Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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546 FZUS51 KLWX 221919 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 319 PM EDT Wed Jul 22 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. ANZ500-230800- 319 PM EDT Wed Jul 22 2026 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... High pressure will build in from the west for the end of the week. The next frontal system may approach by early next week. $$ ANZ535-230800- Tidal Potomac from Key Bridge to Indian Head- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...NW winds 10 kt with gusts to 20 kt. Waves 1 ft. Numerous showers and scattered tstms. .TONIGHT...N winds 5 to 10 kt. Gusts up to 20 kt early in the evening. Waves 1 ft. Scattered showers and tstms. .THU...N winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...NE winds around 5 kt. Waves 1 ft or less. .FRI...E winds around 5 kt. Waves 1 ft. .FRI NIGHT...E winds around 5 kt. Waves 1 ft or less. .SAT...SE winds around 5 kt. Waves 1 ft or less. .SUN...S winds around 5 kt. Waves 1 ft. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ536-230800- Tidal Potomac from Indian Head to Cobb Island- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...W winds 10 kt with gusts to 20 kt. Waves 1 ft. Numerous showers and scattered tstms. .TONIGHT...SW winds 5 to 10 kt...becoming N in the late evening and overnight. Gusts up to 20 kt. Waves 1 ft. Scattered showers and tstms. .THU...N winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...NE winds around 5 kt. Waves 1 ft or less. .FRI...E winds around 5 kt. Waves 1 ft. .FRI NIGHT...E winds around 5 kt. Waves 1 ft. .SAT...SE winds around 5 kt. Waves 1 ft or less. .SUN...S winds around 5 kt. Waves 1 ft or less. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ537-230800- Tidal Potomac from Cobb Island to Smith Point- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF THIS AFTERNOON...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. Numerous showers and scattered tstms. .TONIGHT...W winds 5 to 10 kt...becoming N 10 to 15 kt after midnight. Gusts up to 20 kt. Waves 1 to 2 ft. Showers and scattered tstms. .THU...N winds 10 to 15 kt. Gusts up to 20 kt until late afternoon. Waves 1 to 2 ft. A chance of showers. .THU NIGHT...NE winds 5 kt. Waves less than 1 ft. .FRI...E winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. .SAT...E winds 5 to 10 kt...becoming S after midnight. Waves 1 ft. .SUN...S winds around 5 kt. Waves 1 ft or less. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ530-230800- Chesapeake Bay north of Pooles Island- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF THIS AFTERNOON...W winds 10 kt with gusts to 20 kt. Waves 1 ft. Scattered showers with isolated tstms. .TONIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .THU...N winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...E winds around 5 kt. Waves flat. .FRI...E winds around 5 kt. Waves flat. .FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft or less. .SAT...SE winds around 5 kt. Waves flat. .SUN...S winds around 5 kt. Waves 1 ft or less. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-230800- Chesapeake Bay from Pooles Island to Sandy Point- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF THIS AFTERNOON...NW winds 10 kt with gusts to 20 kt. Waves 1 ft. Scattered showers with isolated tstms. .TONIGHT...NW winds 10 to 15 kt...becoming N after midnight. Gusts up to 20 kt. Waves 1 to 2 ft. Scattered showers and tstms. .THU...N winds 10 to 15 kt with gusts to 20 kt... becoming NE 5 kt late. Waves 1 to 2 ft. .THU NIGHT...E winds around 5 kt. Waves flat. .FRI...E winds around 5 kt. Waves 1 ft. .FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. .SAT...E winds 5 kt...becoming S. Waves 1 ft. .SUN...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-230800- Patapsco River including Baltimore Harbor- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...NW winds 15 kt with gusts to 20 kt. Waves 1 ft. Scattered showers with isolated tstms. .TONIGHT...N winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. Scattered showers. .THU...NE winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...E winds around 5 kt. Waves flat. .FRI...E winds around 5 kt. Waves 1 ft or less. .FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. .SAT...SE winds around 5 kt. Waves flat. .SUN...S winds around 5 kt. Waves 1 ft or less. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-230800- Chester River to Queenstown MD- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF THIS AFTERNOON...NW winds 10 kt with gusts to 20 kt. Waves 1 ft. Scattered showers and tstms. .TONIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to 2 ft. Scattered showers and tstms. .THU...N winds 10 to 15 kt...diminishing to 5 kt in the afternoon. Waves 1 to 2 ft. .THU NIGHT...E winds around 5 kt. Waves flat. .FRI...E winds around 5 kt. Waves 1 ft or less. .FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft or less. .SAT...SE winds around 5 kt. Waves flat. .SUN...S winds around 5 kt. Waves 1 ft or less. