National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Coastal Waters Forecast
Issued by NWS Sterling, VA

Home |  Current Version |  Previous Version |  Text Only |  Print | Product List |  Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 
307
FZUS51 KLWX 040834
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
434 AM EDT Mon Aug 4 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.

ANZ500-042300-
434 AM EDT Mon Aug 4 2025

.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...

High pressure will remain anchored to the north through mid  week.
Meanwhile, an area of low pressure could form off the  Southeastern
U.S. during the middle or second half of the week and  drift west or
northwest toward the coast. Small Craft Advisory  conditions are
possible beginning Wednesday night and continuing  through the end
of the week.

$$

ANZ535-042300-
Tidal Potomac from Key Bridge to Indian Head-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...Light winds. Waves flat.
.TODAY...NE winds around 5 kt. Waves 1 ft.
.TONIGHT...SE winds around 5 kt. Waves 1 ft or less.
.TUE...E winds around 5 kt. Waves 1 ft or less.
.TUE NIGHT...E winds around 5 kt. Waves 1 ft.
.WED...E winds around 5 kt. Waves 1 ft.
.WED NIGHT...E winds 5 kt. Waves less than 1 ft. A chance of
showers.
.THU...E winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds around 5 kt. Waves 1 ft.

$$

ANZ536-042300-
Tidal Potomac from Indian Head to Cobb Island-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...N winds 5 kt. Waves flat.
.TODAY...NE winds around 5 kt. Waves 1 ft.
.TONIGHT...S winds around 5 kt. Waves 1 ft or less.
.TUE...NE winds around 5 kt. Waves 1 ft or less.
.TUE NIGHT...E winds around 5 kt. Waves 1 ft.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI...E winds 5 to 10 kt. Waves 1 ft.

$$

ANZ537-042300-
Tidal Potomac from Cobb Island to Smith Point-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...NE winds 5 kt. Waves less than 1 ft.
.TODAY...NE winds 5 to 10 kt. Waves 1 ft.
.TONIGHT...E winds around 5 kt. Waves 1 ft.
.TUE...E winds around 5 kt. Waves 1 ft.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves 2 ft.
.THU...E winds 10 to 15 kt. Waves 2 ft. A chance of showers.
.FRI...E winds 5 to 10 kt. Waves 2 ft.

$$

ANZ530-042300-
Chesapeake Bay north of Pooles Island-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...N winds 5 kt. Waves flat.
.TODAY...NE winds around 5 kt. Waves flat.
.TONIGHT...SW winds around 5 kt. Waves flat.
.TUE...E winds around 5 kt. Waves flat.
.TUE NIGHT...E winds 5 kt. Waves flat.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.THU...E winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft.

$$

ANZ531-042300-
Chesapeake Bay from Pooles Island to Sandy Point-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...N winds 5 kt. Waves flat.
.TODAY...NE winds around 5 kt. Waves flat.
.TONIGHT...S winds around 5 kt. Waves flat.
.TUE...E winds around 5 kt. Waves 1 ft or less.
.TUE NIGHT...E winds 5 kt. Waves less than 1 ft.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.THU...E winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft.

$$

ANZ538-042300-
Patapsco River including Baltimore Harbor-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...Light winds. Waves flat.
.TODAY...NE winds around 5 kt. Waves flat.
.TONIGHT...SW winds around 5 kt. Waves flat.
.TUE...NE winds around 5 kt. Waves 1 ft or less.
.TUE NIGHT...E winds around 5 kt. Waves 1 ft or less.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.THU...E winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft.

$$

ANZ539-042300-
Chester River to Queenstown MD-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...Light winds. Waves flat.
.TODAY...N winds around 5 kt. Waves flat.
.TONIGHT...S winds around 5 kt. Waves flat.
.TUE...E winds around 5 kt. Waves flat.
.TUE NIGHT...E winds 5 kt. Waves flat.
.WED...E winds 5 kt. Waves less than 1 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.THU...E winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft.

$$

ANZ532-042300-
Chesapeake Bay from Sandy Point to North Beach-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...N winds 5 kt. Waves flat.
.TODAY...N winds around 5 kt. Waves flat.
.TONIGHT...S winds around 5 kt. Waves flat.
.TUE...NE winds 5 kt. Waves flat.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.THU...E winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft.

$$

ANZ540-042300-
Eastern Bay-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...NE winds 5 kt. Waves flat.
.TODAY...NE winds around 5 kt. Waves flat.
.TONIGHT...S winds around 5 kt. Waves flat.
.TUE...E winds around 5 kt. Waves flat.
.TUE NIGHT...E winds 5 kt. Waves flat.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.THU...E winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft.

$$

ANZ533-042300-
Chesapeake Bay from North Beach to Drum Point-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...NE winds 5 kt. Waves flat.
.TODAY...NE winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds around 5 kt. Waves 1 ft or less.
.TUE...NE winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...E winds 10 kt. Waves 1 to 2 ft.
.THU...E winds 10 kt. Waves 1 to 2 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft.

$$

ANZ541-042300-
Choptank River to Cambridge MD and the Little Choptank River-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...NE winds 5 kt. Waves flat.
.TODAY...NE winds 5 kt. Waves flat.
.TONIGHT...SE winds around 5 kt. Waves flat.
.TUE...E winds 5 kt. Waves flat.
.TUE NIGHT...E winds 5 kt. Waves less than 1 ft.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.THU...E winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft.

$$

ANZ542-042300-
Patuxent River to Broomes Island MD-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...N winds 5 kt. Waves less than 1 ft.
.TODAY...NE winds around 5 kt. Waves 1 ft.
.TONIGHT...SE winds around 5 kt. Waves 1 ft.
.TUE...NE winds around 5 kt. Waves 1 ft.
.TUE NIGHT...E winds 5 kt. Waves less than 1 ft.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.THU...E winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft.

$$

ANZ534-042300-
Chesapeake Bay from Drum Point to Smith Point-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...NE winds 10 kt. Waves 1 ft.
.TODAY...NE winds 5 to 10 kt. Waves 1 ft.
.TONIGHT...E winds 5 to 10 kt. Waves 1 ft.
.TUE...E winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...E winds 10 kt. Waves 1 ft.
.WED NIGHT...E winds 10 to 15 kt. Waves 2 ft. A chance of showers.
.THU...E winds 10 to 15 kt. Waves 2 ft. A chance of showers in the
morning.
.FRI...E winds 10 to 15 kt. Waves 2 ft.

$$

ANZ543-042300-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
434 AM EDT Mon Aug 4 2025

.REST OF THE OVERNIGHT...NE winds 10 kt. Waves 1 ft.
.TODAY...NE winds 5 to 10 kt. Waves 1 ft.
.TONIGHT...E winds 5 to 10 kt. Waves 1 ft or less.
.TUE...E winds 5 to 10 kt. Waves 1 ft or less.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...E winds 10 to 15 kt. Waves 1 ft.
.THU...E winds 10 to 15 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft.

$$