FZUS51 KLWX 080908 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 508 AM 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. ANZ500-082100- 508 AM EDT Wed Jul 8 2026 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A cold front currently south of I-64 will continue drop southward into North Carolina today. This system is expected to gradually return northward as a warm front by Thursday. Another cold front will track across the waters on Saturday into Sunday morning. Special Marine Warnings will be needed at times during the period. $$ ANZ535-082100- Tidal Potomac from Key Bridge to Indian Head- 508 AM EDT Wed Jul 8 2026 .TODAY...E winds 5 kt. Waves less than 1 ft. Scattered showers, mainly this morning. .TONIGHT...S winds around 5 kt. Waves 1 ft. Scattered showers. .THU...S winds around 5 kt. Waves 1 ft. Showers with a chance of tstms. .THU NIGHT...W winds around 5 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI...W winds around 5 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI NIGHT...W winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds around 5 kt. Waves 1 ft. A chance of showers and tstms through the night. .SUN...E winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ536-082100- Tidal Potomac from Indian Head to Cobb Island- 508 AM EDT Wed Jul 8 2026 .TODAY...E winds 5 kt. Waves less than 1 ft. Scattered showers this morning, then scattered showers with isolated tstms this afternoon. .TONIGHT...S winds around 5 kt. Waves 1 ft. Scattered showers. .THU...S winds around 5 kt. Waves 1 ft. Showers likely with a chance of tstms. .THU NIGHT...W winds around 5 kt. Waves 1 ft. Showers with a chance of tstms. .FRI...W winds around 5 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...W winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds around 5 kt. Waves 1 ft. A chance of showers. A chance of tstms through the night. .SUN...E winds 5 to 10 kt...becoming SE. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ537-082100- Tidal Potomac from Cobb Island to Smith Point- 508 AM EDT Wed Jul 8 2026 .TODAY...E winds 5 to 10 kt...becoming SE late. Waves 1 ft. Scattered showers this morning. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Scattered showers. .THU...S winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...W winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SAT...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft. A chance of showers and tstms through the night. .SUN...E winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ530-082100- Chesapeake Bay north of Pooles Island- 508 AM EDT Wed Jul 8 2026 .TODAY...E winds 5 to 10 kt until late afternoon...becoming light. Waves 1 ft or less. .TONIGHT...S winds around 5 kt. Waves 1 ft. .THU...S winds 5 kt. Waves less than 1 ft. Showers with a chance of tstms. .THU NIGHT...SW winds around 5 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI NIGHT...W winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds around 5 kt. Waves 1 ft. A chance of showers through the night. .SUN...E winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-082100- Chesapeake Bay from Pooles Island to Sandy Point- 508 AM EDT Wed Jul 8 2026 .TODAY...NE winds 5 to 10 kt...becoming S late. Waves 1 ft or less. Isolated showers this morning. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI NIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .SAT...NE winds 5 to 10 kt. Waves 1 ft. .SUN...E winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-082100- Patapsco River including Baltimore Harbor- 508 AM EDT Wed Jul 8 2026 .TODAY...E winds 5 to 10 kt...becoming SE late. Waves 1 ft or less. Isolated showers this morning. .TONIGHT...S winds 5 kt. Waves flat. Scattered showers and tstms. .THU...S winds 5 kt. Waves less than 1 ft. Showers with a chance of tstms. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers with a chance of tstms. .FRI...W winds 5 to 10 kt. Waves 1 ft or less. Showers likely with a chance of tstms. .FRI NIGHT...W winds 5 kt. Waves less than 1 ft. .SAT...NE winds 5 kt. Waves less than 1 ft. .SUN...E winds around 5 kt. Waves 1 ft or less. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-082100- Chester River to Queenstown MD- 508 AM EDT Wed Jul 8 2026 .TODAY...NE winds 5 to 10 kt until late afternoon... becoming light. Waves 1 ft or less. .TONIGHT...S winds around 5 kt. Waves 1 ft or less. .THU...S winds 5 kt. Waves less than 1 ft. Showers with a chance of tstms. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI NIGHT...NW winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft or less. .SUN...E winds 5 kt. Waves flat. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ532-082100- Chesapeake Bay from Sandy Point to North Beach- 508 AM EDT Wed Jul 8 2026 .TODAY...NE winds 5 to 10 kt...becoming SE late. Waves 1 ft or less. Isolated showers this morning. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Scattered showers and tstms. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers with a chance of tstms. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 to 10 kt. Waves 1 ft. Showers likely. .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 E after midnight. Waves 1 ft. .SUN...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-082100- Eastern Bay- 508 AM EDT Wed Jul 8 2026 .TODAY...NE winds 5 to 10 kt...becoming SW late. Waves 1 ft or less. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 kt. Waves less than 1 ft. Showers with a chance of tstms. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...NW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SAT...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft or less. .SUN...E winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ533-082100- Chesapeake Bay from North Beach to Drum Point- 508 AM EDT Wed Jul 8 2026 .TODAY...NE winds 5 to 10 kt...becoming SE late. Waves 1 ft or less. Isolated showers this morning. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Scattered showers and tstms. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers with a chance of tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI...W winds 5 kt. Waves less than 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 E after midnight. Waves 1 ft. A chance of showers and 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. $$ ANZ541-082100- Choptank River to Cambridge MD and the Little Choptank River- 508 AM EDT Wed Jul 8 2026 .TODAY...NE winds 5 to 10 kt...becoming SW late. Waves 1 ft or less. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Scattered showers and tstms. .THU...S winds 5 kt. Waves less than 1 ft. Showers with a chance of tstms. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...W winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SAT...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft. A chance of showers and tstms through the night. .SUN...E winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ542-082100- Patuxent River to Broomes Island MD- 508 AM EDT Wed Jul 8 2026 .TODAY...E winds 5 kt. Waves less than 1 ft. Isolated showers this morning. .TONIGHT...S winds 5 kt. Waves less than 1 ft. Scattered showers. .THU...S winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers with a chance of tstms. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...W winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft. A chance of showers. 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. $$ ANZ534-082100- Chesapeake Bay from Drum Point to Smith Point- 508 AM EDT Wed Jul 8 2026 .TODAY...E winds 5 to 10 kt...becoming SE late. Waves 1 ft. Scattered showers this morning. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .SAT...N winds 5 to 10 kt...becoming E after midnight. Waves 1 ft. A chance of showers and tstms through the night. .SUN...E winds 5 to 10 kt. Waves 1 to 2 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ543-082100- Tangier Sound and the inland waters surrounding Bloodsworth Island- 508 AM EDT Wed Jul 8 2026 .TODAY...E winds 5 to 10 kt...becoming S late. Waves 1 ft. Isolated showers this morning. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and 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 E after midnight. Waves 1 ft. A chance of showers. 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. $$