684
FZUS51 KLWX 240132
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
932 PM EDT Tue Sep 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.

ANZ500-240800-
932 PM EDT Tue Sep 23 2025

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

A cold front and cutoff low pressure system will approach the waters
 from the west through Wednesday before stalling over the waters
Thursday into Friday. Small Craft Advisories may be needed at times
Wednesday evening through Friday morning.

$$

ANZ535-240800-
Tidal Potomac from Key Bridge to Indian Head-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...SW winds 5 kt. Waves less than 1 ft. Isolated
showers and tstms late this evening.
.WED...W winds around 5 kt. Waves 1 ft. A chance of showers. Patchy
fog. Vsby 1 to 3 NM.
.WED NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of
showers. Vsby 1 NM or less.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely.
.FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers.
.FRI NIGHT...W winds around 5 kt. Waves 1 ft. A chance of showers.
.SAT...NE winds around 5 kt. Waves 1 ft. A chance of showers.
.SUN...NE winds around 5 kt. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ536-240800-
Tidal Potomac from Indian Head to Cobb Island-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...SW winds 5 kt. Waves less than 1 ft. Isolated
showers late this evening. Patchy fog. Vsby 1 to 3 NM.
.WED...SW winds around 5 kt. Waves 1 ft.
.WED NIGHT...SE winds around 5 kt. Waves 1 ft. A chance of showers.
Vsby 1 NM or less.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers.
.FRI NIGHT...SW winds around 5 kt. Waves 1 ft. A chance of showers.
.SAT...NE winds around 5 kt. Waves 1 ft. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ537-240800-
Tidal Potomac from Cobb Island to Smith Point-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...S winds 5 to 10 kt. Waves 1 ft.
.WED...S winds around 5 kt. Waves 1 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...S winds 5 kt. Waves flat. A chance of showers.
.SAT...E winds 5 kt. Waves less than 1 ft. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ530-240800-
Chesapeake Bay north of Pooles Island-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...SW winds 5 kt. Waves less than 1 ft. Scattered
showers with isolated tstms late this evening, then isolated
showers.
.WED...NW winds around 5 kt. Waves 1 ft or less. Patchy fog. Vsby
1 NM or less.
.WED NIGHT...S winds around 5 kt. Waves 1 ft. Showers likely with a
chance of tstms. Vsby 1 NM or less.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers.
.FRI NIGHT...NW winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...E winds 5 kt. Waves less than 1 ft. A chance of showers.
.SUN...N winds 5 to 10 kt. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ531-240800-
Chesapeake Bay from Pooles Island to Sandy Point-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...S winds 5 kt. Waves less than 1 ft. Scattered
showers with isolated tstms late this evening.
.WED...SW winds around 5 kt. Waves flat. Patchy fog. Vsby 1 to 3 NM.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...W winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...NE winds 5 kt. Waves less than 1 ft. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ538-240800-
Patapsco River including Baltimore Harbor-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...SW winds 5 kt. Waves flat. Scattered showers with
isolated tstms late this evening.
.WED...NE winds around 5 kt. Waves flat. Patchy fog. Vsby 1 to 3 NM.
.WED NIGHT...SE winds 5 kt. Waves flat. Showers likely with a chance
of tstms. Vsby 1 NM or less.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.FRI...W winds 5 kt. Waves flat. A chance of showers.
.FRI NIGHT...W winds 5 kt. Waves flat. A chance of showers.
.SAT...NE winds around 5 kt. Waves flat. A chance of showers.
.SUN...N winds 5 kt. Waves less than 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ539-240800-
Chester River to Queenstown MD-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...S winds 5 kt. Waves less than 1 ft. Scattered
showers with isolated tstms late this evening.
.WED...SW winds around 5 kt. Waves flat.
.WED NIGHT...S winds around 5 kt. Waves 1 ft or less. Showers
likely.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers.
.FRI NIGHT...W winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...NE winds 5 kt. Waves less than 1 ft. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ532-240800-
Chesapeake Bay from Sandy Point to North Beach-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. Scattered
showers with isolated tstms late this evening.
.WED...SW winds 5 kt. Waves less than 1 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...W winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...NE winds 5 kt. Waves less than 1 ft. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ540-240800-
Eastern Bay-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...S winds 5 kt. Waves less than 1 ft. Isolated
showers and tstms late this evening.
.WED...SW winds around 5 kt. Waves flat.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft or less. Showers likely.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...NE winds 5 kt. Waves flat. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ533-240800-
Chesapeake Bay from North Beach to Drum Point-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Isolated showers
and tstms late this evening, then isolated showers.
.WED...S winds around 5 kt. Waves 1 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...E winds 5 kt. Waves less than 1 ft. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ541-240800-
Choptank River to Cambridge MD and the Little Choptank River-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Isolated showers
and tstms late this evening, then isolated showers.
.WED...SW winds 5 kt. Waves less than 1 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...E winds 5 kt. Waves less than 1 ft. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ542-240800-
Patuxent River to Broomes Island MD-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...S winds 5 kt. Waves less than 1 ft. Isolated
showers.
.WED...S winds around 5 kt. Waves 1 ft.
.WED NIGHT...S winds 5 kt. Waves less than 1 ft. A chance of
showers.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers.
.FRI NIGHT...SW winds around 5 kt. Waves 1 ft. A chance of showers.
.SAT...NE winds around 5 kt. Waves 1 ft. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ534-240800-
Chesapeake Bay from Drum Point to Smith Point-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...S winds 10 kt. Waves 1 to 2 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of
showers.
.THU...S winds 10 kt. Waves 2 ft. Showers likely.
.THU NIGHT...SW winds 10 kt. Waves 2 ft. Showers likely with a
chance of tstms.
.FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...S winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers
through the day.

Winds and waves higher and visibilities lower in and near tstms.

$$

ANZ543-240800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
932 PM EDT Tue Sep 23 2025

.REST OF TONIGHT...S winds 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...S winds 10 kt. Waves 1 ft. A chance of showers.
.THU NIGHT...SW winds 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SUN...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the day.

Winds and waves higher and visibilities lower in and near tstms.

$$