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Fort Mchenry Marsh, MD Coastal Forecast

FZUS51 KLWX 251759
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1258 PM EST Thu Dec 25 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.

ANZ500-260900-
1258 PM EST Thu Dec 25 2025

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

A warm front will slowly approach from the southwest today. A cold
front will surge southward tonight. An area of low pressure will
traverse the boundary Friday as it stalls across the Ohio Valley and
Carolinas. A second wave of low pressure will drive a stronger cold
front across the area Sunday night into Monday. Small Craft
Advisories may be needed Saturday. Advisories will likely be needed
Sunday night into Monday. Gale conditions are possible Monday into
Monday night.

$$

ANZ535-260900-
Tidal Potomac from Key Bridge to Indian Head-
1258 PM EST Thu Dec 25 2025

.THIS AFTERNOON...NW winds 5 kt. Waves less than 1 ft.
.TONIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 kt...becoming SE late. Waves 1 ft. A chance of rain
and sleet.
.FRI NIGHT...S winds 5 to 10 kt...becoming W after midnight. Waves
1 ft. Rain.
.SAT...N winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...NE winds around 5 kt. Waves 1 ft.
.SUN...S winds 10 to 15 kt. Waves 1 ft. A chance of rain.
.MON...SW winds 10 to 15 kt...becoming W 15 to 20 kt. Waves 1 to
2 ft. Rain likely, mainly in the morning.

$$

ANZ536-260900-
Tidal Potomac from Indian Head to Cobb Island-
1258 PM EST Thu Dec 25 2025

.THIS AFTERNOON...NW winds 5 kt. Waves less than 1 ft. Isolated
showers.
.TONIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 kt...becoming SE late. Waves 1 ft. A chance of
rain.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain likely.
.SAT...N winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 10 to 15 kt...becoming SW 20 to 25 kt after midnight.
Waves 1 to 2 ft. A chance of rain after midnight.
.MON...SW winds 20 to 25 kt...becoming W. Waves 2 to 3 ft. Rain
likely, mainly in the morning.

$$

ANZ537-260900-
Tidal Potomac from Cobb Island to Smith Point-
1258 PM EST Thu Dec 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING THROUGH
FRIDAY MORNING...

.THIS AFTERNOON...W winds 10 kt. Waves 1 ft. Scattered showers.
.TONIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...NE winds 10 to 15 kt...becoming SE 5 to 10 kt in the
afternoon. Waves 1 to 2 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 ft.
.SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.SUN...SE winds 10 to 15 kt...becoming SW 15 to 20 kt after
midnight. Waves 1 to 2 ft. A chance of rain after midnight.
.MON...SW winds 15 to 20 kt...becoming NW 20 to 25 kt. Waves 3 ft.
Rain likely through the day.

$$

ANZ530-260900-
Chesapeake Bay north of Pooles Island-
1258 PM EST Thu Dec 25 2025

.THIS AFTERNOON...W winds 10 kt...becoming NW late. Waves 1 ft.
.TONIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...NE winds 5 to 10 kt...becoming SE in the afternoon. Waves
1 ft. Sleet and freezing rain likely. Vsby 1 to 3 NM.
.FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. Rain, sleet and
freezing rain.
.SAT...N winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...NE winds around 5 kt. Waves 1 ft or less.
.SUN...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain
through the night. Rain likely after midnight.
.MON...SW winds 20 to 25 kt...becoming W 25 to 30 kt. Waves 2 to
3 ft. Rain through the day.

$$

ANZ531-260900-
Chesapeake Bay from Pooles Island to Sandy Point-
1258 PM EST Thu Dec 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING THROUGH
FRIDAY MORNING...

