792
FZUS51 KLWX 190534
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
134 AM EDT Tue Aug 19 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.

ANZ500-192000-
134 AM EDT Tue Aug 19 2025

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

A stalled frontal boundary will remain near the Virginia/North
Carolina border through tonight. This frontal system meanders nearby
 through mid-week before settling in the vicinity of U.S. 50. This
system eventually moves away to the southeast as a cold front by
Thursday. Weak high pressure returns by late in the week into the
weekend. Small Craft Advisory conditions may linger through this
afternoon for portions of the waters. As Hurricane Erin passes well
to the east, Small Craft Advisories may be needed late Wednesday
into Thursday. Please see National Hurricane Center products for the
 latest information on Erin.

$$

ANZ535-192000-
Tidal Potomac from Key Bridge to Indian Head-
134 AM EDT Tue Aug 19 2025

.OVERNIGHT...NE winds 5 kt. Waves less than 1 ft. A chance of
showers. Vsby 1 to 3 NM.
.TUE...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers. Vsby
1 to 3 NM.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft. Patchy fog. Vsby 1 to
3 NM.
.WED...SE winds around 5 kt. Waves 1 ft. A chance of showers.
.WED NIGHT...E winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms.
.THU...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds around 5 kt. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ536-192000-
Tidal Potomac from Indian Head to Cobb Island-
134 AM EDT Tue Aug 19 2025

.OVERNIGHT...NE winds 10 kt. Waves 1 ft. A chance of showers. Vsby
1 to 3 NM.
.TUE...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers. Patchy
fog. Vsby 1 NM or less.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Patchy fog. Vsby 1 to 3 NM.
.WED...E winds 5 kt. Waves less than 1 ft. A chance of showers.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.THU...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers.
.THU NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.FRI...NE winds 5 to 10 kt...becoming SE. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft.

$$

ANZ537-192000-
Tidal Potomac from Cobb Island to Smith Point-
134 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...

.OVERNIGHT...NE winds 15 kt with gusts to 25 kt. Waves 2 ft. A
chance of showers. Vsby 1 to 3 NM.
.TUE...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance
of showers. Patchy fog. Vsby 1 NM or less.
.TUE NIGHT...E winds 10 to 15 kt. Waves 2 ft. A chance of showers.
Vsby 1 to 3 NM.
.WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED NIGHT...E winds 10 to 15 kt. Gusts up to 25 kt after midnight.
Waves 2 to 3 ft.
.THU...NE winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. A
chance of showers.
.THU NIGHT...N winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.
.FRI...N winds 10 to 15 kt...becoming SE 5 to 10 kt. Waves 1 to
2 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft.

$$

ANZ530-192000-
Chesapeake Bay north of Pooles Island-
134 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT EARLY THIS
MORNING...

.OVERNIGHT...E winds 10 kt. Waves 1 ft. A chance of showers.
.TUE...E winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers and tstms.
.THU...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.THU NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.FRI...NE winds 5 to 10 kt...becoming S. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ531-192000-
Chesapeake Bay from Pooles Island to Sandy Point-
134 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT EARLY THIS
MORNING...

.OVERNIGHT...E winds 10 kt. Waves 1 to 2 ft. A chance of showers.
.TUE...E winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers.
Vsby 1 to 3 NM.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to
2 ft. A chance of showers and tstms.
.THU...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.THU NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...NE winds 5 to 10 kt...becoming SE. Waves 1 to 2 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ538-192000-
Patapsco River including Baltimore Harbor-
134 AM EDT Tue Aug 19 2025

.OVERNIGHT...E winds 10 kt. Waves 1 ft. A chance of showers.
.TUE...E winds 10 kt. Waves 1 ft. A chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.THU...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers.
.THU NIGHT...N winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.FRI...NE winds 5 to 10 kt...becoming S. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft or less.

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

$$

ANZ539-192000-
Chester River to Queenstown MD-
134 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT EARLY THIS
MORNING...

.OVERNIGHT...NE winds 10 kt. Waves 1 ft. A chance of showers.
.TUE...E winds 10 to 15 kt. Waves 1 ft. A chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.THU...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.THU NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.FRI...NE winds 5 to 10 kt...becoming SE. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ532-192000-
Chesapeake Bay from Sandy Point to North Beach-
134 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT EARLY THIS
MORNING...

