Your Ultimate Boating Resource

HomeForecastsMaryland ForecastsBaltimore, MD - Fort Mchenry Coastal Forecast

Baltimore, MD - Fort Mchenry Coastal Forecast

FZUS51 KLWX 230558
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1258 AM EST Tue Dec 23 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.

ANZ500-232100-
1258 AM EST Tue Dec 23 2025

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

A warm front will lift into the area today, with a cold front
following this evening. Another transient area of high pressure on
Wednesday may give way to a warm front Thursday. This front may
stall nearby until a wave of low pressure pushes the boundary
southward Friday night. Small Craft Advisories may be needed late
tonight night into Wednesday as well as Friday.

$$

ANZ535-232100-
Tidal Potomac from Key Bridge to Indian Head-
1258 AM EST Tue Dec 23 2025

.OVERNIGHT...S winds 5 kt. Waves less than 1 ft. A chance of rain.
.TUE...S winds 5 to 10 kt. Waves 1 ft. Rain likely.
.TUE NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.WED NIGHT...E winds around 5 kt. Waves 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.THU NIGHT...N winds 5 kt. Waves less than 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft. Rain. A chance of rain after
midnight.
.SAT...E winds around 5 kt. Waves 1 ft. A chance of rain after
midnight.

$$

ANZ536-232100-
Tidal Potomac from Indian Head to Cobb Island-
1258 AM EST Tue Dec 23 2025

.OVERNIGHT...S winds 10 kt. Waves 1 ft. A chance of rain.
.TUE...SW winds 5 to 10 kt. Waves 1 ft. Rain likely.
.TUE NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.WED NIGHT...NE winds around 5 kt...becoming S after midnight. Waves
1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.THU NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft. Rain. A chance of rain after
midnight.
.SAT...E winds 5 kt. Waves less than 1 ft.

$$

ANZ537-232100-
Tidal Potomac from Cobb Island to Smith Point-
1258 AM EST Tue Dec 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

.OVERNIGHT...S winds 10 kt with gusts to 20 kt. Waves 1 ft. A slight
chance of rain.
.TUE...SW winds 10 to 15 kt...diminishing to 5 to 10 kt late. Gusts
up to 20 kt. Waves 2 ft. Rain likely.
.TUE NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.WED NIGHT...NE winds around 5 kt...becoming SE after midnight.
Waves 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.THU NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft. A chance of rain in the
morning. Rain likely through the night, then a chance of rain after
midnight.
.SAT...NE winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.


$$

ANZ530-232100-
Chesapeake Bay north of Pooles Island-
1258 AM EST Tue Dec 23 2025

.OVERNIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of snow. Vsby
1 to 3 NM.
.TUE...S winds 5 to 10 kt. Waves 1 ft. Rain likely. Vsby 1 to 3 NM.
.TUE NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.WED...NW winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
.WED NIGHT...NE winds around 5 kt. Waves flat.
.THU...SW winds 5 kt. Waves less than 1 ft. A chance of rain.
.THU NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft. Snow, sleet with a chance of
freezing rain through the day. Rain. Freezing rain through the
night.
.SAT...E winds 5 to 10 kt. Waves 1 ft or less. A chance of rain in
the morning. A chance of rain through the night.

$$

ANZ531-232100-
Chesapeake Bay from Pooles Island to Sandy Point-
1258 AM EST Tue Dec 23 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EST TODAY...

.OVERNIGHT...S winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of snow with a slight chance of rain. Vsby 1 to 3 NM.
.TUE...S winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 kt
late. Waves 2 ft. Rain likely.
.TUE NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.WED...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.WED NIGHT...NE winds around 5 kt. Waves 1 ft or less.
.THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.THU NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft. A chance of rain, snow and
freezing rain in the morning. Rain through the night, then a chance
of rain after midnight.
.SAT...E winds 5 to 10 kt. Waves 1 ft. A chance of rain in the
morning. A chance of rain after midnight.

$$

ANZ538-232100-
Patapsco River including Baltimore Harbor-
1258 AM EST Tue Dec 23 2025

.OVERNIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of rain and
snow. Vsby 1 to 3 NM.
.TUE...S winds 5 to 10 kt. Waves 1 ft. Rain likely.
.TUE NIGHT...W winds 5 to 10 kt. Waves 1 ft or less.
.WED...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.WED NIGHT...NE winds around 5 kt. Waves flat.
.THU...SW winds 5 kt. Waves less than 1 ft. A chance of rain.
.THU NIGHT...N winds 5 kt. Waves less than 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft. A chance of rain and snow in
the morning. Rain through the night, then a chance of rain after
midnight.
.SAT...E winds around 5 kt. Waves 1 ft or less. A chance of rain in
the morning. A chance of rain after midnight.

$$

ANZ539-232100-
Chester River to Queenstown MD-
1258 AM EST Tue Dec 23 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EST TODAY...

.OVERNIGHT...S winds 10 kt with gusts to 20 kt. Waves 1 ft. A chance
of rain and snow. Vsby 1 to 3 NM.
.TUE...S winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 kt
late. Waves 2 ft. Rain likely.
.TUE NIGHT...W winds 10 to 15 kt. Waves 1 to 2 ft.
.WED...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.WED NIGHT...E winds around 5 kt. Waves 1 ft or less.
.THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.THU NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft. A chance of rain and snow in
the morning. Rain through the night, then a chance of rain after
midnight.
.SAT...NE winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft
or less. A chance of rain in the morning. A chance of rain after
midnight.

$$

ANZ532-232100-
Chesapeake Bay from Sandy Point to North Beach-
1258 AM EST Tue Dec 23 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EST TODAY...

