Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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791 FZUS51 KLWX 132305 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 705 PM EDT Sun Sep 13 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. ANZ500-140800- 705 PM EDT Sun Sep 13 2026 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A cold front approaching from the Ohio River Valley will cross the Mid-Atlantic by Monday morning. High pressure will return during the early to middle portions of the week. Another cold front may approach mid to late week. $$ ANZ535-140800- Tidal Potomac from Key Bridge to Indian Head- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY EVENING... .TONIGHT...SW winds 5 kt...becoming NW late. Waves 1 ft. Isolated showers this evening. .MON...N winds 10 kt with gusts to 20 kt. Waves 1 ft. .MON NIGHT...N winds 5 to 10 kt. Waves 1 ft. .TUE...E winds around 5 kt. Waves 1 ft. .TUE NIGHT...S winds around 5 kt. Waves 1 ft. .WED...S winds around 5 kt. Waves 1 ft. .WED NIGHT...S winds around 5 kt. Waves 1 ft. .THU...S winds around 5 kt. Waves 1 ft. .FRI...N winds 5 to 10 kt. Waves 1 ft. $$ ANZ536-140800- Tidal Potomac from Indian Head to Cobb Island- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY EVENING... .TONIGHT...SW winds 5 kt...becoming NW late. Waves 1 ft. Isolated showers this evening. .MON...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .MON NIGHT...N winds 5 to 10 kt. Waves 1 ft. .TUE...E winds around 5 kt. Waves 1 ft. .TUE NIGHT...S winds around 5 kt. Waves 1 ft. .WED...S winds around 5 kt. Waves 1 ft. .WED NIGHT...S winds around 5 kt. Waves 1 ft. .THU...S winds around 5 kt. Waves 1 ft. .FRI...NE winds around 5 kt. Waves 1 ft. $$ ANZ537-140800- Tidal Potomac from Cobb Island to Smith Point- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH TUESDAY MORNING... .TONIGHT...S winds 5 kt...becoming W after midnight. Waves 1 ft or less. Isolated showers this evening. .MON...N winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. .MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...E winds 5 to 10 kt. Waves 1 to 2 ft. .TUE NIGHT...SE winds around 5 kt. Waves 1 ft. .WED...SE winds around 5 kt. Waves flat. .WED NIGHT...S winds 5 kt. Waves less than 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft or less. .FRI...N winds 5 kt...becoming NE. Waves 1 ft. $$ ANZ530-140800- Chesapeake Bay north of Pooles Island- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY EVENING... .TONIGHT...SW winds 5 kt...becoming NW 15 kt with gusts to 20 kt late. Waves 1 ft. .MON...N winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft. .MON NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt until early morning. Waves 1 ft. .TUE...NE winds 5 to 10 kt...becoming SE in the afternoon. Waves 1 ft. .TUE NIGHT...SE winds 5 to 10 kt. Waves 1 ft. .WED...S winds around 5 kt. Waves 1 ft. .WED NIGHT...S winds around 5 kt. Waves 1 ft. .THU...SW winds 5 to 10 kt. Waves 1 ft. .FRI...N winds 5 to 10 kt. Waves 1 ft. $$ ANZ531-140800- Chesapeake Bay from Pooles Island to Sandy Point- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY EVENING... .TONIGHT...SW winds 5 kt...becoming W 10 to 15 kt with gusts to 25 kt after midnight. Waves 1 to 2 ft. .MON...N winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. .MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .TUE...NE winds 5 to 10 kt...becoming SE in the afternoon. Waves 1 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. .WED...S winds 5 kt. Waves less than 1 ft. .WED NIGHT...S winds 5 kt. Waves less than 1 ft. .THU...SW winds 5 to 10 kt. Waves 1 ft or less. .FRI...NE winds 5 to 10 kt. Waves 1 ft. $$ ANZ538-140800- Patapsco River including Baltimore Harbor- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY EVENING... .TONIGHT...SW winds 5 kt...becoming NW with gusts to 20 kt late. Waves 1 ft or less. Isolated showers this evening. .MON...N winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. .MON NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt until early morning. Waves 1 ft. .TUE...E winds 5 kt. Waves less than 1 ft. .TUE NIGHT...S winds around 5 kt. Waves 1 ft. .WED...S winds 5 kt. Waves less than 1 ft. .WED NIGHT...S winds around 5 kt. Waves flat. .THU...SW winds 5 to 10 kt. Waves 1 ft or less. .FRI...NE winds 5 to 10 kt. Waves 1 ft or less. $$ ANZ539-140800- Chester River to Queenstown MD- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY EVENING... .TONIGHT...SW winds 5 kt...becoming NW 15 kt with gusts to 20 kt late. Waves 1 ft or less...building to 2 ft late. .MON...N winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft. .MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TUE...NE