348
FZUS51 KLWX 220535
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
135 AM EDT Thu May 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.

ANZ500-222000-
135 AM EDT Thu May 22 2025

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

Low pressure will move up the coast toward New England through
Friday. High pressure will begin to build in from the west over the
weekend, but a frontal system will approach from the southwest early
 next week. Small Craft Advisories may be needed at times Friday
into   Saturday.

$$

ANZ535-222000-
Tidal Potomac from Key Bridge to Indian Head-
135 AM EDT Thu May 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH THIS
EVENING...

.OVERNIGHT...NE winds around 5 kt. Waves 1 ft. A chance of showers.
Patchy fog. Vsby 1 to 3 NM.
.THU...W winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves
1 ft. Showers.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.FRI NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Waves 1 ft.
.SAT...NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Waves 1 ft.
.SUN...NW winds 5 to 10 kt...becoming light. Waves 1 ft.
.MON...E winds around 5 kt. Waves 1 ft. A chance of showers in the
afternoon. Showers likely through the night.

$$

ANZ536-222000-
Tidal Potomac from Indian Head to Cobb Island-
135 AM EDT Thu May 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH THIS
EVENING...

.OVERNIGHT...N winds 5 kt. Waves less than 1 ft. A chance of
showers. Patchy fog. Vsby 1 to 3 NM.
.THU...W winds 5 to 10 kt. Gusts up to 20 kt in the late morning and
afternoon. Waves 1 ft. Showers likely.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI...W winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SUN...NW winds around 5 kt. Waves 1 ft. A chance of showers after
midnight.
.MON...E winds around 5 kt. Waves 1 ft. A chance of showers through
the day, then showers likely through the night.

$$

ANZ537-222000-
Tidal Potomac from Cobb Island to Smith Point-
135 AM EDT Thu May 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM EDT THIS MORNING
THROUGH LATE TONIGHT...

.OVERNIGHT...NE winds 10 kt...becoming NW late. Waves 1 to 2 ft. A
chance of showers. Patchy fog. Vsby 1 to 3 NM.
.THU...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
Showers likely with a chance of tstms.
.THU NIGHT...W winds 5 to 10 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers and tstms.
.FRI...W winds 10 kt. Waves 2 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 to 2 ft.
.SAT...NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 to 2 ft.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers after
midnight.
.MON...NE winds 5 to 10 kt...becoming SE. Waves 1 ft. A chance of
showers, then showers likely after midnight.

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

$$

ANZ530-222000-
Chesapeake Bay north of Pooles Island-
135 AM EDT Thu May 22 2025

.OVERNIGHT...E winds 10 kt. Waves 1 ft. Showers likely with a slight
chance of tstms. Patchy fog. Vsby 1 NM or less.
.THU...NE winds 5 kt. Waves less than 1 ft. Showers.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. Showers likely.
.FRI...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.FRI NIGHT...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.SAT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Waves 1 ft.
.SUN...NW winds 5 to 10 kt. Waves 1 ft.
.MON...NE winds around 5 kt. Waves 1 ft. A chance of showers.

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

$$

ANZ531-222000-
Chesapeake Bay from Pooles Island to Sandy Point-
135 AM EDT Thu May 22 2025

.OVERNIGHT...E winds 10 kt. Waves 1 to 2 ft. Showers likely. Patchy
fog. Vsby 1 to 3 NM.
.THU...N winds 5 to 10 kt. Waves 1 ft. Showers.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 to 2 ft. A chance of
showers.
.FRI...W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.SAT...W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the evening.
Waves 1 to 2 ft.
.SUN...NW winds 5 to 10 kt. Waves 1 ft or less.
.MON...E winds 5 kt. Waves less than 1 ft. A chance of showers
through the night. Showers likely after midnight.

$$

ANZ538-222000-
Patapsco River including Baltimore Harbor-
135 AM EDT Thu May 22 2025

.OVERNIGHT...E winds 5 to 10 kt. Waves 1 ft. Showers likely. Patchy
fog. Vsby 1 to 3 NM.
.THU...N winds 5 kt...becoming NW late. Waves 1 ft. Showers.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.FRI NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SAT...W winds 10 kt with gusts to 20 kt. Waves 1 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.SUN...NW winds 5 to 10 kt...becoming light. Waves 1 ft or less.
.MON...E winds around 5 kt. Waves 1 ft or less. A chance of showers
through the night. Showers likely after midnight.

$$

ANZ539-222000-
Chester River to Queenstown MD-
135 AM EDT Thu May 22 2025

.OVERNIGHT...E winds 5 to 10 kt. Waves 1 ft. Showers likely with a
slight chance of tstms. Patchy fog. Vsby 1 to 3 NM.
.THU...N winds 5 to 10 kt. Waves 1 ft. Showers.
.THU NIGHT...W winds 5 to 10 kt. Waves 2 ft. A chance of showers.
.FRI...W winds 10 kt with gusts to 20 kt. Waves 2 ft.
.FRI NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...W winds 10 kt with gusts to 20 kt. Waves 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 to 2 ft.
.SUN...NW winds 5 to 10 kt. Waves 1 ft or less.
.MON...E winds around 5 kt. Waves flat. A chance of showers through
the night. Showers likely after midnight.

