434
FZUS51 KLWX 221734
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
134 PM EDT Tue Apr 22 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.

ANZ500-230800-
134 PM EDT Tue Apr 22 2025

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

A cold front will slowly drift south of the area through tonight.
Weak high pressure builds in for the middle of the week before this
front lifts northward across the area as a warm front on Friday.
Small Craft Advisories may be needed late Friday into Saturday.
Boaters should be aware of the threats of boating in cold water,
even when air temperatures are warm. Visit
weather.gov/safety/coldwater for more information.

$$

ANZ535-230800-
Tidal Potomac from Key Bridge to Indian Head-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...NW winds 5 to 10 kt. Waves 1 ft.
.TONIGHT...N winds around 5 kt. Waves 1 ft.
.WED...NE winds around 5 kt. Waves 1 ft.
.WED NIGHT...S winds around 5 kt. Waves 1 ft or less.
.THU...SE winds around 5 kt. Waves 1 ft.
.THU NIGHT...SE winds around 5 kt. Waves 1 ft.
.FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT...SW winds 5 to 10 kt...becoming NW. Waves 1 ft. Showers
likely. A chance of tstms through the night, then a chance of
showers after midnight.

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

$$

ANZ536-230800-
Tidal Potomac from Indian Head to Cobb Island-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...N winds around 5 kt. Waves 1 ft.
.WED...NE winds 5 kt. Waves less than 1 ft.
.WED NIGHT...SE winds around 5 kt. Waves 1 ft.
.THU...SE winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.FRI...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT...SW winds 5 to 10 kt...becoming N after midnight. Waves 1 ft.
Showers likely. A chance of tstms through the night, then a chance
of showers after midnight.

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

$$

ANZ537-230800-
Tidal Potomac from Cobb Island to Smith Point-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...N winds 5 kt. Waves flat. A slight chance of
showers.
.TONIGHT...NE winds around 5 kt. Waves flat.
.WED...NE winds 5 kt. Waves less than 1 ft.
.WED NIGHT...SE winds around 5 kt. Waves flat.
.THU...SE winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.FRI...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT...SW winds 10 kt...becoming N after midnight. Waves 1 ft. A
chance of showers in the morning, then showers likely through the
night. A chance of showers after midnight.

$$

ANZ530-230800-
Chesapeake Bay north of Pooles Island-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...W winds 10 kt. Waves 1 ft.
.TONIGHT...NW winds around 5 kt. Waves 1 ft.
.WED...E winds around 5 kt. Waves 1 ft.
.WED NIGHT...Light winds. Waves 1 ft or less.
.THU...SE winds around 5 kt. Waves 1 ft.
.THU NIGHT...S winds around 5 kt. Waves 1 ft.
.FRI...S winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the night. Showers likely after midnight.
.SAT...SW winds 5 to 10 kt...becoming NW. Waves 1 ft. Showers
likely. A chance of showers after midnight.

$$

ANZ531-230800-
Chesapeake Bay from Pooles Island to Sandy Point-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...NW winds 10 kt. Waves 1 ft.
.TONIGHT...N winds 5 kt. Waves less than 1 ft.
.WED...NE winds around 5 kt. Waves flat.
.WED NIGHT...S winds around 5 kt. Waves flat.
.THU...SE winds around 5 kt. Waves 1 ft or less.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the night. Showers likely after midnight.
.SAT...SW winds 10 kt...becoming NW. Waves 1 ft. Showers likely. A
chance of showers after midnight.

$$

ANZ538-230800-
Patapsco River including Baltimore Harbor-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...W winds 10 kt. Waves 1 ft.
.TONIGHT...NW winds 5 kt. Waves flat.
.WED...E winds 5 kt. Waves flat.
.WED NIGHT...S winds around 5 kt. Waves flat.
.THU...SE winds around 5 kt. Waves 1 ft or less.
.THU NIGHT...S winds around 5 kt. Waves 1 ft or less.
.FRI...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the night. Showers likely after midnight.
.SAT...SW winds 5 to 10 kt...becoming NW. Waves 1 ft. Showers
likely. A chance of showers after midnight.