.OVERNIGHT...NE winds 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers.
.TUE...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance
of showers. Vsby 1 to 3 NM.
.TUE NIGHT...E winds 10 to 15 kt. Waves 1 to 2 ft. A chance of
showers. Vsby 1 to 3 NM.
.WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft. A chance of showers and tstms.
.THU...NE winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft. A
chance of showers.
.THU NIGHT...N winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.FRI...NE winds 10 to 15 kt...becoming SE 5 to 10 kt. Waves 1 to
2 ft.
.SAT...S winds 5 to 10 kt. Waves 1 to 2 ft.

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

$$

ANZ540-192000-
Eastern Bay-
134 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT EARLY THIS
MORNING...

.OVERNIGHT...NE winds 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers.
.TUE...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance
of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers and tstms.
.THU...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers.
.THU NIGHT...N winds 10 to 15 kt with gusts to 25 kt. Waves 1 to
2 ft.
.FRI...NE winds 10 to 15 kt...becoming SE 5 to 10 kt. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ533-192000-
Chesapeake Bay from North Beach to Drum Point-
134 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT EARLY THIS
MORNING...

.OVERNIGHT...NE winds 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers.
.TUE...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance
of showers. Patchy fog. Vsby 1 to 3 NM.
.TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt until early
morning. Waves 2 ft. A chance of showers. Vsby 1 to 3 NM.
.WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.THU...NE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A
chance of showers.
.THU NIGHT...N winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.FRI...N winds 10 to 15 kt...becoming SE 5 to 10 kt. Waves 1 to
2 ft.
.SAT...S winds 5 to 10 kt. Waves 1 to 2 ft.

$$

ANZ541-192000-
Choptank River to Cambridge MD and the Little Choptank River-
134 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT EARLY THIS
MORNING...

.OVERNIGHT...NE winds 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers.
.TUE...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance
of showers. Vsby 1 to 3 NM.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.THU...NE winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A
chance of showers.
.THU NIGHT...N winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.FRI...N winds 10 to 15 kt...becoming SE 5 to 10 kt. Waves 1 to
2 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ542-192000-
Patuxent River to Broomes Island MD-
134 AM EDT Tue Aug 19 2025

.OVERNIGHT...NE winds 10 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers.
.TUE...E winds 10 kt. Waves 1 ft. A chance of showers. Patchy fog.
Vsby 1 to 3 NM.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED NIGHT...E winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.THU...NE winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. A
chance of showers.
.THU NIGHT...N winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
.FRI...NE winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft.

$$

ANZ534-192000-
Chesapeake Bay from Drum Point to Smith Point-
134 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...

.OVERNIGHT...NE winds 15 kt with gusts to 25 kt. Waves 2 ft. Showers
likely. Vsby 1 to 3 NM.
.TUE...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers
likely. Patchy fog. Vsby 1 to 3 NM.
.TUE NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers. Vsby 1 to 3 NM.
.WED...SE winds 10 kt. Waves 1 to 2 ft. A chance of showers.
.WED NIGHT...E winds 15 to 20 kt. Gusts up to 25 kt after midnight.
Waves 2 to 3 ft.
.THU...NE winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. A
chance of showers.
.THU NIGHT...N winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.
.FRI...N winds 15 to 20 kt...becoming SE 5 to 10 kt. Waves 2 to
3 ft...subsiding to 1 ft after midnight.
.SAT...S winds 5 to 10 kt. Waves 1 to 2 ft.

$$

ANZ543-192000-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
134 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...

.OVERNIGHT...NE winds 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers. Patchy fog. Vsby 1 to 3 NM.
.TUE...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance
of showers. Patchy fog. Vsby 1 to 3 NM.
.TUE NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers.
.WED...E winds 10 kt. Waves 1 ft. A chance of showers.
.WED NIGHT...NE winds 15 to 20 kt. Gusts up to 25 kt after midnight.
Waves 1 to 2 ft. A chance of showers.
.THU...NE winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. A
chance of showers.
.THU NIGHT...N winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
.FRI...N winds 15 to 20 kt...becoming NE 10 kt in the afternoon and
evening, then becoming SE after midnight. Waves 1 to 2 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft.

$$