Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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232 FZUS51 KLWX 281736 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 135 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- 135 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. $$ ANZ535-290800- Tidal Potomac from Key Bridge to Indian Head- 135 PM EDT Thu Aug 28 2025 .THIS AFTERNOON...S winds 5 to 10 kt. Waves 1 ft. .TONIGHT...S winds around 5 kt. Waves 1 ft. .FRI...NW winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NW winds 5 kt. Waves less than 1 ft. .SAT...N winds 5 kt. Waves less than 1 ft. .SAT NIGHT...NE winds around 5 kt. Waves 1 ft. .SUN...NE winds around 5 kt. Waves 1 ft. .MON...E winds around 5 kt. Waves 1 ft in the morning. $$ ANZ536-290800- Tidal Potomac from Indian Head to Cobb Island- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 1 AM EDT FRIDAY... .THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft. .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 around 5 kt. Waves 1 ft. .MON...E winds around 5 kt. Waves 1 ft in the morning. $$ ANZ537-290800- Tidal Potomac from Cobb Island to Smith Point- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 1 AM EDT FRIDAY... .THIS AFTERNOON...SW winds 10 kt. Waves 1 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .MON...E winds 5 to 10 kt. Waves 1 ft in the morning. $$ ANZ530-290800- Chesapeake Bay north of Pooles Island- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 1 AM EDT FRIDAY... .THIS AFTERNOON...SW winds 10 kt. Waves 1 ft. .TONIGHT...S winds 10 to 15 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 flat. .SUN...N winds 5 kt. Waves flat. .MON...E winds around 5 kt. Waves flat in the morning. $$ ANZ531-290800- Chesapeake Bay from Pooles Island to Sandy Point- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...S winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt late. Gusts up to 20 kt. Waves 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 kt. Waves less than 1 ft. .MON...E winds 5 to 10 kt. Waves flat in the morning. $$ ANZ538-290800- Patapsco River including Baltimore Harbor- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 1 AM EDT FRIDAY... .THIS AFTERNOON...S winds 5 to 10 kt. Waves 1 ft. .TONIGHT...SW winds 5 to 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 kt. Waves less than 1 ft. .SAT NIGHT...NE winds around 5 kt. Waves flat. .SUN...NE winds around 5 kt. Waves flat. .MON...E winds around 5 kt. Waves flat in the morning. $$ ANZ539-290800- Chester River to Queenstown MD- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 1 AM EDT FRIDAY... .THIS AFTERNOON...SW winds 10 kt. Waves 1 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt late. Gusts up to 20 kt. Waves 2 ft. .FRI...W winds 5 kt. Waves less than 1 ft. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds around 5 kt. Waves flat. .SUN...NE winds around 5 kt. Waves 1 ft or less. .MON...E winds 5 kt. Waves flat in the morning. $$ ANZ532-290800- Chesapeake Bay from Sandy Point to North Beach- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt late. Gusts up to 25 kt until early morning. 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. .MON...E winds 5 to 10 kt. Waves flat in the morning. $$ ANZ540-290800- Eastern Bay- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 1 AM EDT FRIDAY... .THIS AFTERNOON...S winds 10 kt. Waves 1 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt late. Gusts up to 20 kt. Waves 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds 5 kt. Waves flat. .SUN...NE winds around 5 kt. Waves 1 ft or less. .MON...E winds 5 kt. Waves flat in the morning. $$ ANZ533-290800- Chesapeake Bay from North Beach to Drum Point- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW late. Gusts up 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. .MON...NE winds 5 to 10 kt. Waves 1 ft in the morning. $$ ANZ541-290800- Choptank River to Cambridge MD and the Little Choptank River- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 1 AM EDT FRIDAY... .THIS AFTERNOON...S winds 10 kt. Waves 1 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt late. Gusts up to 20 kt. Waves 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...NE winds 5 kt. Waves less than 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .MON...NE winds 5 to 10 kt. Waves flat in the morning. $$ ANZ542-290800- Patuxent River to Broomes Island MD- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 1 AM EDT FRIDAY... .THIS AFTERNOON...S winds 10 kt. Waves 1 ft. .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 around 5 kt. Waves 1 ft. .MON...E winds 5 kt. Waves 1 ft in the morning. $$ ANZ534-290800- Chesapeake Bay from Drum Point to Smith Point- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW late. Gusts up to 20 kt. Waves 3 ft. .FRI...W winds 5 to 10 kt. Waves 1 to 2 ft. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft. .SAT...N winds 5 to 10 kt. Waves 1 to 2 ft. .SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .MON...E winds 5 to 10 kt. Waves 1 ft in the morning. $$ ANZ543-290800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 135 PM EDT Thu Aug 28 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 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 to 10 kt. Waves 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .MON...E winds 5 to 10 kt. Waves 1 ft in the morning. $$