187
FZUS51 KLWX 090558
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1258 AM EST Tue Dec 9 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.

ANZ500-092100-
1258 AM EST Tue Dec 9 2025

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

A strong area of Canadian high pressure will build over the region
tonight into Tuesday. A clipper-like system moves through the area
by mid-week before a secondary cold front crosses the waters on
Thursday. Weak high pressure returns by Friday. Small Craft
Advisories will likely be needed Tuesday evening through Thursday,
and potentially again late Friday.

$$

ANZ535-092100-
Tidal Potomac from Key Bridge to Indian Head-
1258 AM EST Tue Dec 9 2025

.OVERNIGHT...N winds 5 kt. Waves less than 1 ft.
.TUE...NE winds around 5 kt...becoming S in the afternoon. Waves
1 ft.
.TUE NIGHT...S winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.WED...S winds 10 to 15 kt with gusts to 30 kt. Waves 2 ft. A chance
of rain.
.WED NIGHT...W winds 5 to 10 kt with gusts to 25 kt. Waves 1 ft.
.THU...NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
.THU NIGHT...NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.FRI...W winds 10 to 15 kt. Waves 1 ft.
.SAT...NW winds 15 to 20 kt...diminishing to 5 to 10 kt after
midnight. Waves 1 to 2 ft. A chance of snow after midnight.

$$

ANZ536-092100-
Tidal Potomac from Indian Head to Cobb Island-
1258 AM EST Tue Dec 9 2025

.OVERNIGHT...N winds 5 to 10 kt. Waves 1 ft.
.TUE...E winds around 5 kt...becoming S late. Waves 1 ft.
.TUE NIGHT...SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 to
2 ft.
.WED...S winds 15 kt with gusts to 30 kt. Waves 2 ft.
.WED NIGHT...W winds 10 to 15 kt with gusts to 25 kt. Waves 1 to
2 ft.
.THU...NW winds 10 kt with gusts to 20 kt. Waves 1 ft.
.THU NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt...becoming SW 10 to 15 kt. Waves 1 ft.
.SAT...NW winds 15 to 20 kt...diminishing to 10 to 15 kt after
midnight. Waves 1 to 2 ft. A chance of rain and snow after midnight.


$$

ANZ537-092100-
Tidal Potomac from Cobb Island to Smith Point-
1258 AM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EST EARLY THIS
MORNING...

.OVERNIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.TUE...N winds 5 to 10 kt...becoming S in the afternoon. Waves 1 ft.
.TUE NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.WED...SW winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.
.WED NIGHT...W winds 15 to 20 kt with gusts to 30 kt. Waves 2 to
3 ft.
.THU...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.THU NIGHT...NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 to
2 ft.
.FRI...W winds 5 to 10 kt...becoming SW 10 to 15 kt. Waves 1 to
2 ft.
.SAT...NW winds 15 to 20 kt. Waves 3 ft.

$$

ANZ530-092100-
Chesapeake Bay north of Pooles Island-
1258 AM EST Tue Dec 9 2025

.OVERNIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.TUE...E winds around 5 kt...becoming S late. Waves 1 ft or less.
.TUE NIGHT...SW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.WED...S winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft. Rain
likely.
.WED NIGHT...W winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU...W winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.FRI...W winds 15 to 20 kt. Waves 1 ft. A chance of snow in the
evening.
.SAT...W winds 20 to 25 kt. Waves 2 ft. A chance of snow after
midnight.

$$

ANZ531-092100-
Chesapeake Bay from Pooles Island to Sandy Point-
1258 AM EST Tue Dec 9 2025

.OVERNIGHT...NE winds 10 kt. Waves 1 to 2 ft.
.TUE...NE winds 5 kt...becoming S 10 to 15 kt in the afternoon.
Waves 1 ft.
.TUE NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.WED...S winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. A chance
of rain.
.WED NIGHT...W winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.THU...W winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.FRI...W winds 15 to 20 kt. Waves 1 to 2 ft. A chance of snow in the
evening.
.SAT...W winds 20 to 25 kt. Waves 3 ft. A chance of snow after
midnight.

$$

ANZ538-092100-
Patapsco River including Baltimore Harbor-
1258 AM EST Tue Dec 9 2025

.OVERNIGHT...N winds 5 kt. Waves less than 1 ft.
.TUE...E winds around 5 kt...becoming S late. Waves 1 ft or less.
.TUE NIGHT...SW winds 10 kt with gusts to 20 kt. Waves 1 ft.
.WED...S winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. A chance
of rain.
.WED NIGHT...W winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
.THU...W winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
.THU NIGHT...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.FRI...W winds 10 to 15 kt. Waves 1 ft. A chance of snow in the
evening.
.SAT...W winds 15 to 20 kt. Waves 1 to 2 ft. A chance of snow after
midnight.

$$

ANZ539-092100-
Chester River to Queenstown MD-
1258 AM EST Tue Dec 9 2025

.OVERNIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.TUE...E winds 5 kt...becoming S late. Waves 1 ft.
.TUE NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.WED...S winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A chance
of rain.
.WED NIGHT...W winds 15 to 20 kt with gusts to 25 kt. Waves 2 to
3 ft.
.THU...NW winds 10 to 15 kt with gusts to 25 kt. Waves 3 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...W winds 10 to 15 kt...becoming SW 15 to 20 kt after midnight.
Waves 2 ft. A chance of snow in the evening.
.SAT...NW winds 15 to 20 kt. Waves 3 ft. A chance of snow after
midnight.

$$

ANZ532-092100-
Chesapeake Bay from Sandy Point to North Beach-
1258 AM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EST EARLY THIS
MORNING...

.OVERNIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.TUE...NE winds 5 kt...becoming S 10 to 15 kt in the afternoon.
Waves 1 ft.
.TUE NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.WED...S winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. A chance
of rain.
.WED NIGHT...W winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.THU...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...W winds 10 to 15 kt...becoming SW 15 to 20 kt. Waves 1 to
2 ft. A chance of snow and rain in the evening.
.SAT...NW winds 25 to 30 kt. Waves 3 ft. A chance of snow and rain
after midnight.

$$

ANZ540-092100-
Eastern Bay-
1258 AM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EST EARLY THIS
MORNING...

.OVERNIGHT...NE winds 10 kt. Waves 1 ft.
.TUE...E winds 5 kt...becoming S late. Waves 1 ft.
.TUE NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.WED...S winds 15 to 20 kt with gusts to 30 kt. Waves 2 to 3 ft. A
chance of rain.
.WED NIGHT...W winds 15 to 20 kt with gusts to 25 kt. Waves 2 to
3 ft.
.THU...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.FRI...W winds 10 to 15 kt...becoming SW 15 to 20 kt after midnight.
Waves 1 to 2 ft. A chance of snow and rain in the evening.
.SAT...NW winds 20 to 25 kt. Waves 2 to 3 ft. A chance of snow after
midnight.

$$

ANZ533-092100-
Chesapeake Bay from North Beach to Drum Point-
1258 AM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EST EARLY THIS
MORNING...

.OVERNIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 to
3 ft.
.TUE...NE winds 5 to 10 kt...becoming S early in the afternoon, then
increasing to 10 to 15 kt late. Waves 1 ft.
.TUE NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.WED...SW winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. A
chance of rain.
.WED NIGHT...W winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.
.THU...NW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...W winds 10 to 15 kt...becoming SW 15 to 20 kt. Waves 2 ft.
.SAT...NW winds 25 to 30 kt. Waves 3 ft. A chance of rain and snow
after midnight.

$$

ANZ541-092100-
Choptank River to Cambridge MD and the Little Choptank River-
1258 AM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EST EARLY THIS
MORNING...

.OVERNIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.TUE...NE winds 5 to 10 kt...becoming S early in the afternoon, then
increasing to 10 to 15 kt late. Waves 1 ft.
.TUE NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.WED...S winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. A chance
of rain.
.WED NIGHT...W winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.
.THU...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...W winds 10 to 15 kt...becoming SW 15 to 20 kt. Waves 2 ft.
.SAT...NW winds 20 to 25 kt. Waves 3 ft. A chance of rain and snow
after midnight.

$$

ANZ542-092100-
Patuxent River to Broomes Island MD-
1258 AM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EST EARLY THIS
MORNING...

.OVERNIGHT...NE winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.TUE...NE winds 5 kt...becoming S late. Waves 1 ft.
.TUE NIGHT...SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
.WED...SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
.WED NIGHT...W winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
.THU...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.THU NIGHT...NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.FRI...W winds 10 to 15 kt. Waves 1 ft.
.SAT...W winds 15 to 20 kt...becoming NW 10 to 15 kt after midnight.
Waves 1 ft. A chance of rain and snow after midnight.

$$

ANZ534-092100-
Chesapeake Bay from Drum Point to Smith Point-
1258 AM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EST EARLY THIS
MORNING...

.OVERNIGHT...N winds 15 to 20 kt. Waves 3 ft.
.TUE...N winds 5 to 10 kt...becoming S in the afternoon. Waves 1 to
2 ft.
.TUE NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.WED...SW winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.
.WED NIGHT...W winds 15 to 20 kt with gusts to 30 kt. Waves 4 ft.
.THU...NW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 to
3 ft.
.FRI...W winds 10 to 15 kt...becoming SW 15 to 20 kt. Waves 2 to
3 ft.
.SAT...NW winds 20 to 25 kt. Waves 4 ft.

$$

ANZ543-092100-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1258 AM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EST EARLY THIS
MORNING...

.OVERNIGHT...N winds 15 kt with gusts to 25 kt. Waves 2 ft.
.TUE...N winds 5 to 10 kt...becoming SW in the afternoon. Waves
1 ft.
.TUE NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.WED...SW winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.
.WED NIGHT...W winds 20 to 25 kt with gusts to 30 kt. Waves 2 to
3 ft.
.THU...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...W winds 10 to 15 kt...becoming SW 20 to 25 kt. Waves 1 to
2 ft.
.SAT...NW winds 20 to 25 kt. Waves 2 to 3 ft.

$$