.THIS AFTERNOON...W winds 5 kt...becoming NW late. Waves 1 ft.
.TONIGHT...N winds 10 to 15 kt. Waves 2 ft.
.FRI...NE winds 5 to 10 kt...becoming SE in the afternoon. Waves
1 to 2 ft. Rain and sleet likely. Vsby 1 to 3 NM.
.FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. Rain, sleet with a
chance of drizzle.
.SAT...N winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft or less.
.SUN...S winds 10 to 15 kt...increasing to 15 to 20 kt after
midnight. Waves 1 to 2 ft...building to 3 ft after midnight. A
chance of rain through the night. Rain likely after midnight.
.MON...SW winds 15 to 20 kt...becoming W 25 to 30 kt. Waves 3 ft.
Rain through the day.

$$

ANZ538-260900-
Patapsco River including Baltimore Harbor-
1258 PM EST Thu Dec 25 2025

.THIS AFTERNOON...NW winds 5 to 10 kt. Waves 1 ft.
.TONIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 kt...becoming SE late. Waves 1 ft. Rain and sleet
likely.
.FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. Rain, sleet with a
chance of drizzle.
.SAT...N winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...NE winds around 5 kt. Waves flat.
.SUN...S winds 5 to 10 kt. Waves 1 ft or less. A chance of rain
through the night. Rain likely after midnight.
.MON...W winds 15 to 20 kt...becoming 20 kt. Waves 2 ft. Rain,
mainly in the morning.

$$

ANZ539-260900-
Chester River to Queenstown MD-
1258 PM EST Thu Dec 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING THROUGH
FRIDAY MORNING...

.THIS AFTERNOON...W winds 5 kt...becoming NW late. Waves 1 ft.
.TONIGHT...N winds 10 to 15 kt. Waves 2 ft.
.FRI...NE winds 5 to 10 kt...becoming SE in the afternoon. Waves
1 ft. Rain and sleet likely.
.FRI NIGHT...SE winds 5 to 10 kt. Waves 1 ft. Rain with possible
sleet and drizzle likely.
.SAT...N winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft or less.
.SUN...S winds 10 to 15 kt...increasing to 15 to 20 kt after
midnight. Waves 1 to 2 ft. A chance of rain.
.MON...SW winds 15 to 20 kt...becoming W 25 to 30 kt. Waves 3 ft.
Rain through the day.

$$

ANZ532-260900-
Chesapeake Bay from Sandy Point to North Beach-
1258 PM EST Thu Dec 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING THROUGH
FRIDAY MORNING...

.THIS AFTERNOON...W winds 10 kt...becoming NW late. Waves 1 ft.
.TONIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...NE winds 10 to 15 kt...becoming SE 5 to 10 kt in the
afternoon. Waves 1 to 2 ft. Rain likely with a chance of sleet.
.FRI NIGHT...S winds 10 to 15 kt...becoming W 5 to 10 kt after
midnight. Waves 1 ft. Rain with possible sleet and drizzle likely.
.SAT...N winds 10 to 15 kt. Waves 1 ft.
.SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.SUN...SE winds 5 to 10 kt...becoming S 15 to 20 kt. Waves 1 to
2 ft...building to 3 ft. A chance of rain.
.MON...SW winds 20 to 25 kt...becoming W 25 to 30 kt. Waves 3 ft.
Rain through the day.

$$

ANZ540-260900-
Eastern Bay-
1258 PM EST Thu Dec 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING THROUGH
FRIDAY MORNING...

.THIS AFTERNOON...W winds 5 kt. Waves less than 1 ft.
.TONIGHT...N winds 10 to 15 kt. Waves 1 ft.
.FRI...NE winds 5 to 10 kt...becoming SE in the afternoon. Waves
1 ft. A chance of rain and sleet.
.FRI NIGHT...SE winds 5 to 10 kt...becoming W after midnight. Waves
1 ft. Rain with possible sleet and drizzle likely.
.SAT...N winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft or less.
.SUN...S winds 10 to 15 kt...increasing to 15 to 20 kt after
midnight. Waves 1 ft or less...building to 2 ft. A chance of rain.
.MON...SW winds 15 to 20 kt...becoming W 25 to 30 kt. Waves 3 ft.
Rain through the day.

$$

ANZ533-260900-
Chesapeake Bay from North Beach to Drum Point-
1258 PM EST Thu Dec 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING THROUGH
FRIDAY MORNING...

