511
FZUS51 KLWX 240234
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1033 PM EDT Wed Jul 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-
1033 PM EDT Wed Jul 23 2025

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

High pressure will remain in place across the region through
Thursday. Summertime thunderstorms return to the forecast Friday
through the weekend as a weak front approaches. Small Craft
Advisories may be needed for southerly channeling in the Chesapeake
Bay Thursday evening into Thursday night.

$$

ANZ535-240800-
Tidal Potomac from Key Bridge to Indian Head-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...S winds 5 kt. Waves less than 1 ft.
.THU...S winds around 5 kt. Waves 1 ft.
.THU NIGHT...S winds 5 kt. Waves less than 1 ft.
.FRI...SW winds 5 kt. Waves less than 1 ft.
.FRI NIGHT...NW winds around 5 kt. Waves 1 ft.
.SAT...N winds around 5 kt. Waves 1 ft. A chance of showers and
tstms.
.SAT NIGHT...SE winds around 5 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...W winds around 5 kt. Waves 1 ft. A chance of showers and
tstms through the night.
.MON...N 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-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds around 5 kt. Waves 1 ft.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 kt. Waves less than 1 ft.
.SAT...N winds around 5 kt. Waves 1 ft. A chance of showers and
tstms.
.SAT NIGHT...SE winds around 5 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...W 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.

$$

ANZ537-240800-
Tidal Potomac from Cobb Island to Smith Point-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...SE winds 10 kt. Waves 1 to 2 ft.
.THU...SE winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 kt. Waves 1 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...W winds 5 kt. Waves less than 1 ft.
.SAT...N winds 5 kt. Waves less than 1 ft.
.SAT NIGHT...SE winds 5 kt. Waves less than 1 ft.
.SUN...S winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms through the night.
.MON...N winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$

ANZ530-240800-
Chesapeake Bay north of Pooles Island-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...S winds 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 kt. Waves less than 1 ft.
.SAT...NE winds 5 kt. Waves flat. A chance of showers and tstms.
.SAT NIGHT...SE winds 5 kt. Waves flat. A chance of showers and
tstms.
.SUN...SW winds 5 kt. Waves less than 1 ft. A chance of tstms. A
chance of showers.
.MON...N winds 5 kt. Waves less than 1 ft.

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

$$

ANZ531-240800-
Chesapeake Bay from Pooles Island to Sandy Point-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...S winds 10 to 15 kt. Waves 1 to 2 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...NE winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SAT NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SUN...S winds 5 kt...becoming N after midnight. Waves 1 ft. A
chance of showers.
.MON...NE winds 5 to 10 kt...becoming S. Waves 1 ft or less.

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

$$

ANZ538-240800-
Patapsco River including Baltimore Harbor-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...SW winds 5 kt. Waves less than 1 ft.
.FRI NIGHT...NW winds 5 kt. Waves less than 1 ft.
.SAT...NE winds 5 kt. Waves flat. A chance of showers and tstms.
.SAT NIGHT...SE winds 5 kt. Waves flat. A chance of showers and
tstms.
.SUN...SW winds 5 kt. Waves less than 1 ft. A chance of showers.
.MON...E winds around 5 kt. Waves flat.

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

$$

ANZ539-240800-
Chester River to Queenstown MD-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...SE winds 10 kt. Waves 1 ft.
.THU...S winds 5 kt. Waves less than 1 ft.
.THU NIGHT...S winds 10 kt. Waves 1 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...W winds 5 kt. Waves less than 1 ft.
.SAT...N winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SAT NIGHT...SE winds 5 kt. Waves flat. A chance of showers and
tstms.
.SUN...SW winds 5 kt. Waves less than 1 ft. A chance of showers.
.MON...NE winds 5 kt. Waves less than 1 ft.

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

$$

ANZ532-240800-
Chesapeake Bay from Sandy Point to North Beach-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...S winds 10 to 15 kt. Waves 2 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 to 2 ft.
.FRI NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.SAT...NE winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SAT NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SUN...S winds 5 kt...becoming NW after midnight. Waves 1 ft. A
chance of showers.
.MON...NE winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$

ANZ540-240800-
Eastern Bay-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...SE winds 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 kt. Waves 1 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...W winds 5 kt. Waves less than 1 ft.
.SAT...N winds 5 kt. Waves flat. A chance of showers and tstms.
.SAT NIGHT...SE winds 5 kt. Waves flat. A chance of showers and
tstms.
.SUN...S winds 5 kt. Waves less than 1 ft. A chance of showers.
.MON...N winds 5 to 10 kt...becoming S. Waves 1 ft or less.

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

$$

ANZ533-240800-
Chesapeake Bay from North Beach to Drum Point-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...S winds 10 to 15 kt. Waves 1 to 2 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.SAT...N winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SAT NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SUN...S winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft.
A chance of showers and tstms through the night.
.MON...N winds 5 to 10 kt...becoming S. 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-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...SE winds 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt. Waves 1 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.SAT...N winds 5 kt. Waves less than 1 ft.
.SAT NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SUN...S winds 5 kt...becoming NW after midnight. Waves 1 ft or
less. A chance of showers.
.MON...NE winds 5 to 10 kt...becoming SW after midnight. Waves 1 ft.


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

$$

ANZ542-240800-
Patuxent River to Broomes Island MD-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...W winds 5 kt. Waves less than 1 ft.
.SAT...N winds 5 kt. Waves less than 1 ft.
.SAT NIGHT...SE winds around 5 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...S 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.

$$

ANZ534-240800-
Chesapeake Bay from Drum Point to Smith Point-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...SE winds 10 to 15 kt. Waves 1 to 2 ft.
.THU...SE winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt...becoming SW late. Waves 2 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 to 2 ft.
.FRI NIGHT...S winds 5 to 10 kt...becoming W after midnight. Waves
1 ft.
.SAT...N winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft.
A chance of showers and tstms.
.MON...N winds 5 to 10 kt...becoming E in the evening, then becoming
SW after midnight. Waves 1 ft.

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

$$

ANZ543-240800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1033 PM EDT Wed Jul 23 2025

.REST OF TONIGHT...SE winds 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt...becoming SW late. Waves 1 ft.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.SAT...N winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft.
A chance of showers and tstms.
.MON...N winds 5 to 10 kt...becoming E in the evening, then becoming
S after midnight. Waves 1 ft.

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

$$