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

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FZUS51 KLWX 231604
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1204 PM EDT Sat Aug 23 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.

ANZ500-240800-
1204 PM EDT Sat Aug 23 2025

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

Weak high pressure persists through tonight. A stronger cold front
approaches from the west Sunday before moving through early Monday.
High pressure will follow for much of next week. Small Craft
Advisories may be needed for portions of the waters Sunday evening
in southerly channeling, and again Monday night in northwest flow.

$$

ANZ535-240800-
Tidal Potomac from Key Bridge to Indian Head-
1204 PM EDT Sat Aug 23 2025

.THIS AFTERNOON...S winds 5 to 10 kt. Waves 1 ft.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 kt. Waves less than 1 ft.
.SUN NIGHT...S winds around 5 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.

$$

ANZ536-240800-
Tidal Potomac from Indian Head to Cobb Island-
1204 PM EDT Sat Aug 23 2025

.THIS AFTERNOON...SE winds 5 to 10 kt. Waves 1 ft.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 kt. Waves less than 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 kt. Waves less than 1 ft.
.TUE...NW winds 5 kt. Waves less than 1 ft.
.WED...NW winds around 5 kt. Waves 1 ft.

$$

ANZ537-240800-
Tidal Potomac from Cobb Island to Smith Point-
1204 PM EDT Sat Aug 23 2025

.THIS AFTERNOON...SE winds 10 to 15 kt. Waves 1 to 2 ft.
.TONIGHT...S winds 10 to 15 kt. Waves 1 to 2 ft.
.SUN...SE winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.

$$

ANZ530-240800-
Chesapeake Bay north of Pooles Island-
1204 PM EDT Sat Aug 23 2025

.THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft or less.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ531-240800-
Chesapeake Bay from Pooles Island to Sandy Point-
1204 PM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH
LATE TONIGHT...

.THIS AFTERNOON...S winds 10 to 15 kt. Waves 1 to 2 ft.
.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ538-240800-
Patapsco River including Baltimore Harbor-
1204 PM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH
LATE TONIGHT...

.THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...S winds 5 to 10 kt. Gusts up to 20 kt until early
morning. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft or less. A chance of
showers and tstms.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft or less.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ539-240800-
Chester River to Queenstown MD-
1204 PM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH
LATE TONIGHT...

.THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...S winds 10 kt. Gusts up to 20 kt until early morning.
Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.MON...NW winds 5 kt. Waves less than 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.

$$

ANZ532-240800-
Chesapeake Bay from Sandy Point to North Beach-
1204 PM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH
LATE TONIGHT...

.THIS AFTERNOON...S winds 10 to 15 kt. Waves 1 to 2 ft.
.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN...S winds 5 to 10 kt. Waves 1 to 2 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft. A chance of
showers.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.

$$

ANZ540-240800-
Eastern Bay-
1204 PM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH
LATE TONIGHT...

.THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...S winds 10 kt. Gusts up to 20 kt until early morning.
Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft or less.

$$

ANZ533-240800-
Chesapeake Bay from North Beach to Drum Point-
1204 PM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH
LATE TONIGHT...

.THIS AFTERNOON...S winds 10 to 15 kt. Waves 1 to 2 ft.
.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN...S winds 5 to 10 kt. Waves 1 to 2 ft.
.SUN NIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt after
midnight. Waves 1 to 2 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.

$$

ANZ541-240800-
Choptank River to Cambridge MD and the Little Choptank River-
1204 PM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH
LATE TONIGHT...

.THIS AFTERNOON...S winds 10 to 15 kt. Waves 1 ft.
.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.

$$

ANZ542-240800-
Patuxent River to Broomes Island MD-
1204 PM EDT Sat Aug 23 2025

.THIS AFTERNOON...SE winds 10 kt. Waves 1 ft.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 kt. Waves less than 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.

$$

ANZ534-240800-
Chesapeake Bay from Drum Point to Smith Point-
1204 PM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH
LATE TONIGHT...

.THIS AFTERNOON...SE winds 10 to 15 kt. Waves 1 to 2 ft.
.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN...SE winds 5 to 10 kt. Waves 1 to 2 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 to 2 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 to 2 ft.
.WED...NW winds 5 to 10 kt. Waves 1 to 2 ft.

$$

ANZ543-240800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1204 PM EDT Sat Aug 23 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH
LATE TONIGHT...

.THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN...SE winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.

$$