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FZUS51 KLWX 210257
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
957 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-
957 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-
957 PM EST Thu Nov 20 2025

.REST OF TONIGHT...SE winds around 5 kt. Waves 1 ft.
.FRI...S winds around 5 kt. Waves 1 ft. A chance of rain.
.FRI NIGHT...S 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.
.SUN NIGHT...W winds around 5 kt. Waves 1 ft.
.MON...NE winds around 5 kt. Waves 1 ft.
.TUE...S winds 5 to 10 kt. Waves 1 ft. A chance of rain through the
day, then rain likely in the evening. A chance of rain after
midnight.

$$

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

.REST OF TONIGHT...SE winds 5 kt. Waves less than 1 ft.
.FRI...S winds around 5 kt. Waves 1 ft. A chance of rain. Vsby 1 to
3 NM.
.FRI NIGHT...S winds around 5 kt...becoming NW late. 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.
.SUN NIGHT...W winds around 5 kt. Waves 1 ft.
.MON...E winds around 5 kt. Waves 1 ft.
.TUE...S winds 5 to 10 kt. Waves 1 ft. A chance of rain through the
day, then rain likely through the night.

$$

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

.REST OF TONIGHT...SE winds 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...NW winds around 5 kt. Waves 1 ft.
.SUN NIGHT...SW winds 5 kt. Waves less than 1 ft.
.MON...NE winds 5 kt...becoming SE after midnight. Waves 1 ft.
.TUE...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain in the
afternoon. Rain likely through the night.

$$

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

.REST OF 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 late. 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 around 5 kt. Waves 1 ft or less.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.MON...N winds around 5 kt. Waves 1 ft or less.
.TUE...S winds 5 to 10 kt. Waves 1 ft. A chance of rain through the
day, then rain likely in the evening. A chance of rain after
midnight.

$$

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

.REST OF TONIGHT...S winds 5 kt. Waves flat.
.FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain.
.FRI NIGHT...SW winds around 5 kt...becoming N late. 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.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds around 5 kt...becoming SE after midnight. Waves 1 ft
or less.
.TUE...S winds 5 to 10 kt. Waves 1 to 2 ft. A chance of rain through
the day, then rain likely in the evening. A chance of rain after
midnight.

$$

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

.REST OF TONIGHT...S 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.
.SUN NIGHT...W winds 5 kt. Waves flat.
.MON...SW winds around 5 kt. Waves flat.
.TUE...S winds 5 to 10 kt. Waves 1 ft. A chance of rain through the
day, then rain likely in the evening. A chance of rain after
midnight.

$$

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

.REST OF TONIGHT...SE winds 5 kt. Waves flat.
.FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain.
.FRI NIGHT...SW winds around 5 kt...becoming N late. 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.
.SUN NIGHT...W winds 5 kt. Waves less than 1 ft.
.MON...NE winds around 5 kt. Waves 1 ft or less.
.TUE...S winds 5 to 10 kt. Waves 1 ft. A chance of rain through the
day, then rain likely in the evening. A chance of rain after
midnight.

$$

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

.REST OF TONIGHT...S winds 5 kt. Waves flat.
.FRI...S winds 5 kt. Waves less than 1 ft. A chance of rain.
.FRI NIGHT...SW winds 5 kt...becoming N late. Waves 1 ft. Rain. Vsby
1 to 3 NM.
.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 kt. Waves less than 1 ft.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft.
.TUE...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain
through the day, then rain likely through the night.

$$

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

.REST OF TONIGHT...SE winds 5 kt. Waves flat.
.FRI...S winds 5 kt. Waves flat. A chance of rain.
.FRI NIGHT...S winds around 5 kt...becoming N late. 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 kt. Waves less than 1 ft.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.MON...N winds around 5 kt...becoming SE after midnight. Waves 1 ft
or less.
.TUE...S winds 5 to 10 kt. Waves 1 ft. A chance of rain through the
day, then rain likely through the night.

$$

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

.REST OF TONIGHT...SE winds 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 late. 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. Waves 1 ft.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft.
.TUE...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain
through the day, then rain likely through the night.

$$

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

.REST OF TONIGHT...SE winds 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 N late. Waves 1 ft or less.
Rain. Vsby 1 to 3 NM.
.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. Waves less than 1 ft.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 kt...becoming SE after midnight. Waves 1 ft.
.TUE...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain in the
afternoon. Rain likely through the night.

$$

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

.REST OF 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...NW winds 5 kt. Waves less than 1 ft.
.SUN NIGHT...W winds 5 kt. Waves less than 1 ft.
.MON...E winds 5 kt. Waves less than 1 ft.
.TUE...S winds 5 to 10 kt. Waves 1 ft. A chance of rain through the
day, then rain likely through the night.

$$

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

.REST OF TONIGHT...SE winds 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. Waves 1 ft.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt...becoming SE. Waves 1 ft.
.TUE...S winds 10 to 15 kt. Waves 1 to 2 ft...building to 3 ft. A
chance of rain in the afternoon. Rain likely through the night.

$$

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

.REST OF TONIGHT...SE winds 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. Waves 1 ft.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt...becoming SE. Waves 1 ft or less.
.TUE...S winds 15 to 20 kt. Waves 1 to 2 ft. A chance of rain in the
afternoon. Rain likely through the night.

$$