winds 5 to 10 kt...becoming S in the afternoon. Waves 1 ft or less. .TUE NIGHT...SE winds 5 to 10 kt. Waves 1 ft. .WED...S winds around 5 kt. Waves flat. .WED NIGHT...S winds around 5 kt. Waves 1 ft or less. .THU...S winds around 5 kt. Waves 1 ft or less. .FRI...NE winds 5 to 10 kt. Waves 1 ft. $$ ANZ532-140800- Chesapeake Bay from Sandy Point to North Beach- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY EVENING... .TONIGHT...SW winds 5 kt...becoming W 10 to 15 kt with gusts to 25 kt after midnight. Waves 1 ft. .MON...N winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. .MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 ft. .WED...S winds 5 kt. Waves less than 1 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. .FRI...NE winds 5 to 10 kt. Waves 1 ft. $$ ANZ540-140800- Eastern Bay- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY EVENING... .TONIGHT...SW winds 5 kt...becoming NW 15 kt with gusts to 20 kt late. Waves 1 ft or less. .MON...N winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft. .MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TUE...NE winds 5 to 10 kt...becoming S in the afternoon. Waves 1 ft or less. .TUE NIGHT...SE winds 5 to 10 kt. Waves 1 ft. .WED...S winds around 5 kt. Waves flat. .WED NIGHT...S winds around 5 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft or less. .FRI...NE winds 5 to 10 kt. Waves 1 ft. $$ ANZ533-140800- Chesapeake Bay from North Beach to Drum Point- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY EVENING... .TONIGHT...S winds 5 kt...becoming W 10 to 15 kt with gusts to 20 kt after midnight. Waves 1 to 2 ft. Isolated showers this evening. .MON...N winds 15 to 20 kt with gusts to 30 kt. Waves 4 ft. .MON NIGHT...NE winds 10 to 15 kt. Gusts up to 25 kt until early morning. Waves 2 to 3 ft. .TUE...E winds 5 to 10 kt. Waves 1 to 2 ft. .TUE NIGHT...SE winds 5 to 10 kt. Waves 1 ft. .WED...S winds around 5 kt. Waves flat. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. .FRI...N winds 5 to 10 kt...becoming NE. Waves 1 ft. $$ ANZ541-140800- Choptank River to Cambridge MD and the Little Choptank River- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY EVENING... .TONIGHT...SW winds 5 kt...becoming W 10 to 15 kt with gusts to 20 kt after midnight. Waves 1 to 2 ft. Isolated showers this evening. .MON...N winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. .MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft or less. .TUE NIGHT...SE winds 5 to 10 kt. Waves 1 ft. .WED...S winds around 5 kt. Waves flat. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft or less. .FRI...N winds 5 to 10 kt...becoming NE. Waves 1 ft. $$ ANZ542-140800- Patuxent River to Broomes Island MD- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH MONDAY EVENING... .TONIGHT...SW winds 5 kt...becoming NW late. Waves 1 ft. Isolated showers this evening. .MON...N winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. .MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .TUE...E winds 5 kt. Waves less than 1 ft. .TUE NIGHT...SE winds around 5 kt. Waves 1 ft. .WED...S winds around 5 kt. Waves 1 ft. .WED NIGHT...S winds around 5 kt. Waves 1 ft. .THU...S winds around 5 kt. Waves 1 ft. .FRI...NE winds 5 kt. Waves less than 1 ft. $$ ANZ534-140800- Chesapeake Bay from Drum Point to Smith Point- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH TUESDAY MORNING... .TONIGHT...S winds 5 to 10 kt...becoming W 10 to 15 kt with gusts to 20 kt after midnight. Waves 1 to 2 ft. Isolated showers this evening. .MON...N winds 15 to 20 kt with gusts to 30 kt. Waves 4 ft. .MON NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. .TUE...NE winds 10 to 15 kt...becoming E around 5 kt in the afternoon. Waves 1 to 2 ft. .TUE NIGHT...SE winds 5 to 10 kt. Waves 1 ft. .WED...SE winds around 5 kt. Waves 1 ft or less. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft or less. .FRI...W winds 5 to 10 kt...becoming NE. Waves 1 ft. $$ ANZ543-140800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 705 PM EDT Sun Sep 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM EDT MONDAY THROUGH TUESDAY MORNING... .TONIGHT...SW winds 5 kt...becoming W after midnight. Waves 1 ft. .MON...N winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .MON NIGHT...N winds 10 to 15 kt. Gusts up to 25 kt until early morning. Waves 1 to 2 ft. .TUE...E winds 5 to 10 kt. Waves 1 ft. .TUE NIGHT...SE winds 5 to 10 kt. Waves 1 ft. .WED...SE winds around 5 kt. Waves flat. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. .THU...S winds 5 to 10 kt. Waves 1 ft or less. .FRI...NW winds 5 to 10 kt...becoming NE. Waves 1 ft. $$