.THIS AFTERNOON...W winds 10 kt...becoming NW late. Waves 1 ft.
Isolated showers.
.TONIGHT...N winds 15 to 20 kt. Waves 3 ft.
.FRI...NE winds 10 to 15 kt...becoming SE 5 to 10 kt in the
afternoon. Waves 1 to 2 ft. A chance of rain.
.FRI NIGHT...S winds 10 to 15 kt...becoming W 5 to 10 kt after
midnight. Waves 1 ft. Rain with a chance of drizzle.
.SAT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT NIGHT...NE winds 10 to 15 kt...diminishing to 5 kt after
midnight. Waves 1 to 2 ft.
.SUN...SE winds 5 kt...becoming S 20 to 25 kt. Waves 1 to 2 ft...
building to 3 ft. A chance of rain through the night.
.MON...SW winds 25 to 30 kt...becoming NW. Waves 3 ft...building to
4 ft. Rain likely through the day.

$$

ANZ541-260900-
Choptank River to Cambridge MD and the Little Choptank River-
1258 PM EST Thu Dec 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING THROUGH
FRIDAY MORNING...

.THIS AFTERNOON...W winds 10 kt. Waves 1 ft. Isolated showers.
.TONIGHT...N winds 15 to 20 kt. Waves 2 ft.
.FRI...NE winds 10 to 15 kt...becoming SE 5 to 10 kt in the
afternoon. Waves 1 ft. A chance of rain and sleet.
.FRI NIGHT...S winds 10 to 15 kt...becoming W 5 to 10 kt after
midnight. Waves 1 ft. Rain with possible sleet and drizzle likely.
.SAT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SAT NIGHT...NE winds 10 to 15 kt...diminishing to around 5 kt after
midnight. Waves 1 ft.
.SUN...SE winds 5 to 10 kt...becoming S 20 to 25 kt. Waves 1 to
2 ft...building to 3 ft after midnight. A chance of rain through the
night.
.MON...SW winds 20 to 25 kt...becoming NW 25 to 30 kt. Waves 3 ft.
Rain through the day.

$$

ANZ542-260900-
Patuxent River to Broomes Island MD-
1258 PM EST Thu Dec 25 2025

.THIS AFTERNOON...W winds 10 kt. Waves 1 ft. Scattered showers.
.TONIGHT...N winds 10 to 15 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt...becoming SE late. 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 1 ft.
.SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt...becoming SW 10 to 15 kt after midnight.
Waves 1 ft. A chance of rain after midnight.
.MON...W winds 15 to 20 kt...becoming NW. Waves 1 ft. Rain likely
through the day.

$$

ANZ534-260900-
Chesapeake Bay from Drum Point to Smith Point-
1258 PM EST Thu Dec 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING THROUGH
FRIDAY MORNING...

.THIS AFTERNOON...W winds 10 kt...becoming NW late. Waves 1 to 2 ft.
Scattered showers.
.TONIGHT...N winds 15 to 20 kt. Waves 3 ft.
.FRI...NE winds 10 to 15 kt...becoming SE 5 to 10 kt in the
afternoon. Waves 3 ft...subsiding to 1 ft in the afternoon. 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.
.SAT NIGHT...NE winds 10 to 15 kt...diminishing to 5 kt after
midnight. Waves 1 to 2 ft.
.SUN...SE winds 5 to 10 kt...becoming S 15 to 20 kt. Waves 1 ft...
building to 3 ft. A chance of rain after midnight.
.MON...SW winds 20 to 25 kt...becoming NW 25 to 30 kt. Waves 4 ft.
Rain through the day.

$$

ANZ543-260900-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1258 PM EST Thu Dec 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EST THIS EVENING THROUGH
FRIDAY MORNING...

.THIS AFTERNOON...SW winds 10 kt...becoming NW late. Waves 1 ft.
Scattered showers.
.TONIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...NE winds 10 to 15 kt...becoming SE 5 to 10 kt in the
afternoon. Waves 1 to 2 ft. A chance of rain.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Rain with a chance of
drizzle.
.SAT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.SUN...E winds 5 kt...becoming S in the afternoon, then increasing
to 15 to 20 kt. Waves 1 to 2 ft. A chance of rain after midnight.
.MON...SW winds 15 to 20 kt...becoming NW 25 to 30 kt. Waves 2 to
3 ft. A chance of rain in the morning, then rain likely in the
afternoon.

$$



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