Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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384 FZUS51 KLWX 282335 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 734 PM EDT Thu Aug 28 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. ANZ500-290800- 734 PM EDT Thu Aug 28 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A cold front will approach the region tonight, then cross the waters Friday. High pressure will return for the weekend. Small Craft Advisories may be needed in north to northwest flow Friday night. No marine hazards are expected this weekend into early next week as wedging high pressure settles nearby. $$ ANZ535-290800- Tidal Potomac from Key Bridge to Indian Head- 734 PM EDT Thu Aug 28 2025 .TONIGHT...S winds 5 kt. Waves less than 1 ft. .FRI...NW winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NW winds 5 kt. Waves less than 1 ft. .SAT...N winds 5 kt. Waves less than 1 ft. .SAT NIGHT...NE winds around 5 kt. Waves 1 ft. .SUN...NE winds around 5 kt. Waves 1 ft. .SUN NIGHT...NE winds around 5 kt. Waves 1 ft or less. .MON...E winds around 5 kt. Waves 1 ft. .TUE...E winds around 5 kt. Waves 1 ft. $$ ANZ536-290800- Tidal Potomac from Indian Head to Cobb Island- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EDT FRIDAY... .TONIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt until early morning. Waves 1 ft. .FRI...NW winds 5 kt. Waves less than 1 ft. .FRI NIGHT...N winds 5 kt. Waves less than 1 ft. .SAT...N winds around 5 kt. Waves 1 ft. .SAT NIGHT...NE winds around 5 kt. Waves 1 ft. .SUN...NE winds 5 kt. Waves less than 1 ft. .SUN NIGHT...N winds around 5 kt. Waves 1 ft. .MON...E winds around 5 kt. Waves 1 ft. .TUE...E winds around 5 kt. Waves 1 ft. $$ ANZ537-290800- Tidal Potomac from Cobb Island to Smith Point- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EDT FRIDAY... .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...NE winds 5 kt. Waves less than 1 ft. .MON...E winds 5 to 10 kt. Waves 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. $$ ANZ530-290800- Chesapeake Bay north of Pooles Island- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EDT FRIDAY... .TONIGHT...S winds 10 kt. Gusts up to 20 kt until early morning. Waves 1 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...N winds 5 kt. Waves less than 1 ft. .SUN...N winds 5 kt. Waves less than 1 ft. .SUN NIGHT...N winds 5 kt. Waves less than 1 ft. .MON...E winds around 5 kt. Waves 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. $$ ANZ531-290800- Chesapeake Bay from Pooles Island to Sandy Point- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY... .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 kt. Waves less than 1 ft. .SUN NIGHT...NE winds 5 kt. Waves less than 1 ft. .MON...E winds 5 to 10 kt. Waves 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. $$ ANZ538-290800- Patapsco River including Baltimore Harbor- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EDT FRIDAY... .TONIGHT...S winds 5 to 10 kt with gusts to 20 kt... becoming W late. Waves 1 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 kt. Waves less than 1 ft. .SAT NIGHT...NE winds around 5 kt. Waves flat. .SUN...NE winds 5 kt. Waves flat. .SUN NIGHT...NE winds around 5 kt. Waves flat. .MON...E winds around 5 kt. Waves 1 ft or less. .TUE...E winds around 5 kt. Waves 1 ft or less. $$ ANZ539-290800- Chester River to Queenstown MD- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EDT FRIDAY... .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .FRI...W winds 5 kt. Waves less than 1 ft. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds around 5 kt. Waves flat. .SUN...NE winds 5 kt. Waves less than 1 ft. .SUN NIGHT...NE winds around 5 kt. Waves flat. .MON...E winds 5 kt. Waves flat. .TUE...E winds 5 to 10 kt. Waves 1 ft or less. $$ ANZ532-290800- Chesapeake Bay from Sandy Point to North Beach- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY... .TONIGHT...S winds 10 to 15 kt with gusts to 25 kt. Waves 2 to 3 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...NE winds 5 kt. Waves less than 1 ft. .MON...E winds 5 to 10 kt. Waves 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. $$ ANZ540-290800- Eastern Bay- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EDT FRIDAY... .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds 5 kt. Waves flat. .SUN...NE winds 5 kt. Waves less than 1 ft. .SUN NIGHT...NE winds around 5 kt. Waves flat. .MON...E winds 5 kt. Waves less than 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft or less. $$ ANZ533-290800- Chesapeake Bay from North Beach to Drum Point- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY... .TONIGHT...S winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft. .FRI...NW winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...NE winds 5 kt. Waves less than 1 ft. .MON...NE winds 5 to 10 kt. Waves 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. $$ ANZ541-290800- Choptank River to Cambridge MD and the Little Choptank River- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EDT FRIDAY... .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...NE winds around 5 kt. Waves 1 ft or less. .MON...NE winds 5 to 10 kt. Waves 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. $$ ANZ542-290800- Patuxent River to Broomes Island MD- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EDT FRIDAY... .TONIGHT...S winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 1 ft. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds around 5 kt. Waves 1 ft. .SUN...NE winds 5 kt. Waves less than 1 ft. .SUN NIGHT...NE winds around 5 kt. Waves 1 ft. .MON...E winds 5 kt. Waves less than 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. $$ ANZ534-290800- Chesapeake Bay from Drum Point to Smith Point- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY... .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft. .FRI...W winds 5 to 10 kt. Waves 1 to 2 ft. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 to 2 ft. .SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...E winds 5 to 10 kt. Waves 1 ft. .MON...E winds 5 to 10 kt. Waves 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. $$ ANZ543-290800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 734 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY... .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NW winds 5 to 10 kt...becoming N late. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...E winds 5 to 10 kt. Waves 1 ft. .MON...E winds 5 to 10 kt. Waves 1 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. $$