312
FZUS51 KLWX 050258
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
957 PM EST Thu Dec 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.

ANZ500-050900-
957 PM EST Thu Dec 4 2025

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

A reinforcing cold front will cross the Mid-Atlantic this evening.
Low pressure will likely track offshore of the Carolinas into the
Atlantic Ocean Friday into Saturday, but there is considerable
uncertainty as to how far north the low and its associated
precipitation gets. High pressure briefly builds over the area this
weekend. A couple of clipper-like systems may affect the area
heading into early to mid next week. Small Craft Advisories will
likely be needed on Monday.

$$

ANZ535-050900-
Tidal Potomac from Key Bridge to Indian Head-
957 PM EST Thu Dec 4 2025

.REST OF TONIGHT...NE winds 5 to 10 kt. Waves 1 ft. Snow likely with
vsby 1 to 3 NM.
.FRI...E winds around 5 kt. Waves 1 ft. Snow. Vsby 1 to 3 NM.
.FRI NIGHT...Light winds. Waves flat. Patchy fog. Vsby 1 to 3 NM.
.SAT...SW winds around 5 kt. Waves 1 ft or less.
.SAT NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.SUN...E winds around 5 kt. Waves 1 ft.
.SUN NIGHT...SW winds around 5 kt...becoming NW after midnight.
Waves 1 ft.
.MON...N winds 10 to 15 kt...diminishing to around 5 kt after
midnight. Waves 1 ft.
.TUE...S winds 5 to 10 kt. Waves 1 ft.

$$

ANZ536-050900-
Tidal Potomac from Indian Head to Cobb Island-
957 PM EST Thu Dec 4 2025

.REST OF TONIGHT...NE winds 10 kt. Waves 1 ft. Snow with vsby 1 to
3 NM.
.FRI...NE winds around 5 kt. Waves 1 ft. Snow. Vsby 1 to 3 NM.
.FRI NIGHT...NW winds around 5 kt. Waves 1 ft or less. Patchy fog.
Vsby 1 to 3 NM.
.SAT...SW winds around 5 kt. Waves 1 ft or less.
.SAT NIGHT...NW winds around 5 kt. Waves 1 ft.
.SUN...E winds around 5 kt. Waves 1 ft.
.SUN NIGHT...SW winds around 5 kt...becoming NW 10 to 15 kt after
midnight. Waves 1 ft.
.MON...N winds 10 to 15 kt...diminishing to around 5 kt after
midnight. Waves 1 ft.
.TUE...SW winds 5 to 10 kt. Waves 1 ft.

$$

ANZ537-050900-
Tidal Potomac from Cobb Island to Smith Point-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EST FRIDAY...

.REST OF TONIGHT...NE winds 10 to 15 kt. Waves 2 ft. Snow with vsby
1 to 3 NM.
.FRI...NE winds 5 to 10 kt. Waves 1 ft. Snow with a chance of rain.
Vsby 1 to 3 NM.
.FRI NIGHT...N winds 5 kt. Waves less than 1 ft. Patchy fog. Vsby
1 to 3 NM.
.SAT...W winds around 5 kt. Waves 1 ft or less.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.SUN...NE winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...SW winds 5 to 10 kt...becoming NW 15 to 20 kt after
midnight. Waves flat...building to 2 ft after midnight.
.MON...N winds 15 to 20 kt...diminishing to 5 to 10 kt after
midnight. Waves 2 to 3 ft.
.TUE...SW winds 10 to 15 kt. Waves 1 to 2 ft.

$$

ANZ530-050900-
Chesapeake Bay north of Pooles Island-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EST TONIGHT...

.REST OF TONIGHT...N winds 10 kt. Waves 1 ft. A slight chance of
snow with vsby 1 to 3 NM.
.FRI...E winds around 5 kt. Waves 1 ft. A chance of snow. Vsby 1 to
3 NM.
.FRI NIGHT...N winds around 5 kt. Waves flat. Patchy fog. Vsby 1 to
3 NM.
.SAT...W winds around 5 kt. Waves 1 ft.
.SAT NIGHT...NW winds around 5 kt. Waves 1 ft.
.SUN...NW winds around 5 kt. Waves 1 ft.
.SUN NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.MON...N winds 15 to 20 kt...diminishing to 5 to 10 kt. Waves 1 to
2 ft.
.TUE...S winds 10 to 15 kt...becoming SW 5 to 10 kt after midnight.
Waves 1 ft.

$$

ANZ531-050900-
Chesapeake Bay from Pooles Island to Sandy Point-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EST TONIGHT...