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ532-230800- Chesapeake Bay from Sandy Point to North Beach- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF THIS AFTERNOON...W winds 10 kt with gusts to 20 kt. Waves 1 ft. Scattered showers and tstms. .TONIGHT...NW winds 5 to 10 kt...becoming N 15 kt after midnight. Gusts up to 20 kt. Waves 1 to 2 ft. Scattered showers and tstms. .THU...N winds 10 to 15 kt with gusts to 20 kt... becoming NE 5 kt late. Waves 1 to 2 ft. .THU NIGHT...E winds around 5 kt. Waves 1 ft or less. .FRI...E winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. .SAT...E winds around 5 kt. Waves 1 ft. .SUN...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-230800- Eastern Bay- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF THIS AFTERNOON...W winds 10 kt with gusts to 20 kt. Waves 1 ft. Scattered showers and tstms. .TONIGHT...NW winds 10 to 15 kt...becoming N late. Gusts up to 20 kt. Waves 1 to 2 ft. Scattered showers and tstms. .THU...N winds 10 to 15 kt with gusts to 20 kt... diminishing to 5 kt late. Waves 1 ft. .THU NIGHT...E winds around 5 kt. Waves flat. .FRI...E winds around 5 kt. Waves 1 ft. .FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft or less. .SAT...E winds around 5 kt. Waves 1 ft or less. .SUN...S winds around 5 kt. Waves 1 ft or less. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ533-230800- Chesapeake Bay from North Beach to Drum Point- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF THIS AFTERNOON...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. Numerous showers and scattered tstms. .TONIGHT...W winds 5 to 10 kt...becoming N 15 to 20 kt after midnight. Waves 1 ft...building to 3 ft after midnight. Scattered showers and tstms. .THU...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft. .THU NIGHT...E winds 5 kt. Waves less than 1 ft. .FRI...E winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. .SAT...E winds around 5 kt. Waves 1 ft. .SUN...SE winds 5 to 10 kt...becoming SW after midnight. Waves 1 ft or less. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ541-230800- Choptank River to Cambridge MD and the Little Choptank River- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF THIS AFTERNOON...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. Scattered showers and tstms. .TONIGHT...W winds 5 to 10 kt...becoming N 10 to 15 kt after midnight. Gusts up to 20 kt. Waves 1 to 2 ft. Numerous showers and scattered tstms. .THU...N winds 10 to 15 kt with gusts to 20 kt... diminishing to 5 kt late. Waves 1 to 2 ft. .THU NIGHT...E winds 5 kt. Waves less than 1 ft. .FRI...E winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. .SAT...E winds around 5 kt. Waves 1 ft or less. .SUN...S winds 5 to 10 kt. Waves 1 ft or less. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ542-230800- Patuxent River to Broomes Island MD- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. Numerous showers and scattered tstms. .TONIGHT...W winds 5 to 10 kt with gusts to 20 kt... becoming N with gusts to 20 kt after midnight. Waves 1 ft. Showers and scattered tstms. .THU...N winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...NE winds around 5 kt. Waves 1 ft. .FRI...E winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. .SAT...E winds around 5 kt. Waves 1 ft. .SUN...SE winds around 5 kt. Waves 1 ft. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ534-230800- Chesapeake Bay from Drum Point to Smith Point- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF THIS AFTERNOON...SW winds 10 kt with gusts to 20 kt. Waves 2 ft. Showers and scattered tstms. .TONIGHT...SW winds 5 to 10 kt...becoming N 10 to 15 kt after midnight. Gusts up to 20 kt. Waves 2 to 3 ft. Showers and scattered tstms. .THU...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft. A chance of showers. .THU NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .FRI...E winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. .SAT...E winds 5 to 10 kt. Waves 1 ft. .SUN...E winds 5 kt...becoming S. Waves 1 ft or less. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ543-230800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 319 PM EDT Wed Jul 22 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .REST OF THIS AFTERNOON...SW winds 15 kt with gusts to 20 kt. Waves 2 ft. Showers and scattered tstms. .TONIGHT...SW winds 5 to 10 kt...becoming N 10 to 15 kt after midnight. Gusts up to 20 kt. Waves 1 to 2 ft. Showers and scattered tstms. .THU...N winds 10 to 15 kt. Gusts up to 20 kt until late afternoon. Waves 1 to 2 ft. A chance of showers. .THU NIGHT...E winds 5 to 10 kt. Waves 1 ft. .FRI...NE winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .SAT...E winds 5 to 10 kt. Waves 1 ft or less. .SUN...SE winds 5 kt...becoming S. Waves 1 ft or less. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$