674
FZUS51 KLWX 201457
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
957 AM EST Thu Nov 20 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.

ANZ500-202100-
957 AM EST Thu Nov 20 2025

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

A front will remain stalled just to the south through tonight.  An
area of low pressure approaching from the Midwest will track  along
this stalled front Friday into Saturday. High pressure will  return
Sunday into Monday. Small Craft Advisories may be needed  Friday
night into Saturday.

$$

ANZ535-202100-
Tidal Potomac from Key Bridge to Indian Head-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...SE winds around 5 kt. Waves 1 ft or less.
.TONIGHT...SE winds around 5 kt. Waves flat.
.FRI...S winds around 5 kt. Waves 1 ft. A chance of rain.
.FRI NIGHT...SW winds around 5 kt. Waves 1 ft. Rain.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.SAT NIGHT...N winds around 5 kt. Waves 1 ft.
.SUN...W winds around 5 kt. Waves 1 ft.
.MON...NE winds around 5 kt. Waves 1 ft.

$$

ANZ536-202100-
Tidal Potomac from Indian Head to Cobb Island-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...Light winds. Waves 1 ft or less.
.TONIGHT...SE winds around 5 kt. Waves 1 ft.
.FRI...S winds around 5 kt. Waves 1 ft. A chance of rain. Vsby 1 to
3 NM.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.SAT NIGHT...N winds around 5 kt. Waves 1 ft.
.SUN...W winds around 5 kt. Waves 1 ft.
.MON...NE winds around 5 kt. Waves 1 ft.

$$

ANZ537-202100-
Tidal Potomac from Cobb Island to Smith Point-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...NE winds 5 kt. Waves flat.
.TONIGHT...SE winds around 5 kt. Waves flat.
.FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain.
.SAT...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.SUN...W winds around 5 kt...increasing to 5 to 10 kt after
midnight. Waves 1 ft or less.
.MON...NW winds 5 kt...becoming SE after midnight. Waves 1 ft.

$$

ANZ530-202100-
Chesapeake Bay north of Pooles Island-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...E winds around 5 kt. Waves flat.
.TONIGHT...SE winds around 5 kt. Waves flat.
.FRI...S winds around 5 kt. Waves flat. A chance of rain.
.FRI NIGHT...SW winds around 5 kt...becoming NW after midnight.
Waves 1 ft or less. Rain.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft or less.
.SUN...W winds 5 to 10 kt. Waves 1 ft or less.
.MON...NW winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft
or less.

$$

ANZ531-202100-
Chesapeake Bay from Pooles Island to Sandy Point-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...NE winds around 5 kt. Waves flat.
.TONIGHT...SE winds around 5 kt. Waves flat.
.FRI...S winds around 5 kt. Waves 1 ft or less. A chance of rain.
.FRI NIGHT...S winds 5 kt...becoming NW after midnight. Waves 1 ft.
Rain.
.SAT...N winds 10 kt. Waves 1 ft. A chance of rain.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.SUN...W winds 5 kt...becoming SW. Waves 1 ft or less.
.MON...W winds 5 to 10 kt...becoming SE. Waves 1 ft.

$$

ANZ538-202100-
Patapsco River including Baltimore Harbor-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...E winds around 5 kt. Waves flat.
.TONIGHT...Light winds. Waves flat.
.FRI...S winds around 5 kt. Waves flat. A chance of rain.
.FRI NIGHT...W winds around 5 kt. Waves flat. Rain.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft or less.
.SUN...W winds around 5 kt. Waves flat.
.MON...W winds around 5 kt. Waves 1 ft or less.

$$

ANZ539-202100-
Chester River to Queenstown MD-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...NE winds around 5 kt. Waves flat.
.TONIGHT...SE winds around 5 kt. Waves flat.
.FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. Rain.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.SUN...W winds 5 to 10 kt. Waves 1 ft or less.
.MON...SW winds 5 kt. Waves less than 1 ft.

$$

ANZ532-202100-
Chesapeake Bay from Sandy Point to North Beach-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...NE winds around 5 kt. Waves flat.
.TONIGHT...SE winds around 5 kt. Waves flat.
.FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain.
.SAT...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.SUN...W winds 5 kt...becoming SW. Waves 1 ft or less.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft.

$$

ANZ540-202100-
Eastern Bay-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...NE winds around 5 kt. Waves flat.
.TONIGHT...SE winds around 5 kt. Waves flat.
.FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. Rain.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.SUN...W winds 5 to 10 kt. Waves 1 ft or less.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft or less.

$$

ANZ533-202100-
Chesapeake Bay from North Beach to Drum Point-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...NE winds around 5 kt. Waves flat.
.TONIGHT...SE winds around 5 kt. Waves flat.
.FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain.
.SAT...N winds 10 to 15 kt. Waves 2 ft. A chance of rain.
.SAT NIGHT...N winds 10 to 15 kt. Waves 1 to 2 ft.
.SUN...NW winds 5 kt...becoming SW. Waves 1 ft or less.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft.

$$

ANZ541-202100-
Choptank River to Cambridge MD and the Little Choptank River-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...NE winds around 5 kt. Waves flat.
.TONIGHT...SE winds around 5 kt. Waves flat.
.FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain.
.SAT...N winds 10 to 15 kt. Waves 1 ft. A chance of rain.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.SUN...NW winds 5 kt...becoming SW. Waves 1 ft or less.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft.

$$

ANZ542-202100-
Patuxent River to Broomes Island MD-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...NE winds around 5 kt. Waves 1 ft or less.
.TONIGHT...SE winds around 5 kt. Waves 1 ft or less.
.FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.SUN...W winds 5 kt. Waves less than 1 ft.
.MON...SW winds 5 kt. Waves less than 1 ft.

$$

ANZ534-202100-
Chesapeake Bay from Drum Point to Smith Point-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...E winds around 5 kt. Waves flat.
.FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain.
.SAT...N winds 10 to 15 kt. Waves 2 ft. A chance of rain.
.SAT NIGHT...N winds 10 to 15 kt. Waves 2 ft.
.SUN...N winds 5 to 10 kt...becoming SW. Waves 1 ft.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft.

$$

ANZ543-202100-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
957 AM EST Thu Nov 20 2025

.REST OF TODAY...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...E winds around 5 kt. Waves flat.
.FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain.
.SAT...NW winds 10 to 15 kt. Waves 1 ft. A chance of rain.
.SAT NIGHT...N winds 10 to 15 kt. Waves 1 ft.
.SUN...N winds 5 to 10 kt...becoming W. Waves 1 ft.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft.

$$