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FZUS51 KLWX 040012
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
812 PM EDT Thu Apr 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.

ANZ500-040815-
812 PM EDT Thu Apr 3 2025

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

A cold front to the west will track through overnight before
stalling nearby into Friday. Eventually this system lifts northward
as a warm front on Saturday, while another area of low pressure and
the accompanying cold front move through on Sunday. A secondary
reinforcing cold front tracks through the waters early next week.
Small Craft Advisories may be needed Saturday night through the
remainder of the weekend.  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.

$$

ANZ535-040815-
Tidal Potomac from Key Bridge to Indian Head-
812 PM EDT Thu Apr 3 2025

.TONIGHT...SW winds 10 kt. Waves 1 ft. Isolated showers.
.FRI...N winds 5 to 10 kt...becoming NE late. Waves 1 ft. A chance
of showers.
.FRI NIGHT...E winds around 5 kt. Waves 1 ft. A chance of showers.
.SAT...SE winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...S winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.SUN...SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. Showers
likely.
.SUN NIGHT...NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Showers with a chance of tstms.
.MON...N winds 5 to 10 kt. Waves 1 ft. Showers likely, mainly in the
morning.
.TUE...NW winds 10 to 15 kt...diminishing to 5 kt after midnight.
Waves 1 ft.

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

$$

ANZ536-040815-
Tidal Potomac from Indian Head to Cobb Island-
812 PM EDT Thu Apr 3 2025

.TONIGHT...SW winds 10 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt...becoming NE in the afternoon. Waves
1 ft. A chance of showers.
.FRI NIGHT...E winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms. Vsby 1 NM or less.
.SAT...SE winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...S winds 15 to 20 kt. Waves 1 to 2 ft.
.SUN...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. Showers
likely.
.SUN NIGHT...SW winds 10 to 15 kt...becoming NW after midnight.
Gusts up to 20 kt. Waves 1 ft. Showers with a chance of tstms.
.MON...N winds 10 to 15 kt...diminishing to 5 to 10 kt. Waves 1 ft.
Showers, mainly in the morning.
.TUE...NW winds 10 to 15 kt. Waves 1 to 2 ft.

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

$$

ANZ537-040815-
Tidal Potomac from Cobb Island to Smith Point-
812 PM EDT Thu Apr 3 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT FRIDAY...

.TONIGHT...SW winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI...W winds 5 to 10 kt...becoming N in the afternoon. Waves 1 ft.
A chance of showers.
.FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.SAT...SE winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...S winds 15 to 20 kt. Waves 1 to 2 ft.
.SUN...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A
chance of showers.
.SUN NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Showers with a chance of tstms.
.MON...N winds 10 to 15 kt...diminishing to 5 to 10 kt. Waves 1 to
2 ft. Showers, mainly in the morning.
.TUE...NW winds 10 to 15 kt. Waves 2 ft.

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

$$

ANZ530-040815-
Chesapeake Bay north of Pooles Island-
812 PM EDT Thu Apr 3 2025

.TONIGHT...SW winds 10 kt. Waves 1 ft. Scattered showers early this
evening, then scattered showers with isolated tstms after midnight.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...NE winds around 5 kt. Waves 1 ft. Showers.
.SAT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...SE winds 10 to 15 kt. Waves 1 ft. A chance of showers.
.SUN...SW winds 10 to 15 kt...becoming W in the afternoon. Gusts up
to 20 kt. Waves 2 ft. A chance of showers.
.SUN NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Showers.
.MON...NW winds 5 to 10 kt. Waves 1 ft. Showers likely in the
morning.
.TUE...NW winds 10 to 15 kt. Waves 1 to 2 ft.

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

$$

ANZ531-040815-
Chesapeake Bay from Pooles Island to Sandy Point-
812 PM EDT Thu Apr 3 2025

.TONIGHT...SW winds 10 kt. Waves 1 to 2 ft. Isolated showers early
this evening, then scattered showers after midnight.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...NE winds 5 to 10 kt. Waves 1 ft. Showers.
.SAT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to
2 ft.
.SUN...SW winds 10 to 15 kt...becoming W in the afternoon. Gusts up
to 20 kt. Waves 2 ft. A chance of showers.
.SUN NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Showers.
.MON...N winds 10 to 15 kt...becoming NW 5 to 10 kt. Waves 1 to
2 ft. A chance of showers through the day.
.TUE...NW winds 15 to 20 kt. Waves 2 to 3 ft.

$$

ANZ538-040815-
Patapsco River including Baltimore Harbor-
812 PM EDT Thu Apr 3 2025

.TONIGHT...SW winds 10 kt. Waves 1 ft. Isolated showers early this
evening, then scattered showers after midnight.
.FRI...N winds 5 kt. Waves less than 1 ft. A chance of showers.
.FRI NIGHT...NE winds around 5 kt. Waves flat. Showers.
.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.
.SUN...SW winds 10 to 15 kt...becoming W in the afternoon. Gusts up
to 20 kt. Waves 1 ft. Showers likely.
.SUN NIGHT...N winds 10 kt. Waves 1 ft. Showers.
.MON...NW winds 5 to 10 kt. Waves 1 ft. Showers likely in the
morning.
.TUE...NW winds 10 to 15 kt. Waves 1 ft.

$$

ANZ539-040815-
Chester River to Queenstown MD-
812 PM EDT Thu Apr 3 2025

.TONIGHT...SW winds 10 kt. Waves 1 ft. Isolated showers early this
evening, then scattered showers after midnight.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...NE winds 5 kt. Waves less than 1 ft. Showers.
.SAT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to
2 ft.
.SUN...SW winds 15 kt with gusts to 20 kt. Waves 2 ft. A chance of
showers.
.SUN NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Showers.
.MON...N winds 10 to 15 kt...becoming NW 5 to 10 kt. Waves 1 ft.
Showers, mainly in the morning.
.TUE...NW winds 10 to 15 kt. Waves 2 to 3 ft.