.REST OF TONIGHT...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of
snow with vsby 1 to 3 NM.
.FRI...E winds 5 to 10 kt. Waves 1 ft. Snow likely. Vsby 1 to 3 NM.
.FRI NIGHT...N winds around 5 kt. Waves flat. Patchy fog. Vsby 1 to
3 NM.
.SAT...W winds 5 kt. Waves flat.
.SAT NIGHT...NW winds 5 kt. Waves less than 1 ft.
.SUN...NW winds 5 kt. Waves less than 1 ft.
.SUN NIGHT...SW winds 5 to 10 kt...becoming NW 15 to 20 kt after
midnight. Waves 1 to 2 ft.
.MON...N winds 15 to 20 kt...becoming NE 5 to 10 kt after midnight.
Waves 2 to 3 ft...subsiding to 1 ft after midnight.
.TUE...S winds 10 to 15 kt...becoming SW. Waves 1 to 2 ft.

$$

ANZ538-050900-
Patapsco River including Baltimore Harbor-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EST TONIGHT...

.REST OF TONIGHT...N winds 5 to 10 kt. Waves 1 ft or less. A chance
of snow with vsby 1 to 3 NM.
.FRI...E winds 5 kt. Waves flat. Snow likely. Vsby 1 to 3 NM.
.FRI NIGHT...N winds around 5 kt. Waves flat. Patchy fog. Vsby 1 to
3 NM.
.SAT...SW winds around 5 kt. Waves flat.
.SAT NIGHT...NW winds around 5 kt. Waves flat.
.SUN...NE winds 5 kt. Waves flat.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft or less.
.MON...N winds 10 to 15 kt...becoming NE around 5 kt after midnight.
Waves 1 ft or less.
.TUE...SW winds 5 to 10 kt. Waves 1 ft.

$$

ANZ539-050900-
Chester River to Queenstown MD-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EST TONIGHT...

.REST OF TONIGHT...NE winds 10 to 15 kt. Waves 1 to 2 ft. A chance
of snow with vsby 1 to 3 NM.
.FRI...E winds 5 kt. Waves less than 1 ft. Snow likely. Vsby 1 to
3 NM.
.FRI NIGHT...N winds around 5 kt. Waves flat. A chance of snow and
rain. Patchy fog. Vsby 1 to 3 NM.
.SAT...W winds around 5 kt. Waves flat.
.SAT NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.SUN...NW winds 5 kt. Waves less than 1 ft.
.SUN NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.MON...N winds 15 to 20 kt...diminishing to 5 to 10 kt. Waves 1 to
2 ft.
.TUE...S winds 10 to 15 kt...becoming SW 5 to 10 kt after midnight.
Waves 1 to 2 ft.

$$

ANZ532-050900-
Chesapeake Bay from Sandy Point to North Beach-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EST TONIGHT...

.REST OF TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves
1 to 2 ft. Snow likely with vsby 1 to 3 NM.
.FRI...E winds 5 to 10 kt. Waves 1 ft. Snow. Vsby 1 to 3 NM.
.FRI NIGHT...N winds 5 kt. Waves less than 1 ft. A chance of rain
and snow. Patchy fog. Vsby 1 to 3 NM.
.SAT...W winds 5 kt. Waves flat.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.SUN...N winds 5 to 10 kt...becoming E in the afternoon. Waves 1 ft.
.SUN NIGHT...SW winds 5 to 10 kt...becoming NW 15 to 20 kt after
midnight. Waves 1 to 2 ft.
.MON...N winds 20 to 25 kt...becoming NE 5 to 10 kt after midnight.
Waves 2 to 3 ft...subsiding to 1 ft after midnight.
.TUE...S winds 15 to 20 kt...becoming SW 10 to 15 kt after midnight.
Waves 1 to 2 ft...building to 2 to 3 ft.

$$

ANZ540-050900-
Eastern Bay-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EST TONIGHT...

.REST OF TONIGHT...NE winds 10 to 15 kt. Waves 1 ft. Snow likely
with vsby 1 to 3 NM.
.FRI...E winds 5 to 10 kt. Waves 1 ft or less. Snow. Vsby 1 to 3 NM.
.FRI NIGHT...N winds around 5 kt. Waves flat. A chance of rain and
snow. Patchy fog. Vsby 1 to 3 NM.
.SAT...W winds around 5 kt. Waves flat.
.SAT NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.SUN...NW winds around 5 kt. Waves 1 ft or less.
.SUN NIGHT...SW winds 5 to 10 kt...becoming NW 15 to 20 kt after
midnight. Waves 1 ft.
.MON...N winds 15 to 20 kt...becoming NE 5 to 10 kt after midnight.
Waves 1 to 2 ft.
.TUE...S winds 10 to 15 kt...becoming SW. Waves 1 to 2 ft.

$$

ANZ533-050900-
Chesapeake Bay from North Beach to Drum Point-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EST FRIDAY...

