Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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856 FZUS51 KLWX 161136 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 735 AM EDT Wed Jul 16 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. ANZ500-162000- 735 AM EDT Wed Jul 16 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A frontal system will stall over the region this morning before dissipating. A cold front approaches from the west Friday evening before crossing the waters by early Saturday. Thereafter, this front may stall nearby. Small Craft Advisories may be needed Wednesday evening into Thursday, particularly across the southern waters. $$ ANZ535-162000- Tidal Potomac from Key Bridge to Indian Head- 735 AM EDT Wed Jul 16 2025 .TODAY...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms this afternoon with vsby 1 NM or less. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. Vsby 1 NM or less. .THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. .FRI...NW winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .FRI NIGHT...N winds around 5 kt. Waves 1 ft or less. .SAT...SE winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms. .SUN...W winds around 5 kt. Waves 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ536-162000- Tidal Potomac from Indian Head to Cobb Island- 735 AM EDT Wed Jul 16 2025 .TODAY...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms this afternoon with vsby 1 NM or less. .TONIGHT...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...NW 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...SE winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .SUN...W winds around 5 kt. Waves 1 ft. Showers likely through the night. A chance of tstms. A chance of showers after midnight. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ537-162000- Tidal Potomac from Cobb Island to Smith Point- 735 AM EDT Wed Jul 16 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY AFTERNOON... .TODAY...SW winds 10 kt. Waves 1 ft. A slight chance of showers and tstms this morning, then a chance of showers and tstms this afternoon with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt late. Waves 1 to 2 ft. A chance of showers and tstms. .THU...SW winds 10 to 15 kt. Gusts up to 25 kt until late afternoon. Waves 2 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI NIGHT...NW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SAT...SE winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SUN...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ530-162000- Chesapeake Bay north of Pooles Island- 735 AM EDT Wed Jul 16 2025 .TODAY...S winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely this afternoon with vsby 1 NM or less. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely. Vsby 1 NM or less. .THU...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A chance of showers and tstms. .THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. .FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI NIGHT...N winds 5 kt. Waves less than 1 ft. .SAT...S winds 5 kt. Waves less than 1 ft. A chance of showers. A chance of tstms through the night. .SUN...W winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-162000- Chesapeake Bay from Pooles Island to Sandy Point- 735 AM EDT Wed Jul 16 2025 .TODAY...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms this afternoon. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers and tstms likely. Vsby 1 NM or less. .THU...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A chance of showers. .THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. .FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI NIGHT...N winds 5 kt. Waves less than 1 ft. .SAT...SE winds 5 kt. Waves flat. A chance of showers. A chance of tstms through the night. .SUN...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-162000- Patapsco River including Baltimore Harbor- 735 AM EDT Wed Jul 16 2025 .TODAY...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms this afternoon. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. .THU NIGHT...W winds 5 to 10 kt. Waves 1 ft or less. .FRI...NW winds 5 kt. Waves flat. A chance of showers and tstms. .FRI NIGHT...N winds around 5 kt. Waves flat. .SAT...SE winds around 5 kt. Waves flat. A chance of showers. A chance of tstms through the night. .SUN...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-162000- Chester River to Queenstown MD- 735 AM EDT Wed Jul 16 2025 .TODAY...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms this afternoon. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers and tstms likely. Vsby 1 NM or less. .THU...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A chance of showers. .THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. .FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI NIGHT...N winds around 5 kt. Waves 1 ft or less. A chance of showers. .SAT...SE winds 5 kt. Waves flat. A chance of showers. A chance of tstms through the night. .SUN...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ532-162000- Chesapeake Bay from Sandy Point to North Beach- 735 AM EDT Wed Jul 16 2025 .TODAY...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms this afternoon with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers and tstms likely. Vsby 1 NM or less. .THU...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. .FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI NIGHT...N winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SAT...SE winds 5 kt. Waves less than 1 ft. A chance of showers. A chance of tstms through the night. .SUN...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-162000- Eastern Bay- 735 AM EDT Wed Jul 16 2025 .TODAY...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms this afternoon with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers and tstms likely. Vsby 1 NM or less. .THU...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. .FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI NIGHT...N winds 5 kt. Waves flat. A chance of showers and tstms. .SAT...SE winds around 5 kt. Waves flat. A chance of showers. A chance of tstms through the night. .SUN...W winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ533-162000- Chesapeake Bay from North Beach to Drum Point- 735 AM EDT Wed Jul 16 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY AFTERNOON... .TODAY...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms this afternoon with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU...SW winds 10 to 15 kt. Gusts up to 25 kt until late afternoon. Waves 2 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI NIGHT...N winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SAT...SE winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SUN...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ541-162000- Choptank River to Cambridge MD and the Little Choptank River- 735 AM EDT Wed Jul 16 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY AFTERNOON... .TODAY...S winds 5 to 10 kt. Waves 1 ft. A slight chance of showers this morning, then a chance of showers and tstms this afternoon with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU...SW winds 10 to 15 kt. Gusts up to 25 kt until late afternoon. Waves 2 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI NIGHT...N winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SAT...E winds 5 kt. Waves less than 1 ft. A chance of showers. A chance of tstms through the night. .SUN...W winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ542-162000- Patuxent River to Broomes Island MD- 735 AM EDT Wed Jul 16 2025 .TODAY...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms this afternoon. .TONIGHT...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI NIGHT...N winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .SAT...SE winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .SUN...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ534-162000- Chesapeake Bay from Drum Point to Smith Point- 735 AM EDT Wed Jul 16 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY AFTERNOON... .TODAY...SW winds 10 kt. Waves 1 to 2 ft. A slight chance of showers and tstms this morning, then a chance of showers and tstms this afternoon with vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU...SW winds 15 to 20 kt with gusts to 25 kt... diminishing to 10 kt late. Waves 3 ft. .THU NIGHT...SW winds 10 to 15 kt. Waves 2 ft. .FRI...NW winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers and tstms. .FRI NIGHT...NW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SAT...SE winds 5 kt...becoming S after midnight. Waves 1 ft. A chance of showers. A chance of tstms. .SUN...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ543-162000- Tangier Sound and the inland waters surrounding Bloodsworth Island- 735 AM EDT Wed Jul 16 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY AFTERNOON... .TODAY...SW winds 10 kt. Waves 1 ft. A slight chance of showers and tstms this morning, then a chance of showers and tstms this afternoon with vsby 1 NM or less. .TONIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .THU NIGHT...SW winds 10 to 15 kt. Waves 1 ft. .FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI NIGHT...N winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .SAT...SE winds 5 kt...becoming S. Waves 1 ft or less. A chance of showers. A chance of tstms. .SUN...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance of tstms. Winds and waves higher and visibilities lower in and near tstms. $$