736
FZUS51 KLWX 120902
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
502 AM EDT Mon May 12 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.

ANZ500-122100-
502 AM EDT Mon May 12 2025

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

High pressure will move offshore from New England today. Low
pressure will slowly approach from the southwest Tuesday into
Wednesday, eventually moving east of the area by Thursday night.
Small Craft Advisories will likely be needed for portions of the
waters Tuesday night.

$$

ANZ535-122100-
Tidal Potomac from Key Bridge to Indian Head-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...SE winds 5 kt...increasing to 10 kt this afternoon. Waves
1 ft. A chance of showers this afternoon.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft. Showers.
.TUE...SE winds 5 to 10 kt. Gusts up to 20 kt... increasing to 25 kt
late. Waves 1 ft. Showers. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Showers with a chance of tstms.
.WED...SE winds 5 kt. Waves less than 1 ft. Showers with a chance of
tstms.
.WED NIGHT...E winds around 5 kt. Waves 1 ft. Showers likely.
.THU...S winds around 5 kt. Waves 1 ft or less. A chance of showers.
.FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.

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

$$

ANZ536-122100-
Tidal Potomac from Indian Head to Cobb Island-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers this
afternoon.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft. Showers. Vsby 1 to 3 NM.
.TUE...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
Showers with a chance of tstms. Vsby 1 NM or less.
.TUE NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft. Showers with a chance of tstms.
.WED...SE winds 5 kt. Waves less than 1 ft. Showers with a chance of
tstms.
.WED NIGHT...SE winds around 5 kt. Waves 1 ft. Showers likely.
.THU...S winds around 5 kt. Waves 1 ft. A chance of showers.
.FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.

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

$$

ANZ537-122100-
Tidal Potomac from Cobb Island to Smith Point-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...SE winds 5 to 10 kt. Waves 1 ft or less... building to 2 ft
late. A chance of showers this afternoon.
.TONIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Showers likely.
.TUE...SE winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.
Showers. Vsby 1 NM or less.
.TUE NIGHT...SE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
Showers with a chance of tstms.
.WED...SE winds 5 to 10 kt. Waves 1 to 2 ft. Showers likely with a
chance of tstms.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...S winds around 5 kt. Waves 1 ft or less. A chance of showers.
.FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
afternoon. A chance of showers and tstms through the night.

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

$$

ANZ530-122100-
Chesapeake Bay north of Pooles Island-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...E winds 5 kt...becoming S this afternoon. Waves 1 ft.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Showers likely.
.TUE...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Showers. Vsby 1 NM or less.
.TUE NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Showers.
.WED...E winds 10 to 15 kt. Waves 1 ft. Showers.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft. Showers likely.
.THU...SE winds around 5 kt. Waves 1 ft or less. A chance of
showers.
.FRI...SW winds around 5 kt. Waves 1 ft. A chance of showers. A
chance of tstms through the night.

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

$$

ANZ531-122100-
Chesapeake Bay from Pooles Island to Sandy Point-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...E winds 5 kt...becoming S this afternoon. Waves 1 to 2 ft.
A slight chance of showers this afternoon.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 to 2 ft. Showers likely.
.TUE...SE winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to 2 ft.
Showers. Vsby 1 NM or less.
.TUE NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Showers.
.WED...E winds 5 to 10 kt. Waves 1 to 2 ft. Showers with a chance of
tstms.
.WED NIGHT...E winds 5 to 10 kt. Waves 1 ft or less. Showers likely.
.THU...SE winds around 5 kt. Waves flat. A chance of showers.
.FRI...SW winds around 5 kt. Waves 1 ft or less. A chance of
showers. A chance of tstms through the night.

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

$$

ANZ538-122100-
Patapsco River including Baltimore Harbor-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...E winds 5 kt...becoming SE this afternoon. Waves 1 ft or
less. A slight chance of showers this afternoon.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft. Showers likely.
.TUE...SE winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to 2 ft.
Showers. Vsby 1 to 3 NM.
.TUE NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft. Showers.
.WED...E winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.WED NIGHT...E winds around 5 kt. Waves 1 ft or less. Showers
likely.
.THU...SE winds around 5 kt. Waves flat. A chance of showers.
.FRI...SW winds around 5 kt. Waves 1 ft or less. A chance of
showers. A chance of tstms through the night.

