863
FZUS51 KLWX 171135
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
735 AM EDT Thu Jul 17 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.

ANZ500-172000-
735 AM EDT Thu Jul 17 2025

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

A cold front will move over the waters tonight. Another cold front
may move over the waters Sunday night. Small Craft Advisories may be
 needed Thursday night for portions of the waters.

$$

ANZ535-172000-
Tidal Potomac from Key Bridge to Indian Head-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 10 kt with gusts to 20 kt. Waves 1 ft.
.TONIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.FRI NIGHT...E winds around 5 kt. Waves 1 ft or less. A chance of
showers and tstms.
.SAT...SE winds around 5 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.SAT NIGHT...SW winds around 5 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...NW winds around 5 kt. Waves 1 ft. A chance of showers and
tstms through the night.
.MON...NE winds around 5 kt. Waves 1 ft.

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

$$

ANZ536-172000-
Tidal Potomac from Indian Head to Cobb Island-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 10 kt with gusts to 20 kt. Waves 1 ft.
.TONIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds around 5 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.FRI NIGHT...SE winds around 5 kt. Waves 1 ft or less. A chance of
showers and tstms.
.SAT...SE winds around 5 kt. Waves 1 ft. A chance of showers and
tstms.
.SAT NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SUN...NW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms through the night.
.MON...NE winds around 5 kt. Waves 1 ft.

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

$$

ANZ537-172000-
Tidal Potomac from Cobb Island to Smith Point-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 15 kt with gusts to 25 kt. Waves 2 ft.
.TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt... becoming W
5 to 10 kt late. Waves 1 to 2 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.FRI NIGHT...SE winds around 5 kt. Waves 1 ft or less. A chance of
showers and tstms.
.SAT...SE winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.SAT NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ530-172000-
Chesapeake Bay north of Pooles Island-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft. A
slight chance of showers and tstms this afternoon.
.TONIGHT...W winds 5 to 10 kt...becoming NW late. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 5 kt. Waves less than 1 ft.
.SAT...SE winds 5 kt. Waves less than 1 ft. A chance of showers.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers. A
chance of tstms through the night.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ531-172000-
Chesapeake Bay from Pooles Island to Sandy Point-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.TONIGHT...W winds 10 kt...becoming NW late. Waves 1 to 2 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 5 kt. Waves less than 1 ft.
.SAT...SE winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SAT NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms through the night.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ538-172000-
Patapsco River including Baltimore Harbor-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 10 kt with gusts to 20 kt. Waves 1 ft.
.TONIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 kt. Waves flat.
.FRI NIGHT...E winds around 5 kt. Waves flat.
.SAT...SE winds around 5 kt. Waves 1 ft or less. Showers likely with
a chance of tstms.
.SAT NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SUN...NW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms through the night.
.MON...NE winds 5 kt. Waves less than 1 ft.

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

$$

ANZ539-172000-
Chester River to Queenstown MD-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.TONIGHT...W winds 5 to 10 kt...becoming NW late. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...E winds around 5 kt. Waves flat.
.SAT...SE winds 5 kt. Waves flat. A chance of showers and tstms.
.SAT NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms through the night.
.MON...NE winds 5 to 10 kt. Waves 1 ft or less.

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

$$

ANZ532-172000-
Chesapeake Bay from Sandy Point to North Beach-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.TONIGHT...W winds 5 to 10 kt...becoming NW late. Waves 1 to 2 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...E winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...SE winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.
.SAT NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms through the night.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ540-172000-
Eastern Bay-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.TONIGHT...W winds 5 to 10 kt...becoming NW late. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...E winds around 5 kt. Waves flat. A chance of showers.
.SAT...SE winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.
.SAT NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms through the night.
.MON...NE winds 5 to 10 kt. Waves 1 ft or less.

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

$$

ANZ533-172000-
Chesapeake Bay from North Beach to Drum Point-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.TONIGHT...W winds 5 to 10 kt. Waves 1 to 2 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...E winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...SE winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.SAT NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms through the night.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ541-172000-
Choptank River to Cambridge MD and the Little Choptank River-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.TONIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...E winds around 5 kt. Waves flat. A chance of showers.
.SAT...SE winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SAT NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms through the night.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ542-172000-
Patuxent River to Broomes Island MD-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 10 kt with gusts to 20 kt. Waves 1 ft.
.TONIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.FRI NIGHT...E winds around 5 kt. Waves 1 ft. A chance of showers
and tstms.
.SAT...SE winds around 5 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.SAT NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SUN...NW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms through the night.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ534-172000-
Chesapeake Bay from Drum Point to Smith Point-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.
.TONIGHT...SW winds 10 to 15 kt...becoming W late. Gusts up to
20 kt. Waves 2 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.FRI NIGHT...NE winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SAT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.SAT NIGHT...SW winds 10 kt. Waves 1 ft. A chance of showers and
tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ543-172000-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
735 AM EDT Thu Jul 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.TODAY...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.TONIGHT...SW winds 10 to 15 kt...becoming W late. Gusts up to
20 kt. Waves 1 to 2 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 5 kt. Waves less than 1 ft. A chance of
showers.
.SAT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.SAT NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance
of tstms.
.MON...NE winds 5 to 10 kt. Waves 1 ft.

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

$$