329
FZUS51 KLWX 202057
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
357 PM 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.

ANZ500-210900-
357 PM EST Thu Nov 20 2025

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

A warm front will lift toward the waters late tonight into Friday.
An  area of low pressure approaching from the Midwest will track
along  this front as it stalls nearby late Friday into Saturday.
High  pressure will return Sunday into Monday. Small Craft
Advisories may  be needed Friday night into Saturday.

$$

ANZ535-210900-
Tidal Potomac from Key Bridge to Indian Head-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...Light winds. Waves 1 ft.
.TONIGHT...SE winds around 5 kt. Waves 1 ft.
.FRI...S winds around 5 kt. Waves 1 ft. A chance of rain.
.FRI NIGHT...W 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.

$$

ANZ536-210900-
Tidal Potomac from Indian Head to Cobb Island-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...SE winds 5 kt. Waves less than 1 ft.
.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 5 to 10 kt. Waves 1 ft.
.SUN...W winds around 5 kt. Waves 1 ft.
.MON...E winds around 5 kt. Waves 1 ft.

$$

ANZ537-210900-
Tidal Potomac from Cobb Island to Smith Point-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...E 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. Waves 1 ft or less.
.MON...NE winds 5 kt...becoming SE after midnight. Waves 1 ft.

$$

ANZ530-210900-
Chesapeake Bay north of Pooles Island-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...Light winds. Waves flat.
.TONIGHT...SE winds around 5 kt. Waves flat.
.FRI...SW winds around 5 kt. Waves flat. A chance of rain.
.FRI NIGHT...SW winds around 5 kt...becoming N after midnight. 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.
.SUN...W winds 5 to 10 kt. Waves 1 ft or less.
.MON...N winds around 5 kt. Waves 1 ft or less.

$$

ANZ531-210900-
Chesapeake Bay from Pooles Island to Sandy Point-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...Light winds. 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...S winds 5 kt...becoming NW after midnight. Waves 1 ft
or less. 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 to 10 kt. Waves 1 ft.
.MON...NW winds around 5 kt...becoming SE after midnight. Waves 1 ft
or less.

$$

ANZ538-210900-
Patapsco River including Baltimore Harbor-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...E winds 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...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 1 ft or less.
.MON...SW winds around 5 kt. Waves flat.

$$

ANZ539-210900-
Chester River to Queenstown MD-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...Light winds. 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...S winds 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.
.SUN...W winds 5 kt. Waves less than 1 ft.
.MON...NE winds around 5 kt. Waves 1 ft or less.

$$

ANZ532-210900-
Chesapeake Bay from Sandy Point to North Beach-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...E 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 2 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.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft.

$$

ANZ540-210900-
Eastern Bay-
357 PM EST Thu Nov 20 2025

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

$$

ANZ533-210900-
Chesapeake Bay from North Beach to Drum Point-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...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 2 ft. A chance of rain.
.SAT NIGHT...N winds 10 to 15 kt. Waves 1 to 2 ft.
.SUN...NW winds 5 to 10 kt...becoming W. Waves 1 ft.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft.

$$

ANZ541-210900-
Choptank River to Cambridge MD and the Little Choptank River-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...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 or less. 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 W. Waves 1 ft.
.MON...N winds 5 kt...becoming SE after midnight. Waves 1 ft.

$$

ANZ542-210900-
Patuxent River to Broomes Island MD-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...E winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds around 5 kt. Waves 1 ft.
.FRI...S winds 5 kt. Waves less than 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 5 to 10 kt. Waves 1 ft.
.SUN...W winds 5 kt. Waves less than 1 ft.
.MON...E winds 5 kt. Waves less than 1 ft.

$$

ANZ534-210900-
Chesapeake Bay from Drum Point to Smith Point-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...NE winds 5 kt. Waves flat.
.TONIGHT...SE 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 with gusts to 20 kt. Waves 2 ft. Rain
likely.
.SAT NIGHT...N winds 10 to 15 kt. Waves 2 ft.
.SUN...NW winds 5 to 10 kt...becoming W. Waves 1 ft.
.MON...N winds 5 to 10 kt...becoming SE. Waves 1 ft.

$$

ANZ543-210900-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
357 PM EST Thu Nov 20 2025

.REST OF THIS AFTERNOON...N winds 5 kt. Waves flat.
.TONIGHT...SE 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 with gusts to 20 kt. Waves 1 to 2 ft. A
chance of rain.
.SAT NIGHT...N winds 10 to 15 kt. Waves 1 ft.
.SUN...NW winds 5 to 10 kt...becoming W. Waves 1 ft.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft or less.

$$