Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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674 FZUS51 KLWX 230534 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 134 AM EDT Tue Sep 23 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. ANZ500-232000- 134 AM EDT Tue Sep 23 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... High pressure will drift east of the waters tonight. A cold front and cutoff low pressure system will approach the waters from the west Tuesday before stalling over the waters mid to late week. Small Craft Advisories may be needed Thursday evening into Friday. $$ ANZ535-232000- Tidal Potomac from Key Bridge to Indian Head- 134 AM EDT Tue Sep 23 2025 .OVERNIGHT...S winds 5 kt. Waves less than 1 ft. .TUE...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. Vsby 1 NM or less. .TUE NIGHT...SW winds 5 to 10 kt until early morning... becoming light. Waves 1 ft. .WED...SW winds around 5 kt. Waves 1 ft or less. .WED NIGHT...S winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .FRI...NW winds around 5 kt. Waves 1 ft. Showers likely in the morning. A chance of showers. .SAT...W winds around 5 kt. Waves 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ536-232000- Tidal Potomac from Indian Head to Cobb Island- 134 AM EDT Tue Sep 23 2025 .OVERNIGHT...S winds 10 kt. Waves 1 ft. .TUE...S winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .WED...W winds around 5 kt. Waves 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .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. Showers likely with a chance of tstms. .FRI...NW winds 5 kt. Waves less than 1 ft. Showers likely . .SAT...E winds around 5 kt. Waves 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ537-232000- Tidal Potomac from Cobb Island to Smith Point- 134 AM EDT Tue Sep 23 2025 .OVERNIGHT...S winds 10 kt. Waves 1 ft. .TUE...S winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. .WED...SW winds 5 kt. Waves less than 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 to 10 kt...becoming N. Waves 1 ft. Showers likely . .SAT...NE winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ530-232000- Chesapeake Bay north of Pooles Island- 134 AM EDT Tue Sep 23 2025 .OVERNIGHT...S winds 10 kt. Waves 1 ft. .TUE...SW winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. Vsby 1 NM or less. .WED...W winds around 5 kt. Waves 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .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. Showers with a chance of tstms. .FRI...W winds 5 kt. Waves less than 1 ft. Showers likely, mainly in the morning. .SAT...W winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-232000- Chesapeake Bay from Pooles Island to Sandy Point- 134 AM EDT Tue Sep 23 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING... .OVERNIGHT...S winds 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...S winds 10 kt with gusts to 20 kt. Waves 2 ft. .TUE NIGHT...SW winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers. Vsby 1 NM or less. .WED...SW winds 5 kt. Waves less than 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers with a chance of tstms. .FRI...W winds 5 to 10 kt. Waves 1 ft or less. Showers likely in the morning. A chance of showers. .SAT...SW winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-232000- Patapsco River including Baltimore Harbor- 134 AM EDT Tue Sep 23 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING... .OVERNIGHT...S winds 10 kt with gusts to 20 kt. Waves 1 ft. .TUE...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. Vsby 1 NM or less. .TUE NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. A chance of showers. Vsby 1 NM or less. .WED...SW winds around 5 kt. Waves flat. .WED NIGHT...S winds 5 kt. Waves less than 1 ft. Showers likely. .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. Showers with a chance of tstms. .FRI...W winds 5 kt. Waves flat. Showers likely in the morning. A chance of showers. .SAT...SW winds 5 kt. Waves flat. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-232000- Chester River to Queenstown MD- 134 AM EDT Tue Sep 23 2025 .OVERNIGHT...S winds 10 kt. Waves 1 ft. .TUE...S winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. .WED...W winds 5 kt. Waves flat. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft or less. Showers likely with a chance of tstms. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers with a chance of tstms. .FRI...W winds 5 kt. Waves less than 1 ft. Showers likely . .SAT...W winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ532-232000- Chesapeake Bay from Sandy Point to North Beach- 134 AM EDT Tue Sep 23 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING... .OVERNIGHT...S winds 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE NIGHT...SW winds 5 to 10 kt. Waves 1 to 2 ft. .WED...SW winds 5 kt. Waves less than 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .THU...S winds 10 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 to 2 ft. Showers with a chance of tstms. .FRI...W winds 5 to 10 kt. Waves 1 ft. Showers likely . .SAT...NW winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-232000- Eastern Bay- 134 AM EDT Tue Sep 23 2025 .OVERNIGHT...S winds 10 kt. Waves 1 ft. .TUE...S winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. .WED...SW winds 5 kt. Waves flat. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft or less. Showers likely with a chance of tstms. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers with a chance of tstms. .FRI...W winds 5 to 10 kt. Waves 1 ft or less. Showers likely . .SAT...W winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ533-232000- Chesapeake Bay from North Beach to Drum Point- 134 AM EDT Tue Sep 23 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING... .OVERNIGHT...S winds 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE NIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt late. Waves 1 to 2 ft. .WED...SW winds around 5 kt. Waves 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .THU...S winds 10 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms. .THU NIGHT...SW winds 10 kt. Waves 1 to 2 ft. Showers with a chance of tstms. .FRI...W winds 5 to 10 kt. Waves 1 ft. Showers likely . .SAT...N winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ541-232000- Choptank River to Cambridge MD and the Little Choptank River- 134 AM EDT Tue Sep 23 2025 .OVERNIGHT...S winds 10 kt. Waves 1 ft. .TUE...S winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 10 to 15 kt. Waves 1 ft. .WED...SW winds 5 kt. Waves less than 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .THU...S winds 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers with a chance of tstms. .FRI...W winds 5 to 10 kt. Waves 1 ft. Showers likely . .SAT...W winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ542-232000- Patuxent River to Broomes Island MD- 134 AM EDT Tue Sep 23 2025 .OVERNIGHT...S winds 5 kt. Waves less than 1 ft. .TUE...S winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. .WED...SW winds around 5 kt. Waves 1 ft. .WED NIGHT...S winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .THU NIGHT...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 kt. Waves less than 1 ft. Showers likely . .SAT...NE winds 5 kt. Waves less than 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ534-232000- Chesapeake Bay from Drum Point to Smith Point- 134 AM EDT Tue Sep 23 2025 .OVERNIGHT...S winds 15 kt. Waves 2 ft. .TUE...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt until early morning. Waves 2 ft. .WED...S winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers and tstms. .THU...S winds 10 to 15 kt. Waves 2 ft. A chance of showers. .THU NIGHT...SW winds 10 to 15 kt. Waves 2 ft. Showers likely with a chance of tstms. .FRI...W winds 5 to 10 kt...becoming N. Waves 1 ft. Showers likely . .SAT...N winds 5 to 10 kt...becoming SW. Waves 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ543-232000- Tangier Sound and the inland waters surrounding Bloodsworth Island- 134 AM EDT Tue Sep 23 2025 .OVERNIGHT...S winds 10 kt. Waves 1 ft. .TUE...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .TUE NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt until early morning. Waves 1 ft. .WED...SW winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .THU...S winds 10 to 15 kt. Waves 1 ft. A chance of showers. .THU NIGHT...SW winds 10 to 15 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI...W winds 5 to 10 kt...becoming N. Waves 1 ft. Showers likely . .SAT...N winds 5 to 10 kt...becoming SW. Waves 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$