618 FZUS51 KLWX 191808 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 208 PM EDT Sat Jul 19 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. ANZ500-200800- 208 PM EDT Sat Jul 19 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A stalled front moves north across the waters as a warm front today. A stronger cold front moves through the area Sunday night. Daily shower and thunderstorm chances continue through the weekend, with any stronger thunderstorm posing a risk to mariners. Drier conditions return for the start of next week as Canadian high pressure builds to the north. Small Craft Advisories may be needed Sunday evening into Monday morning. $$ ANZ535-200800- Tidal Potomac from Key Bridge to Indian Head- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .TONIGHT...S winds around 5 kt. Waves 1 ft or less. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds around 5 kt. Waves 1 ft. .SUN NIGHT...NW winds 5 kt. Waves less than 1 ft. .MON...N winds 5 kt. Waves less than 1 ft. .MON NIGHT...NE winds around 5 kt. Waves 1 ft. .TUE...E winds around 5 kt. Waves 1 ft. .WED...SE winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ536-200800- Tidal Potomac from Indian Head to Cobb Island- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...SE winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds around 5 kt. Waves 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds around 5 kt. Waves 1 ft. .SUN NIGHT...NW winds 5 kt. Waves less than 1 ft. .MON...N winds 5 kt. Waves less than 1 ft. .MON NIGHT...NE winds around 5 kt. Waves 1 ft. .TUE...NE winds around 5 kt. Waves 1 ft. .WED...SE winds 5 to 10 kt...becoming S after midnight. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ537-200800- Tidal Potomac from Cobb Island to Smith Point- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...SE winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .TONIGHT...S winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds 5 kt. Waves less than 1 ft. .SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft. .MON...N winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .WED...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ530-200800- Chesapeake Bay north of Pooles Island- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...SE winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .TONIGHT...S winds around 5 kt. Waves 1 ft. Scattered showers and tstms. Patchy fog. Vsby 1 NM or less. .SUN...W winds 5 to 10 kt. Waves 1 ft. Patchy fog. Vsby 1 to 3 NM. .SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .MON...N winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...N winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .WED...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-200800- Chesapeake Bay from Pooles Island to Sandy Point- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .TONIGHT...S winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .MON...N winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft. .WED...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-200800- Patapsco River including Baltimore Harbor- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...SE winds 5 kt. Waves less than 1 ft. Numerous showers and tstms. .TONIGHT...S winds around 5 kt. Waves 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds around 5 kt. Waves 1 ft. .SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .MON...N winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...N winds 5 kt. Waves less than 1 ft. .TUE...E winds around 5 kt. Waves 1 ft. .WED...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-200800- Chester River to Queenstown MD- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .TONIGHT...S winds around 5 kt. Waves 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds 5 kt. Waves less than 1 ft. .SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .MON...N winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft. .WED...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ532-200800- Chesapeake Bay from Sandy Point to North Beach- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. .TONIGHT...S winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds 5 kt. Waves less than 1 ft. .SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .MON...N 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...becoming SE after midnight. Waves 1 ft. .WED...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-200800- Eastern Bay- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. .TONIGHT...S winds around 5 kt. Waves 1 ft. Scattered showers and tstms. .SUN...W winds 5 kt. Waves less than 1 ft. .SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .MON...N winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft. .WED...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ533-200800- Chesapeake Bay from North Beach to Drum Point- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...SE winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds 5 to 10 kt. Waves 1 to 2 ft. .SUN NIGHT...NW winds 5 to 10 kt. Waves 2 ft. .MON...N winds 5 to 10 kt. Waves 2 to 3 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 2 ft. .TUE...NE winds 5 to 10 kt. Waves 1 to 2 ft. .WED...SE winds 5 to 10 kt. Waves 1 to 2 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ541-200800- Choptank River to Cambridge MD and the Little Choptank River- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds 5 kt. Waves less than 1 ft. .SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .MON...N winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .WED...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ542-200800- Patuxent River to Broomes Island MD- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...SE winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds around 5 kt. Waves 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds around 5 kt. Waves 1 ft. .SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .MON...N winds 5 to 10 kt. Waves 1 ft. .MON NIGHT...NE winds 5 kt. Waves less than 1 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .WED...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ534-200800- Chesapeake Bay from Drum Point to Smith Point- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...S winds 5 kt. Waves 1 to 2 ft. Scattered showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...W winds 5 to 10 kt. Waves 2 to 3 ft. .MON...N winds 10 kt. Waves 2 to 3 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 to 2 ft. .TUE...NE winds 5 to 10 kt. Waves 1 to 2 ft. .WED...SE winds 5 to 10 kt. Waves 1 to 2 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ543-200800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 208 PM EDT Sat Jul 19 2025 .THIS AFTERNOON...S winds 5 kt. Waves 2 ft. Scattered showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds 5 kt. Waves less than 1 ft. Scattered showers and tstms. Vsby 1 NM or less. .SUN...W winds 5 to 10 kt. Waves 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Waves 2 ft. .MON...N winds 10 kt. Waves 1 to 2 ft. .MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .TUE...NE winds 5 to 10 kt. Waves 1 ft. .WED...SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$