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

$$

ANZ532-222000-
Chesapeake Bay from Sandy Point to North Beach-
135 AM EDT Thu May 22 2025

.OVERNIGHT...E winds 5 to 10 kt. Waves 1 to 2 ft. A chance of
showers with a slight chance of tstms. Patchy fog. Vsby 1 to 3 NM.
.THU...NW winds 5 to 10 kt. Waves 1 ft. Showers.
.THU NIGHT...W winds 10 kt. Waves 2 ft. A chance of showers.
.FRI...W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.SAT...W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT NIGHT...NW winds 10 to 15 kt. Waves 1 to 2 ft.
.SUN...NW winds 5 to 10 kt. Waves 1 ft or less.
.MON...E winds 5 kt...becoming SE after midnight. Waves 1 ft. A
chance of showers through the night. Showers likely after midnight.

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

$$

ANZ540-222000-
Eastern Bay-
135 AM EDT Thu May 22 2025

.OVERNIGHT...E winds 5 kt. Waves less than 1 ft. Showers likely with
a slight chance of tstms. Patchy fog. Vsby 1 to 3 NM.
.THU...NW winds 5 to 10 kt. Waves 1 ft. Showers.
.THU NIGHT...W winds 10 kt. Waves 1 to 2 ft. A chance of showers.
.FRI...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.FRI NIGHT...W winds 10 to 15 kt. Waves 1 ft.
.SAT...W winds 10 kt with gusts to 20 kt. Waves 1 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SUN...NW winds 5 to 10 kt. Waves 1 ft or less.
.MON...E winds 5 kt. Waves less than 1 ft. A chance of showers
through the night. Showers likely after midnight.

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

$$

ANZ533-222000-
Chesapeake Bay from North Beach to Drum Point-
135 AM EDT Thu May 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM EDT THIS MORNING
THROUGH LATE TONIGHT...

.OVERNIGHT...NE winds 5 to 10 kt. Waves 1 to 2 ft. A chance of
showers with a slight chance of tstms. Patchy fog. Vsby 1 to 3 NM.
.THU...NW winds 5 to 10 kt. Gusts up to 20 kt in the late morning
and afternoon. Waves 1 to 2 ft. Showers likely.
.THU NIGHT...W winds 10 kt with gusts to 20 kt. Waves 2 ft. A chance
of showers.
.FRI...W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT NIGHT...NW winds 10 to 15 kt. Waves 1 to 2 ft.
.SUN...NW winds 5 to 10 kt. Waves 1 ft.
.MON...NE winds 5 kt...becoming SE. Waves 1 ft. A chance of showers
through the night. Showers likely after midnight.

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

$$

ANZ541-222000-
Choptank River to Cambridge MD and the Little Choptank River-
135 AM EDT Thu May 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM EDT THIS MORNING
THROUGH LATE TONIGHT...

.OVERNIGHT...NE winds 5 kt. Waves less than 1 ft. Showers likely
with a slight chance of tstms. Patchy fog. Vsby 1 to 3 NM.
.THU...NW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.THU NIGHT...W winds 10 kt with gusts to 20 kt. Waves 2 ft. A chance
of showers.
.FRI...W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI NIGHT...NW winds 10 to 15 kt. Waves 2 ft.
.SAT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 to 2 ft.
.SUN...NW winds 5 to 10 kt. Waves 1 ft.
.MON...E winds 5 kt...becoming SE after midnight. Waves 1 ft. A
chance of showers through the night. Showers likely after midnight.

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

$$

ANZ542-222000-
Patuxent River to Broomes Island MD-
135 AM EDT Thu May 22 2025

.OVERNIGHT...NE winds 5 kt. Waves less than 1 ft. A chance of
showers. Patchy fog. Vsby 1 to 3 NM.
.THU...W winds 5 to 10 kt. Waves 1 ft. Showers likely.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI...W winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SUN...NW winds around 5 kt. Waves 1 ft. A chance of showers after
midnight.
.MON...E winds 5 kt. Waves less than 1 ft. A chance of showers, then
showers likely after midnight.

$$

ANZ534-222000-
Chesapeake Bay from Drum Point to Smith Point-
135 AM EDT Thu May 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM EDT THIS MORNING
THROUGH LATE TONIGHT...

.OVERNIGHT...E winds 10 kt...becoming NW late. Waves 1 to 2 ft. A
chance of showers. Patchy fog. Vsby 1 to 3 NM.
.THU...W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers
likely with a chance of tstms.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 to
3 ft. A chance of showers and tstms.
.FRI...W winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft.
.FRI NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT NIGHT...NW winds 10 to 15 kt. Waves 2 ft.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers after
midnight.
.MON...E winds 5 to 10 kt...becoming SE. Waves 1 ft. A chance of
showers, then showers likely after midnight.

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

$$

ANZ543-222000-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
135 AM EDT Thu May 22 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM EDT THIS MORNING
THROUGH LATE TONIGHT...

.OVERNIGHT...E winds 10 kt...becoming N late. Waves 1 ft. A chance
of showers. Patchy fog. Vsby 1 to 3 NM.
.THU...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Showers
likely with a chance of tstms.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers and tstms.
.FRI...W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT NIGHT...NW winds 10 to 15 kt. Waves 1 ft.
.SUN...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers after
midnight.
.MON...NE winds 5 kt...becoming SE. Waves 1 ft. A chance of showers,
then showers likely after midnight.

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

$$