FZUS51 KLWX 191909 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 308 PM EDT Sun Apr 19 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. ANZ500-200800- 308 PM EDT Sun Apr 19 2026 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A secondary cold front will pass through tonight into Monday morning. High pressure will build in late Monday through Tuesday. Another front looks to drop in from the north Wednesday. Small Craft Advisories may be needed late Tuesday into Wednesday in south to southwest flow. $$ ANZ535-200800- Tidal Potomac from Key Bridge to Indian Head- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 25 kt. Waves 1 ft. .TONIGHT...NW winds 10 to 15 kt with gusts to 25 kt... becoming SW 5 kt after midnight. Waves 1 ft. Scattered sprinkles. .MON...NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. Scattered sprinkles. .MON NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft. .TUE...W winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. .WED...W winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of showers. .THU...NW winds around 5 kt. Waves 1 ft or less. $$ ANZ536-200800- Tidal Potomac from Indian Head to Cobb Island- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 25 kt. Waves 2 ft. .TONIGHT...NW winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 to 10 kt after midnight. Waves 1 to 2 ft. Scattered sprinkles. .MON...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Scattered sprinkles. .MON NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 ft. .TUE...W winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. .WED...W winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of showers. .THU...NW winds around 5 kt. Waves 1 ft. $$ ANZ537-200800- Tidal Potomac from Cobb Island to Smith Point- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY NIGHT... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...NW winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 to 10 kt after midnight. Waves 1 to 2 ft. .MON...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Scattered sprinkles. .MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...N winds 5 to 10 kt...becoming SE in the afternoon. Waves 1 to 2 ft. .TUE NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .WED...SW winds 10 to 15 kt...becoming NW around 5 kt. Waves 1 to 2 ft...subsiding to flat after midnight. A chance of showers. .THU...NE winds 5 kt. Waves flat. $$ ANZ530-200800- Chesapeake Bay north of Pooles Island- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 25 kt. Waves 2 ft. .TONIGHT...NW winds 10 to 15 kt with gusts to 25 kt... becoming W 5 to 10 kt after midnight. Waves 1 to 2 ft. Scattered sprinkles. .MON...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Scattered sprinkles. .MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .TUE...W winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...SW winds 5 to 10 kt...becoming NW. Waves 1 ft or less. A chance of showers. .THU...NW winds around 5 kt. Waves 1 ft or less. $$ ANZ531-200800- Chesapeake Bay from Pooles Island to Sandy Point- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 25 kt. Waves 2 ft. .TONIGHT...NW winds 10 to 15 kt with gusts to 25 kt... becoming SW 5 to 10 kt late. Waves 1 to 2 ft. Scattered sprinkles. .MON...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. Scattered sprinkles. .MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...N winds 5 to 10 kt...becoming S in the afternoon. Waves 1 ft. .TUE NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance of showers. .WED...W winds 5 to 10 kt...becoming N after midnight. Waves 1 to 2 ft...subsiding to flat after midnight. A chance of showers. .THU...W winds around 5 kt. Waves flat. $$ ANZ538-200800- Patapsco River including Baltimore Harbor- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 25 kt. Waves 1 ft. .TONIGHT...NW winds 10 to 15 kt with gusts to 20 kt... becoming W 5 to 10 kt after midnight. Waves 1 ft. Scattered sprinkles. .MON...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Scattered sprinkles. .MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .TUE...N winds 5 kt...becoming S in the afternoon. Waves 1 ft or less. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...W winds 5 to 10 kt...becoming N after midnight. Waves 1 ft or less. A chance of showers. .THU...W winds around 5 kt. Waves flat. $$ ANZ539-200800- Chester River to Queenstown MD- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...NW winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 to 10 kt after midnight. Waves 1 to 2 ft. Scattered sprinkles. .MON...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Scattered sprinkles. .MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...N winds 5 to 10 kt...becoming SW in the afternoon. Waves 1 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers. .WED...W winds 5 to 10 kt...becoming N after midnight. Waves 1 to 2 ft...subsiding to flat after midnight. A chance of showers. .THU...W winds around 5 kt. Waves flat. $$ ANZ532-200800- Chesapeake Bay from Sandy Point to North Beach- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY NIGHT... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...NW winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 to 10 kt after midnight. Waves 1 to 2 ft. Scattered sprinkles. .MON...NW winds 15 to 20 kt. Waves 2 ft. Scattered sprinkles. .MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...N winds 5 to 10 kt...becoming SE in the afternoon. Waves 1 ft. .TUE NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft. .WED...SW winds 10 to 15 kt...becoming NW 5 to 10 kt. Waves 2 to 3 ft...subsiding to 1 ft or less. A chance of showers. .THU...N winds 5 kt. Waves flat. $$ ANZ540-200800- Eastern Bay- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...NW winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 to 10 kt after midnight. Waves 1 to 2 ft. Scattered sprinkles. .MON...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Scattered sprinkles. .MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TUE...N winds 5 to 10 kt...becoming SW in the afternoon. Waves 1 ft. .TUE NIGHT...S winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft. .WED...W winds 5 to 10 kt...becoming NW after midnight. Waves 1 to 2 ft...subsiding to flat after midnight. A chance of showers. .THU...W winds around 5 kt. Waves flat. $$ ANZ533-200800- Chesapeake Bay from North Beach to Drum Point- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY NIGHT... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...NW winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 to 10 kt after midnight. Waves 1 to 2 ft. Scattered sprinkles. .MON...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. Scattered sprinkles. .MON NIGHT...N winds 15 to 20 kt. Waves 2 to 3 ft. .TUE...N winds 5 to 10 kt...becoming SE in the afternoon. Waves 1 to 2 ft. .TUE NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft. .WED...SW winds 10 to 15 kt...becoming NW 5 to 10 kt. Waves 2 to 3 ft...subsiding to 1 ft or less. A chance of showers. .THU...N winds 5 kt. Waves less than 1 ft. $$ ANZ541-200800- Choptank River to Cambridge MD and the Little Choptank River- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY NIGHT... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...NW winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 to 10 kt after midnight. Waves 1 to 2 ft. Scattered sprinkles. .MON...NW winds 15 to 20 kt. Waves 2 ft. Scattered sprinkles. .MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...N winds 5 to 10 kt...becoming SW in the afternoon. Waves 1 ft. .TUE NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .WED...SW winds 10 to 15 kt...becoming NW around 5 kt. Waves 1 to 2 ft...subsiding to flat after midnight. A chance of showers. .THU...NW winds around 5 kt. Waves 1 ft or less. $$ ANZ542-200800- Patuxent River to Broomes Island MD- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 20 kt. Waves 1 ft. .TONIGHT...NW winds 5 to 10 kt with gusts to 20 kt... becoming SW late. Waves 1 ft. .MON...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Scattered sprinkles. .MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .TUE...N winds 5 to 10 kt...becoming SE in the afternoon. Waves 1 ft. .TUE NIGHT...S winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. .WED...W winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of showers. .THU...N winds 5 kt. Waves less than 1 ft. $$ ANZ534-200800- Chesapeake Bay from Drum Point to Smith Point- 308 PM EDT Sun Apr 19 2026...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY NIGHT... .REST OF THIS AFTERNOON...NW winds 20 kt with gusts to 25 kt. Waves 4 ft. Scattered showers. .TONIGHT...NW winds 10 to 15 kt...becoming SW late. Gusts up to 20 kt. Waves 2 to 3 ft. .MON...NW winds 15 to 20 kt. Gusts up to 25 kt. Waves 3 ft. Scattered sprinkles. .MON NIGHT...N winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. .TUE...N winds 10 to 15 kt...becoming SE 5 to 10 kt in the afternoon. Waves 1 to 2 ft. .TUE NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. .WED...SW winds 15 to 20 kt...becoming NW 5 to 10 kt. Waves 2 to 3 ft...subsiding to 1 ft. A chance of showers. .THU...N winds 5 to 10 kt...becoming S. Waves 1 ft. $$ ANZ543-200800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 308 PM EDT Sun Apr 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY NIGHT... .REST OF THIS AFTERNOON...NW winds 20 kt with gusts to 25 kt. Waves 2 ft. Scattered showers. .TONIGHT...NW winds 10 to 15 kt...becoming S late. Gusts up to 20 kt. Waves 1 to 2 ft. .MON...W winds 10 to 15 kt...becoming NW 15 to 20 kt in the late morning and afternoon. Gusts up to 25 kt. Waves 2 ft. Scattered sprinkles. .MON NIGHT...N winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .TUE...N winds 10 to 15 kt...becoming SW 5 kt in the afternoon. Waves 1 ft. .TUE NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. .WED...SW winds 15 to 20 kt...becoming W 5 to 10 kt in the afternoon and evening, then becoming N after midnight. Waves 2 to 3 ft... subsiding to 1 ft. A chance of showers through the night. .THU...NW winds 5 to 10 kt...becoming S. Waves 1 ft or less. $$