309
FZUS51 KLWX 040235
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1034 PM EDT Wed Sep 3 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.

ANZ500-040800-
1034 PM EDT Wed Sep 3 2025

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

High pressure will slowly move eastward from the eastern seaboard
through tonight. The next front will approach the waters late
Thursday, followed by a stronger cold front on Saturday. Small Craft
 Advisories may be needed at times from Thursday through Sunday.

$$

ANZ535-040800-
Tidal Potomac from Key Bridge to Indian Head-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.REST OF TONIGHT...S winds 5 kt. Waves less than 1 ft.
.THU...S winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt until early
morning. Waves 1 ft. A chance of showers and tstms.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SUN...N winds around 5 kt. Waves 1 ft. A chance of showers in the
morning.
.MON...NE winds around 5 kt. Waves 1 ft.

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

$$

ANZ536-040800-
Tidal Potomac from Indian Head to Cobb Island-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.REST OF TONIGHT...S winds 10 kt. Waves 1 ft.
.THU...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.THU NIGHT...S winds 15 to 20 kt...becoming SW 5 to 10 kt late.
Waves 1 ft. A chance of showers and tstms.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SUN...N winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.
.MON...NE winds 5 kt. Waves less than 1 ft.

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

$$

ANZ537-040800-
Tidal Potomac from Cobb Island to Smith Point-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.REST OF TONIGHT...S winds 10 kt. Waves 1 ft.
.THU...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 to
3 ft.
.FRI...SW winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI NIGHT...S winds 10 to 15 kt. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...N winds 10 kt. Waves 1 ft. A chance of showers.
.SUN...N winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

$$

ANZ530-040800-
Chesapeake Bay north of Pooles Island-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.REST OF TONIGHT...S winds 10 kt. Waves 1 ft.
.THU...S winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
.THU NIGHT...S winds 15 to 20 kt with gusts to 25 kt...diminishing
to 5 to 10 kt late. Waves 1 to 2 ft. A chance of showers and tstms.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.
.MON...N winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ531-040800-
Chesapeake Bay from Pooles Island to Sandy Point-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT...

.REST OF TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves
1 to 2 ft.
.THU...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.
.THU NIGHT...S winds 15 to 20 kt. Gusts up to 25 kt until early
morning. Waves 2 to 3 ft. A chance of showers and tstms.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.SAT NIGHT...N winds 10 kt. Waves 1 ft. A chance of showers.
.SUN...N winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ538-040800-
Patapsco River including Baltimore Harbor-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.REST OF TONIGHT...S winds 10 kt. Waves 1 ft.
.THU...S winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt until early
morning. Waves 1 ft. A chance of showers and tstms.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 ft or less. Showers likely with
a chance of tstms.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.
.MON...NE winds 5 kt. Waves less than 1 ft.

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

$$

ANZ539-040800-
Chester River to Queenstown MD-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.REST OF TONIGHT...S winds 10 kt. Waves 1 ft.
.THU...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers and tstms.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft. Showers likely.
.SUN...N winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ532-040800-
Chesapeake Bay from Sandy Point to North Beach-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT...

.REST OF TONIGHT...S winds 15 kt with gusts to 20 kt. Waves 2 ft.
.THU...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.
.THU NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A
chance of showers and tstms.
.FRI...S winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI NIGHT...S winds 10 kt. Waves 2 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.SAT NIGHT...N winds 10 kt. Waves 1 ft. A chance of showers.
.SUN...N winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ540-040800-
Eastern Bay-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.REST OF TONIGHT...S winds 10 kt with gusts to 20 kt. Waves 1 ft.
.THU...S winds 15 to 20 kt. Waves 1 to 2 ft.
.THU NIGHT...S winds 15 to 20 kt. Waves 2 ft. A chance of showers
and tstms.
.FRI...S winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.SAT NIGHT...N winds 10 kt. Waves 1 ft. Showers likely.
.SUN...N winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ533-040800-
Chesapeake Bay from North Beach to Drum Point-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT...

.REST OF TONIGHT...S winds 15 kt with gusts to 20 kt. Waves 2 ft.
.THU...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.
.THU NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.FRI...S winds 10 to 15 kt. Waves 2 ft.
.FRI NIGHT...S winds 10 to 15 kt. Waves 2 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of
showers.
.SUN...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in
the morning.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

$$

ANZ541-040800-
Choptank River to Cambridge MD and the Little Choptank River-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.REST OF TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves
1 ft.
.THU...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.FRI...S winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI NIGHT...S winds 10 to 15 kt. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...N winds 10 to 15 kt. Waves 1 ft. A chance of showers.
.SUN...N winds 10 to 15 kt. Waves 1 ft. A chance of showers in the
morning.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

$$

ANZ542-040800-
Patuxent River to Broomes Island MD-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.REST OF TONIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SUN...N winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

$$

ANZ534-040800-
Chesapeake Bay from Drum Point to Smith Point-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.REST OF TONIGHT...S winds 10 kt. Waves 2 ft.
.THU...S winds 15 to 20 kt. Gusts up to 25 kt late. Waves 2 ft...
building to 4 ft in the afternoon.
.THU NIGHT...S winds 20 to 25 kt. Waves 3 ft.
.FRI...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...S winds 10 to 15 kt. Waves 2 ft. A chance of showers.
.SAT NIGHT...N winds 10 to 15 kt. Waves 2 ft. A chance of showers.
.SUN...N winds 10 to 15 kt. Waves 2 ft. A chance of showers.
.MON...N winds 10 to 15 kt...becoming NE after midnight. Waves 1 to
2 ft.

$$

ANZ543-040800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1034 PM EDT Wed Sep 3 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.REST OF TONIGHT...S winds 10 kt. Waves 1 ft.
.THU...S winds 15 to 20 kt. Gusts up to 25 kt late. Waves 2 ft.
.THU NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.FRI...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...S winds 10 to 15 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...N winds 10 to 15 kt. Waves 1 ft. A chance of showers.
.SUN...N winds 10 to 15 kt. Waves 1 ft. A chance of showers.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

$$