.REST OF TONIGHT...NE winds 15 kt with gusts to 20 kt. Waves 2 to
3 ft. Snow likely with vsby 1 to 3 NM.
.FRI...NE winds 5 to 10 kt. Waves 1 ft. Snow. Vsby 1 to 3 NM.
.FRI NIGHT...N winds 5 kt. Waves less than 1 ft. A chance of rain
and snow. Patchy fog. Vsby 1 to 3 NM.
.SAT...W winds 5 kt. Waves flat.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.SUN...NE winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...SW winds 5 to 10 kt...becoming NW 15 to 20 kt with
gusts to 25 kt after midnight. Waves 1 ft... building to 3 ft after
midnight.
.MON...N winds 20 to 25 kt...becoming NE 5 to 10 kt after midnight.
Waves 3 ft...subsiding to 2 ft after midnight.
.TUE...S winds 5 to 10 kt...becoming SW 15 to 20 kt. Waves 1 to
2 ft.

$$

ANZ541-050900-
Choptank River to Cambridge MD and the Little Choptank River-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EST TONIGHT...

.REST OF TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves
1 to 2 ft. Snow likely with vsby 1 to 3 NM.
.FRI...NE winds 5 to 10 kt. Waves 1 ft. Snow. Vsby 1 to 3 NM.
.FRI NIGHT...N winds 5 kt. Waves less than 1 ft. A chance of rain
and snow. Patchy fog. Vsby 1 to 3 NM.
.SAT...W winds around 5 kt. Waves flat.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.SUN...NW winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...SW winds 5 to 10 kt...becoming NW 15 to 20 kt after
midnight. Waves 1 to 2 ft.
.MON...N winds 20 to 25 kt...becoming NE 5 to 10 kt after midnight.
Waves 2 to 3 ft...subsiding to 1 ft after midnight.
.TUE...S winds 10 to 15 kt...becoming SW 15 to 20 kt. Waves 1 to
2 ft.

$$

ANZ542-050900-
Patuxent River to Broomes Island MD-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EST TONIGHT...

.REST OF TONIGHT...NE winds 10 kt. Waves 1 ft. Snow likely with vsby
1 to 3 NM.
.FRI...NE winds 5 kt. Waves less than 1 ft. Snow. Vsby 1 to 3 NM.
.FRI NIGHT...N winds around 5 kt. Waves 1 ft. A chance of rain and
snow. Patchy fog. Vsby 1 to 3 NM.
.SAT...W winds around 5 kt. Waves 1 ft.
.SAT NIGHT...NW winds around 5 kt. Waves 1 ft.
.SUN...NE winds 5 kt. Waves less than 1 ft.
.SUN NIGHT...SW winds 5 kt...becoming NW 10 to 15 kt with gusts to
20 kt after midnight. Waves 1 ft.
.MON...N winds 15 to 20 kt...diminishing to 5 to 10 kt after
midnight. Waves 1 ft.
.TUE...SW winds 10 to 15 kt. Waves 1 ft.

$$

ANZ534-050900-
Chesapeake Bay from Drum Point to Smith Point-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EST FRIDAY...

.REST OF TONIGHT...NE winds 15 to 20 kt. Waves 2 to 3 ft. Snow
likely with vsby 1 to 3 NM.
.FRI...NE winds 5 to 10 kt. Waves 1 to 2 ft. Snow with rain likely.
Vsby 1 to 3 NM.
.FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain and
snow. Patchy fog. Vsby 1 to 3 NM.
.SAT...W winds 5 kt. Waves less than 1 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.SUN...NE winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...SW winds 5 to 10 kt...becoming NW 20 to 25 kt after
midnight. Waves 1 ft...building to 3 ft after midnight.
.MON...N winds 20 to 25 kt...becoming NE 10 to 15 kt after midnight.
Waves 4 ft...subsiding to 2 ft after midnight.
.TUE...W winds 10 to 15 kt...becoming SW 15 to 20 kt. Waves 1 to
2 ft...building to 3 ft.

$$

ANZ543-050900-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
957 PM EST Thu Dec 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EST FRIDAY...

.REST OF TONIGHT...NE winds 15 kt with gusts to 20 kt. Waves 1 to
2 ft. Snow likely with vsby 1 to 3 NM.
.FRI...NE winds 5 to 10 kt. Waves 1 ft. Snow with rain likely. Vsby
1 to 3 NM.
.FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain and
snow. Patchy fog. Vsby 1 to 3 NM.
.SAT...NW winds 5 kt. Waves less than 1 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.SUN...N winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...N winds 5 to 10 kt...becoming NW 15 to 20 kt with gusts
to 25 kt after midnight. Waves 1 to 2 ft.
.MON...N winds 20 to 25 kt...diminishing to 10 to 15 kt after
midnight. Waves 2 to 3 ft...subsiding to 1 ft after midnight.
.TUE...W winds 10 to 15 kt...becoming SW 15 to 20 kt. Waves 1 to
2 ft.

$$