FZUS51 KLWX 081828 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 227 PM EDT Wed Jul 8 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. ANZ500-090800- 227 PM EDT Wed Jul 8 2026 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A frontal zone will meander about the Mid Atlantic through Friday. Another cold front will push south across the waters this weekend. Special Marine Warnings may be needed for strong to severe thunderstorms Thursday through Saturday. $$ ANZ535-090800- Tidal Potomac from Key Bridge to Indian Head- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...E winds 5 kt. Waves less than 1 ft. Isolated showers and tstms. .TONIGHT...S winds around 5 kt. Waves 1 ft. Scattered showers. .THU...S winds around 5 kt. Waves 1 ft. Showers with tstms likely. .THU NIGHT...SW winds around 5 kt. Waves 1 ft. Showers with tstms likely. .FRI...W winds around 5 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI NIGHT...NW winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds around 5 kt. Waves 1 ft. Showers likely through the night. A chance of tstms. A chance of showers after midnight. .SUN...E winds around 5 kt. Waves 1 ft or less. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ536-090800- Tidal Potomac from Indian Head to Cobb Island- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...E winds 5 kt. Waves less than 1 ft. Isolated showers and tstms. .TONIGHT...S winds 5 kt. Waves less than 1 ft. Scattered showers. .THU...S winds around 5 kt. Waves 1 ft. Showers with tstms likely. .THU NIGHT...W winds around 5 kt. Waves 1 ft. Showers with tstms likely. .FRI...W winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .FRI NIGHT...NW winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds around 5 kt. Waves 1 ft. Showers likely with a chance of tstms. .SUN...E winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ537-090800- Tidal Potomac from Cobb Island to Smith Point- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...E winds 5 kt. Waves less than 1 ft. Isolated showers and tstms. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Scattered showers. .THU...S winds 5 kt. Waves less than 1 ft. Showers and tstms likely. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers with tstms likely. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...W winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SAT...N winds 5 kt. Waves less than 1 ft. Showers likely through the night. A chance of tstms. A chance of showers after midnight. .SUN...E winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers in the morning. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ530-090800- Chesapeake Bay north of Pooles Island- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 kt. Waves less than 1 ft. Showers with tstms likely. .THU NIGHT...SW winds around 5 kt. Waves 1 ft. Showers with tstms likely. .FRI...W winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI NIGHT...NW winds around 5 kt. Waves 1 ft. A chance of showers. .SAT...N winds 5 kt. Waves less than 1 ft. A chance of showers and tstms through the night. .SUN...E winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-090800- Chesapeake Bay from Pooles Island to Sandy Point- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...SE winds 5 kt. Waves flat. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft or less. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers with tstms likely. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers with tstms likely. .FRI...W winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of tstms through the night. A chance of showers. .SUN...E winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-090800- Patapsco River including Baltimore Harbor- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...SE winds 5 kt. Waves flat. .TONIGHT...S winds 5 kt. Waves flat. .THU...S winds 5 to 10 kt. Waves 1 ft or less. Showers with tstms likely. .THU NIGHT...SW winds 5 kt. Waves flat. Showers with tstms likely. .FRI...W winds 5 to 10 kt. Waves 1 ft or less. Showers likely with a chance of tstms. .FRI NIGHT...NW winds 5 kt. Waves less than 1 ft. A chance of showers. .SAT...N winds 5 kt. Waves flat. A chance of tstms through the night. A chance of showers. .SUN...E winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-090800- Chester River to Queenstown MD- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...W winds 5 kt. Waves flat. .TONIGHT...S winds around 5 kt. Waves 1 ft or less. .THU...S winds 5 kt. Waves less than 1 ft. Showers and tstms likely. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers with tstms likely. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI NIGHT...NW winds around 5 kt. Waves 1 ft. A chance of showers. .SAT...N winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SUN...E winds around 5 kt. Waves 1 ft or less. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ532-090800- Chesapeake Bay from Sandy Point to North Beach- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...E winds 5 kt. Waves flat. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Scattered showers. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers with tstms likely. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .SAT...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .SUN...E winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-090800- Eastern Bay- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...W winds 5 kt. Waves flat. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers with tstms likely. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI NIGHT...NW winds 5 kt. Waves less than 1 ft. A chance of showers. .SAT...N winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SUN...E winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ533-090800- Chesapeake Bay from North Beach to Drum Point- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...NE winds 5 kt. Waves flat. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Scattered showers. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers with tstms likely. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds 5 to 10 kt. Waves 1 ft. Showers likely through the night. A chance of tstms. A chance of showers after midnight. .SUN...E winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ541-090800- Choptank River to Cambridge MD and the Little Choptank River- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...NW winds 5 kt. Waves flat. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Scattered showers. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers with tstms likely. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI NIGHT...NW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance of tstms. .SUN...E winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ542-090800- Patuxent River to Broomes Island MD- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...E winds 5 kt. Waves less than 1 ft. .TONIGHT...S winds 5 kt. Waves less than 1 ft. Scattered showers. .THU...S winds around 5 kt. Waves 1 ft. Showers and tstms likely. .THU NIGHT...SW winds around 5 kt. Waves 1 ft. Showers with tstms likely. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...NW winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms through the night. .SUN...E winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ534-090800- Chesapeake Bay from Drum Point to Smith Point- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...E winds 5 kt. Waves less than 1 ft. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Scattered showers. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft. Showers likely through the night. A chance of tstms. A chance of showers after midnight. .SUN...E winds 5 to 10 kt. Waves 1 to 2 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ543-090800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 227 PM EDT Wed Jul 8 2026 .THIS AFTERNOON...W winds 5 kt. Waves flat. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft. Showers likely with a chance of tstms. .SUN...E winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$