$$

ANZ532-040815-
Chesapeake Bay from Sandy Point to North Beach-
812 PM EDT Thu Apr 3 2025

.TONIGHT...SW winds 10 to 15 kt. Waves 2 ft. Isolated showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...NE winds 5 to 10 kt. Waves 1 ft. Showers likely. Vsby
1 NM or less.
.SAT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN...SW winds 15 to 20 kt. Waves 2 to 3 ft. A chance of showers.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Showers.
.MON...N winds 10 to 15 kt...becoming NW after midnight. Waves 1 to
2 ft. Showers, mainly in the morning.
.TUE...NW winds 15 to 20 kt. Waves 2 ft.

$$

ANZ540-040815-
Eastern Bay-
812 PM EDT Thu Apr 3 2025

.TONIGHT...SW winds 10 to 15 kt. Waves 1 ft. Isolated showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI NIGHT...NE winds 5 to 10 kt. Waves 1 ft. Showers. Vsby 1 NM or
less.
.SAT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.SUN...SW winds 15 kt with gusts to 20 kt. Waves 2 ft. A chance of
showers.
.SUN NIGHT...NW winds 10 to 15 kt...becoming N after midnight. Gusts
up to 20 kt. Waves 1 to 2 ft. Showers.
.MON...N winds 10 to 15 kt...becoming NW 5 to 10 kt after midnight.
Waves 1 ft. Showers, mainly in the morning.
.TUE...NW winds 10 to 15 kt. Waves 2 ft.

$$

ANZ533-040815-
Chesapeake Bay from North Beach to Drum Point-
812 PM EDT Thu Apr 3 2025

.TONIGHT...SW winds 15 kt. Waves 2 ft.
.FRI...NW winds 5 to 10 kt...becoming N in the afternoon. Waves
1 ft.
.FRI NIGHT...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers
and tstms. Vsby 1 NM or less.
.SAT...SE winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...S winds 15 to 20 kt. Waves 2 ft.
.SUN...SW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A
chance of showers.
.SUN NIGHT...W winds 10 to 15 kt...becoming NW after midnight. Gusts
up to 20 kt. Waves 2 ft. Showers.
.MON...N winds 10 to 15 kt...becoming NW after midnight. Waves 1 to
2 ft. Showers, mainly in the morning.
.TUE...NW winds 15 to 20 kt. Waves 2 to 3 ft.

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

$$

ANZ541-040815-
Choptank River to Cambridge MD and the Little Choptank River-
812 PM EDT Thu Apr 3 2025

.TONIGHT...SW winds 15 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt...becoming N in the afternoon. Waves
1 ft. A chance of showers.
.FRI NIGHT...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Vsby 1 NM or less.
.SAT...SE winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...S winds 15 to 20 kt. Waves 1 to 2 ft.
.SUN...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A
chance of showers.
.SUN NIGHT...W winds 10 to 15 kt...becoming NW after midnight. Gusts
up to 20 kt. Waves 2 ft. Showers.
.MON...N winds 10 to 15 kt...becoming NW after midnight. Waves 1 to
2 ft. Showers, mainly in the morning.
.TUE...NW winds 15 to 20 kt. Waves 2 ft.

$$

ANZ542-040815-
Patuxent River to Broomes Island MD-
812 PM EDT Thu Apr 3 2025

.TONIGHT...SW winds 10 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt...becoming N in the afternoon. Waves 1 ft.
A chance of showers.
.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.
.SAT NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN...SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. A
chance of showers.
.SUN NIGHT...W winds 10 to 15 kt...becoming NW after midnight. Gusts
up to 20 kt. Waves 1 ft. Showers with a chance of tstms.
.MON...N winds 5 to 10 kt. Waves 1 ft. Showers, mainly in the
morning.
.TUE...NW winds 10 to 15 kt. Waves 1 ft.

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

$$

ANZ534-040815-
Chesapeake Bay from Drum Point to Smith Point-
812 PM EDT Thu Apr 3 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT FRIDAY...

.TONIGHT...SW winds 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...SW winds 10 to 15 kt...becoming N in the afternoon. Waves
1 to 2 ft.
.FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.SAT...SE winds 10 kt. Waves 1 ft.
.SAT NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 to
3 ft.
.SUN...SW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A
chance of showers.
.SUN NIGHT...W winds 15 kt with gusts to 20 kt. Waves 2 to 3 ft.
Showers with a chance of tstms.
.MON...N winds 10 to 15 kt. Waves 1 to 2 ft. Showers through the
day. A chance of showers through the night.
.TUE...NW winds 15 to 20 kt. Waves 3 ft.

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

$$

ANZ543-040815-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
812 PM EDT Thu Apr 3 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT FRIDAY...

.TONIGHT...S winds 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...SW winds 10 to 15 kt with gusts to 20 kt... becoming N 5 to
10 kt in the afternoon. Waves 1 to 2 ft.
.FRI NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.SAT...SE winds 10 kt. Waves 1 ft.
.SAT NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.SUN...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A
chance of showers.
.SUN NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Showers with a chance of tstms.
.MON...N winds 10 to 15 kt. Waves 1 to 2 ft. Showers through the
day. A chance of showers through the night.
.TUE...NW winds 15 to 20 kt. Waves 2 ft. A chance of showers in the
morning.

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

$$