25 kt. Waves 1 to 2 ft. Showers with isolated tstms. .TONIGHT...NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. .MON...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .MON NIGHT...W winds 5 to 10 kt. Waves 1 ft. .TUE...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .TUE NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft or less. .WED...SE winds around 5 kt. Waves flat. .THU...Swinds 5 to 10 kt. Waves 1 ft or less. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-052000- Chesapeake Bay from Pooles Island to Sandy Point- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...SW winds 20 kt...becoming W 10 to 15 kt this afternoon. Gusts up to 25 kt. Waves 2 to 3 ft...subsiding to 1 ft late. Isolated tstms. Showers. .TONIGHT...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .MON...NW winds 10 to 15 kt...becoming W late. Gusts up to 20 kt. Waves 1 to 2 ft. .MON NIGHT...W winds 5 to 10 kt. Waves 1 ft. .TUE...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .TUE NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .WED...E winds 5 to 10 kt...becoming SE. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-052000- Patapsco River including Baltimore Harbor- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...SW winds 15 kt...becoming W this afternoon. Gusts up to 20 kt. Waves 1 ft. Showers with isolated tstms. .TONIGHT...NW winds 10 kt with gusts to 20 kt. Waves 1 ft. .MON...W winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...W winds 5 to 10 kt. Waves 1 ft. .TUE...NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. .TUE NIGHT...N winds 5 to 10 kt. Waves 1 ft or less. .WED...SE winds 5 kt. Waves less than 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft or less. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-052000- Chester River to Queenstown MD- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...SW winds 15 to 20 kt...becoming W 10 kt late. Gusts up to 25 kt. Waves 1 to 2 ft. Isolated tstms. Scattered showers early this morning, then showers this afternoon. .TONIGHT...NW winds 15 to 20 kt. Gusts up to 25 kt. Waves 2 ft. .MON...NW winds 10 to 15 kt...becoming W 5 to 10 kt late. Gusts up to 20 kt. Waves 1 to 2 ft. .MON NIGHT...W winds 5 to 10 kt. Waves 1 ft. .TUE...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. .TUE NIGHT...N winds 10 to 15 kt. Waves 1 to 2 ft. .WED...E winds 5 to 10 kt...becoming SE. Waves 1 ft or less. .THU...S winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ532-052000- Chesapeake Bay from Sandy Point to North Beach- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...SW winds 15 to 20 kt with gusts to 25 kt... becoming W 10 kt late. Waves 3 ft...subsiding to 1 ft late. Isolated tstms. Scattered showers early this morning, then showers this afternoon. .TONIGHT...NW winds 15 to 20 kt. Gusts up to 25 kt. Waves 2 ft. .MON...NW winds 10 to 15 kt...becoming W late. Gusts up to 20 kt. Waves 1 to 2 ft. .MON NIGHT...W winds 5 to 10 kt. Waves 1 ft. .TUE...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .TUE NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .WED...E winds 5 to 10 kt...becoming SE. Waves 1 ft. .THU...SE winds 10 to 15 kt. Waves 1 to 2 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-052000- Eastern Bay- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...SW winds 15 to 20 kt with gusts to 25 kt... becoming W 10 kt late. Waves 1 to 2 ft. Isolated tstms. Scattered showers early this morning, then showers this afternoon. .TONIGHT...NW winds 10 to 15 kt. Gusts up to 25 kt. Waves 2 ft. .MON...NW winds 10 to 15 kt...becoming W 5 to 10 kt late. Gusts up to 20 kt. Waves 1 to 2 ft. .MON NIGHT...W winds 5 to 10 kt. Waves 1 ft. .TUE...NW winds 15 to 20kt with gusts to 25 kt. Waves 2 ft. .TUE NIGHT...N winds 10 to 15 kt. Waves 1 ft. .WED...E winds 5 to 10 kt...becoming SE. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ533-052000- Chesapeake Bay from North Beach to Drum Point- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING... .TODAY...SW winds 15 to 20 kt...becoming NW 10 kt late. Gusts up to 25 kt. Waves 2 to 3 ft. Scattered tstms. Scattered showers early this morning, then showers this afternoon. .TONIGHT...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. .MON...NW winds 15 to 20 kt...becoming W 5 to 10 kt in the afternoon. Waves 3 ft...subsiding to 1 ft in the afternoon. .MON NIGHT...S winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. .TUE...NW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. .TUE NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .WED...NE winds 10 to 15 kt...becoming SE 5 to 10 kt. Waves 1 to 2 ft. .THU...SE winds 10 to 15 kt. Waves 1 to 2 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ541-052000- Choptank River to Cambridge MD and the Little Choptank River- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING... .TODAY...SW winds 15 to 20 kt...becoming NW 10 kt late. Gusts up to 25 kt. Waves 2 to 3 ft...subsiding to 1 ft late. Scattered showers with isolated tstms early this morning, then showers and scattered tstms this afternoon. .TONIGHT...NW winds 15 to 20 kt. Gusts up to 25 kt. Waves 2 ft. .MON...NW winds 15 to 20 kt...becoming W 5 to 10 kt in the afternoon. Waves 1 to 2 ft. .MON NIGHT...S winds 5 to 10 kt...becoming W after midnight. Waves 1 ft. .TUE...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .TUE NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .WED...NE winds 10 to 15 kt...becoming SE 5 to 10 kt. Waves 1 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ542-052000- Patuxent River to Broomes Island MD- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING... .TODAY...SW winds 15 to 20 kt...becoming W 10 kt late. Gusts up to 25 kt. Waves 1 ft. Scattered showers and tstms early this morning, then showers and scattered tstms this afternoon. .TONIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .MON...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves 1 ft. .MON NIGHT...S winds 5 kt...becoming NW after midnight. Waves 1 ft. .TUE...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .TUE NIGHT...N winds 5 to 10 kt. Waves 1 ft. .WED...E winds 5 to 10 kt. Waves 1 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ534-052000- Chesapeake Bay from Drum Point to Smith Point- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING... .TODAY...SW winds 20 kt...becoming W late. Gusts up to 25 kt. Waves 3 ft. Isolated showers and tstms early this morning, then showers with isolated tstms this afternoon. .TONIGHT...NW winds 5 to 10 kt...increasing to 15 to 20 kt with gusts to 25 kt in the late evening and overnight. Waves 3 ft. Scattered showers. .MON...NW winds 15 to 20 kt with gusts to 25 kt... becoming W 5 to 10 kt in the afternoon. Waves 2 to 3 ft. .MON NIGHT...SW winds 10 to 15 kt. Waves 1 ft. .TUE...NW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. .TUE NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft. .WED...NE winds 10 to 15 kt...becoming SE 5 to 10 kt. Waves 1 to 2 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ543-052000- Tangier Sound and the inland waters surrounding Bloodsworth Island- 800 AM EDT Sun Apr 5 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING... .TODAY...S winds 20 kt...becoming W late. Gusts up to 25 kt. Waves 2 ft. Isolated showers and tstms early this morning, then showers and scattered tstms this afternoon. .TONIGHT...NW winds 5 to 10 kt...increasing to 15 to 20 kt with gusts to 25 kt in the late evening and overnight. Waves 2 ft. Scattered showers. .MON...NW winds 15 to 20 kt with gusts to 25 kt... becoming W 5 to 10 kt in the afternoon. Waves 1 to 2 ft. .MON NIGHT...SW winds 10 to 15 kt. Waves 1 ft. .TUE...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .TUE NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .WED...NE winds 10 to 15 kt...becoming SE 5 to 10 kt. Waves 1 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$