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

$$

ANZ539-122100-
Chester River to Queenstown MD-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...SE winds 5 kt...becoming S this afternoon. Waves 1 ft or
less. A slight chance of showers this afternoon.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft. Showers likely.
.TUE...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Showers. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Showers with a chance of tstms.
.WED...E winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.WED NIGHT...E winds 5 kt. Waves less than 1 ft. Showers likely.
.THU...S winds 5 kt. Waves flat. A chance of showers.
.FRI...SW winds 5 kt. Waves less than 1 ft. A chance of showers. A
chance of tstms through the night.

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

$$

ANZ532-122100-
Chesapeake Bay from Sandy Point to North Beach-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...SE winds 5 kt...becoming S this afternoon. Waves 1 to 2 ft.
A chance of showers this afternoon.
.TONIGHT...SE winds 10 kt. Waves 2 ft. Showers likely.
.TUE...SE winds 10 to 15 kt with gusts to 25 kt. Waves 2 to 3 ft.
Showers. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
Showers with a chance of tstms.
.WED...SE winds 5 to 10 kt. Waves 1 to 2 ft. Showers with a chance
of tstms.
.WED NIGHT...SE winds 5 to 10 kt. Waves 1 ft. Showers likely.
.THU...S winds around 5 kt. Waves 1 ft or less. A chance of showers.
.FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. A
chance of tstms through the night.

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

$$

ANZ540-122100-
Eastern Bay-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...SE winds 5 kt...becoming S this afternoon. Waves 1 ft or
less. A slight chance of showers this afternoon.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft. Showers likely.
.TUE...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Showers. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft. Showers with a chance of tstms.
.WED...SE winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.WED NIGHT...SE winds 5 kt. Waves less than 1 ft. Showers likely.
.THU...S winds 5 kt. Waves flat. A chance of showers.
.FRI...SW winds 5 kt. Waves less than 1 ft. A chance of showers. A
chance of tstms through the night.

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

$$

ANZ533-122100-
Chesapeake Bay from North Beach to Drum Point-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...SE winds 5 to 10 kt. Waves 1 ft or less... building to 2 ft
this afternoon. A chance of showers this afternoon.
.TONIGHT...SE winds 10 kt. Waves 2 ft. Showers likely.
.TUE...SE winds 15 to 20 kt. Gusts up to 25 kt. Waves 2 to 3 ft.
Showers. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
Showers with a chance of tstms.
.WED...SE winds 5 to 10 kt. Waves 1 to 2 ft. Showers likely with a
chance of tstms.
.WED NIGHT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...S winds around 5 kt. Waves 1 ft or less. A chance of showers.
.FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. A
chance of tstms through the night.

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

$$

ANZ541-122100-
Choptank River to Cambridge MD and the Little Choptank River-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...SE winds 5 to 10 kt...becoming S this afternoon. Waves 1 ft
or less. A chance of showers this afternoon.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft. Showers likely.
.TUE...SE winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft.
Showers. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
Showers with a chance of tstms.
.WED...SE winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.WED NIGHT...SE winds 5 to 10 kt. Waves 1 ft or less. A chance of
showers.
.THU...S winds around 5 kt. Waves 1 ft or less. A chance of showers.
.FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. A
chance of tstms through the night.

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

$$

ANZ542-122100-
Patuxent River to Broomes Island MD-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers this
afternoon.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft. Showers likely.
.TUE...SE winds 10 to 15 kt. Gusts up to 20 kt... increasing to
25 kt late. Waves 1 ft. Showers. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
Showers with a chance of tstms.
.WED...SE winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.WED NIGHT...SE winds around 5 kt. Waves 1 ft. A chance of showers.
.THU...S winds around 5 kt. Waves 1 ft. A chance of showers.
.FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. A
chance of tstms through the night.

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

$$

ANZ534-122100-
Chesapeake Bay from Drum Point to Smith Point-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...SE winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers
this afternoon.
.TONIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Showers likely.
.TUE...SE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
Showers. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
Showers with a chance of tstms.
.WED...SE winds 10 kt. Waves 1 to 2 ft. Showers likely.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...S winds 5 kt. Waves less than 1 ft. A chance of showers.
.FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
afternoon. A chance of showers and tstms through the night.

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

$$

ANZ543-122100-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
502 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers this
afternoon.
.TONIGHT...SE winds 10 kt. Waves 1 ft. Showers likely.
.TUE...SE winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
Showers. Vsby 1 to 3 NM.
.TUE NIGHT...SE winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
Showers with a chance of tstms.
.WED...SE winds 10 kt. Waves 1 ft. Showers likely.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...S winds 5 kt. Waves less than 1 ft. A chance of showers.
.FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
afternoon. A chance of showers and tstms through the night.

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

$$