$$

ANZ539-230800-
Chester River to Queenstown MD-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...NW winds 10 kt. Waves 1 ft.
.TONIGHT...N winds around 5 kt. Waves 1 ft or less.
.WED...N winds around 5 kt. Waves flat.
.WED NIGHT...S winds around 5 kt. Waves flat.
.THU...S winds around 5 kt. Waves 1 ft or less.
.THU NIGHT...S winds around 5 kt. Waves 1 ft or less.
.FRI...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the night. Showers likely after midnight.
.SAT...SW winds 10 kt...becoming NW. Waves 1 ft. Showers likely. A
chance of showers after midnight.

$$

ANZ532-230800-
Chesapeake Bay from Sandy Point to North Beach-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...NW winds 10 kt. Waves 1 ft.
.TONIGHT...N winds around 5 kt. Waves flat.
.WED...NE winds 5 kt. Waves less than 1 ft.
.WED NIGHT...S winds around 5 kt. Waves flat.
.THU...SE winds around 5 kt. Waves 1 ft or less.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers
through the night. Showers likely after midnight.
.SAT...SW winds 10 kt...becoming NW. Waves 1 to 2 ft. Showers
likely. A chance of showers after midnight.

$$

ANZ540-230800-
Eastern Bay-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...NW winds 10 kt. Waves 1 ft.
.TONIGHT...N winds 5 kt. Waves flat.
.WED...N winds around 5 kt. Waves 1 ft or less.
.WED NIGHT...S winds around 5 kt. Waves flat.
.THU...SE winds around 5 kt. Waves 1 ft or less.
.THU NIGHT...S winds 5 kt. Waves less than 1 ft.
.FRI...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the night. Showers likely after midnight.
.SAT...SW winds 10 kt...becoming NW. Waves 1 ft. Showers likely. A
chance of showers after midnight.

$$

ANZ533-230800-
Chesapeake Bay from North Beach to Drum Point-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...N winds around 5 kt. Waves 1 ft or less.
.WED...NE winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds around 5 kt. Waves flat.
.THU...SE winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.FRI...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers.
.SAT...SW winds 10 kt...becoming NW. Waves 1 to 2 ft. Showers
likely. A chance of showers after midnight.

$$

ANZ541-230800-
Choptank River to Cambridge MD and the Little Choptank River-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...NW winds 5 to 10 kt. Waves 1 ft.
.TONIGHT...N winds around 5 kt. Waves 1 ft or less.
.WED...N winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds around 5 kt. Waves flat.
.THU...SE winds around 5 kt. Waves 1 ft or less.
.THU NIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.FRI...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers.
.SAT...SW winds 10 kt...becoming NW. Waves 1 ft. Showers likely. A
chance of showers after midnight.

$$

ANZ542-230800-
Patuxent River to Broomes Island MD-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...N winds around 5 kt. Waves 1 ft.
.WED...NE winds 5 kt. Waves less than 1 ft.
.WED NIGHT...SE winds around 5 kt. Waves 1 ft.
.THU...SE winds around 5 kt. Waves 1 ft.
.THU NIGHT...SE winds around 5 kt. Waves 1 ft.
.FRI...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT...SW winds 5 to 10 kt...becoming N after midnight. Waves 1 ft.
Showers likely. A chance of showers after midnight.

$$

ANZ534-230800-
Chesapeake Bay from Drum Point to Smith Point-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...NE winds 5 kt. Waves less than 1 ft. A slight
chance of showers.
.TONIGHT...NE winds around 5 kt. Waves 1 ft.
.WED...NE winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...SE winds around 5 kt. Waves 1 ft or less.
.THU...SE winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.FRI...SE winds 10 to 15 kt...becoming S after midnight. Waves 1 to
2 ft. A chance of showers.
.SAT...S winds 10 to 15 kt...becoming W in the evening, then
becoming N after midnight. Waves 2 ft. A chance of showers in the
morning, then showers likely through the night. A chance of showers
after midnight.

$$

ANZ543-230800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
134 PM EDT Tue Apr 22 2025

.THIS AFTERNOON...W winds 5 kt. Waves less than 1 ft.
.TONIGHT...N winds around 5 kt. Waves flat.
.WED...NE winds 5 to 10 kt...becoming SE late. Waves 1 ft.
.WED NIGHT...SE winds around 5 kt. Waves flat.
.THU...SE winds around 5 kt. Waves 1 ft or less.
.THU NIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.FRI...SE winds 10 to 15 kt. Waves 1 ft. A chance of showers.
.SAT...SW winds 10 to 15 kt...becoming N after midnight. Waves 1 ft.
A chance of showers in the morning, then showers likely through the
night. A chance of showers after midnight.

$$