.OVERNIGHT...S winds 15 kt with gusts to 20 kt. Waves 2 ft. A chance
of rain with a slight chance of snow. Vsby 1 to 3 NM.
.TUE...S winds 10 to 15 kt. Gusts up to 25 kt until late afternoon.
Waves 2 to 3 ft. Rain likely.
.TUE NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 15 to 20 kt. Waves 2 ft.
.WED NIGHT...N winds 5 kt...becoming SE after midnight. Waves 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.THU NIGHT...N winds 10 to 15 kt. Waves 1 ft.
.FRI...E winds 10 kt. Waves 1 ft. A chance of rain and snow in the
morning. Rain through the night, then a chance of rain after
midnight.
.SAT...NE winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.
A chance of rain after midnight.

$$

ANZ540-232100-
Eastern Bay-
1258 AM EST Tue Dec 23 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EST TODAY...

.OVERNIGHT...S winds 10 kt with gusts to 20 kt. Waves 1 ft. A chance
of rain with a slight chance of snow. Vsby 1 to 3 NM.
.TUE...S winds 10 to 15 kt. Gusts up to 25 kt until late afternoon.
Waves 2 ft. Rain likely.
.TUE NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.WED NIGHT...E winds around 5 kt. Waves flat.
.THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.THU NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft. A chance of rain and snow in
the morning. Rain through the night, then a chance of rain after
midnight.
.SAT...NE winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft
or less. A chance of rain after midnight.

$$

ANZ533-232100-
Chesapeake Bay from North Beach to Drum Point-
1258 AM EST Tue Dec 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

.OVERNIGHT...S winds 15 kt with gusts to 20 kt. Waves 2 ft. A slight
chance of rain. Vsby 1 to 3 NM.
.TUE...SW winds 10 to 15 kt. Gusts up to 25 kt until late afternoon.
Waves 2 to 3 ft. Rain likely.
.TUE NIGHT...W winds 10 to 15 kt. Waves 1 to 2 ft.
.WED...NW winds 15 to 20 kt. Waves 2 ft.
.WED NIGHT...N winds 5 kt...becoming SE after midnight. Waves 1 ft.
.THU...S winds 10 to 15 kt...becoming W 5 to 10 kt in the afternoon.
Waves 1 ft. A chance of rain.
.THU NIGHT...N winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI...NE winds 10 to 15 kt...becoming E 5 to 10 kt. Waves 1 to
2 ft. A chance of rain in the morning. Rain through the night, then
a chance of rain after midnight.
.SAT...NE winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.
A chance of rain after midnight.

$$

ANZ541-232100-
Choptank River to Cambridge MD and the Little Choptank River-
1258 AM EST Tue Dec 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

.OVERNIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
slight chance of rain. Vsby 1 to 3 NM.
.TUE...S winds 10 to 15 kt. Gusts up to 25 kt until late afternoon.
Waves 2 ft. Rain likely.
.TUE NIGHT...W winds 10 to 15 kt. Waves 1 ft.
.WED...NW winds 15 to 20 kt. Waves 2 ft.
.WED NIGHT...N winds around 5 kt...becoming SE after midnight. Waves
1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.THU NIGHT...N winds 10 to 15 kt. Waves 1 ft.
.FRI...E winds 10 to 15 kt. Waves 1 ft. A chance of rain and snow in
the morning. Rain through the night, then a chance of rain after
midnight.
.SAT...NE winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.
A chance of rain after midnight.

$$

ANZ542-232100-
Patuxent River to Broomes Island MD-
1258 AM EST Tue Dec 23 2025

.OVERNIGHT...S winds 10 kt. Waves 1 ft. A slight chance of rain.
.TUE...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. Rain
likely.
.TUE NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.WED NIGHT...E winds around 5 kt. Waves 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.
.THU NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft. A chance of rain in the
morning. Rain through the night, then a chance of rain after
midnight.
.SAT...NE winds around 5 kt. Waves 1 ft.

$$

ANZ534-232100-
Chesapeake Bay from Drum Point to Smith Point-
1258 AM EST Tue Dec 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

.OVERNIGHT...S winds 15 kt with gusts to 20 kt. Waves 2 ft. A slight
chance of rain.
.TUE...SW winds 15 to 20 kt with gusts to 25 kt... diminishing to
5 to 10 kt late. Waves 3 ft. Rain likely.
.TUE NIGHT...W winds 10 to 15 kt. Waves 1 to 2 ft.
.WED...NW winds 15 to 20 kt. Waves 3 ft.
.WED NIGHT...N winds 5 kt...becoming SE after midnight. Waves 1 ft.
.THU...S winds 10 to 15 kt...becoming W in the afternoon. Waves
2 ft. A chance of rain.
.THU NIGHT...N winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI...E winds 10 to 15 kt...becoming 10 kt. Waves 1 to 2 ft. A
chance of rain in the morning. Rain likely through the night, then a
chance of rain after midnight.
.SAT...NE winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.


$$

ANZ543-232100-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1258 AM EST Tue Dec 23 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

.OVERNIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
slight chance of rain.
.TUE...S winds 15 to 20 kt with gusts to 25 kt... becoming SW 5 to
10 kt with gusts to 20 kt late. Waves 2 ft. Rain likely.
.TUE NIGHT...W winds 10 to 15 kt. Waves 1 ft.
.WED...NW winds 15 to 20 kt. Waves 2 ft.
.WED NIGHT...N winds 5 to 10 kt...becoming SE after midnight. Waves
1 ft.
.THU...S winds 10 to 15 kt...becoming W in the afternoon. Waves
1 ft. A chance of rain.
.THU NIGHT...N winds 10 to 15 kt. Waves 1 ft.
.FRI...E winds 5 to 10 kt. Waves 1 ft. A chance of rain in the
morning. Rain likely through the night, then a chance of rain after
midnight.
.SAT...NE winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.


$$



Don't Miss