217
FZUS51 KLWX 160535
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
135 AM EDT Wed Jul 16 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.

ANZ500-162000-
135 AM EDT Wed Jul 16 2025

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

A frontal system will stall over the region into Wednesday morning
before dissipating. A cold front approaches from the west on Friday
evening before crossing the waters by early Saturday. Thereafter,
this front may stall nearby. Small Craft Advisories may be needed
Wednesday evening into Thursday, particularly across the southern
waters.

$$

ANZ535-162000-
Tidal Potomac from Key Bridge to Indian Head-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...S winds 5 kt. Waves less than 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers
and tstms. Vsby 1 NM or less.
.THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds around 5 kt. Waves 1 ft. A chance of showers and
tstms.
.FRI NIGHT...N winds around 5 kt. Waves 1 ft or less.
.SAT...SE winds around 5 kt. Waves 1 ft or less. A chance of showers
and tstms.
.SUN...W winds around 5 kt. Waves 1 ft. Showers likely with a chance
of tstms.

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

$$

ANZ536-162000-
Tidal Potomac from Indian Head to Cobb Island-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...SW winds 5 kt. Waves less than 1 ft.
.WED...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.WED NIGHT...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.THU...SW winds 10 kt with gusts to 20 kt. Waves 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.FRI NIGHT...NW winds around 5 kt. Waves 1 ft. A chance of showers
and tstms.
.SAT...SE winds around 5 kt. Waves 1 ft. A chance of showers and
tstms.
.SUN...W winds around 5 kt. Waves 1 ft. Showers likely through the
night. A chance of tstms. A chance of showers after midnight.

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

$$

ANZ537-162000-
Tidal Potomac from Cobb Island to Smith Point-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...SW winds 5 to 10 kt. Waves 1 ft. A slight chance of
showers and tstms.
.WED...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt...increasing to
25 kt late. Waves 1 to 2 ft. A chance of showers and tstms.
.THU...SW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.FRI NIGHT...NW winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SAT...SE winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SUN...SW winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.

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

$$

ANZ530-162000-
Chesapeake Bay north of Pooles Island-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...S winds 5 kt. Waves flat.
.WED...S winds 5 to 10 kt. Waves 1 ft or less. Showers and tstms
likely. Vsby 1 NM or less.
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms
likely. Vsby 1 NM or less.
.THU...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers and tstms.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.FRI NIGHT...N winds 5 kt. Waves less than 1 ft.
.SAT...S winds 5 kt. Waves flat. A chance of showers. A chance of
tstms through the night.
.SUN...W winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.

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

$$

ANZ531-162000-
Chesapeake Bay from Pooles Island to Sandy Point-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...SW winds 5 kt. Waves less than 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Showers and tstms likely. Vsby 1 NM or less.
.THU...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of showers.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.FRI NIGHT...N winds 5 kt. Waves less than 1 ft.
.SAT...SE winds 5 kt. Waves flat. A chance of showers. A chance of
tstms through the night.
.SUN...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.

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

$$

ANZ538-162000-
Patapsco River including Baltimore Harbor-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...S winds 5 kt. Waves flat.
.WED...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
and tstms.
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers
and tstms. Vsby 1 NM or less.
.THU...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft or less.
.FRI...NW winds 5 kt. Waves flat. A chance of showers and tstms.
.FRI NIGHT...N winds around 5 kt. Waves flat.
.SAT...SE winds around 5 kt. Waves flat. A chance of showers. A
chance of tstms through the night.
.SUN...SW winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.

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

$$

ANZ539-162000-
Chester River to Queenstown MD-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...SW winds 5 kt. Waves flat.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft. Showers and tstms likely. Vsby 1 NM or less.
.THU...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of showers.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.FRI NIGHT...N winds around 5 kt. Waves 1 ft or less. A chance of
showers.
.SAT...SE winds 5 kt. Waves flat. A chance of showers. A chance of
tstms through the night.
.SUN...SW winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.

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

$$

ANZ532-162000-
Chesapeake Bay from Sandy Point to North Beach-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...SW winds 5 kt. Waves less than 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Showers and tstms likely. Vsby 1 NM or less.
.THU...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.FRI NIGHT...N winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms.
.SAT...SE winds 5 kt. Waves less than 1 ft. A chance of showers. A
chance of tstms through the night.
.SUN...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.

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

$$

ANZ540-162000-
Eastern Bay-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. A slight chance of
showers.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft. Showers and tstms likely. Vsby 1 NM or less.
.THU...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.FRI NIGHT...N winds 5 kt. Waves flat. A chance of showers and
tstms.
.SAT...SE winds around 5 kt. Waves flat. A chance of showers. A
chance of tstms through the night.
.SUN...W winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.

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

$$

ANZ533-162000-
Chesapeake Bay from North Beach to Drum Point-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. A slight chance of
showers and tstms.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.THU...SW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.FRI NIGHT...N winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms.
.SAT...SE winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SUN...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.

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

$$

ANZ541-162000-
Choptank River to Cambridge MD and the Little Choptank River-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. A slight chance of
showers.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.WED NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft. A chance of showers and tstms. Vsby 1 NM or less.
.THU...SW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.FRI NIGHT...N winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms.
.SAT...E winds 5 kt. Waves less than 1 ft. A chance of showers. A
chance of tstms through the night.
.SUN...W winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.

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

$$

ANZ542-162000-
Patuxent River to Broomes Island MD-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. A slight chance of
showers and tstms.
.WED...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED NIGHT...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.THU...SW winds 10 kt with gusts to 20 kt. Waves 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.FRI NIGHT...N winds around 5 kt. Waves 1 ft. A chance of showers
and tstms.
.SAT...SE winds around 5 kt. Waves 1 ft. A chance of showers and
tstms.
.SUN...SW winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.

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

$$

ANZ534-162000-
Chesapeake Bay from Drum Point to Smith Point-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...SW winds 10 kt. Waves 1 ft. A slight chance of showers
and tstms.
.WED...SW winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.WED NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 to
3 ft. A chance of showers and tstms. Vsby 1 NM or less.
.THU...SW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
.THU NIGHT...SW winds 10 to 15 kt. Waves 2 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers and
tstms.
.FRI NIGHT...NW winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SAT...SE winds 5 kt...becoming S after midnight. Waves 1 ft. A
chance of showers. A chance of tstms.
.SUN...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.

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

$$

ANZ543-162000-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
135 AM EDT Wed Jul 16 2025

.OVERNIGHT...SW winds 10 kt. Waves 1 ft. A chance of showers with a
slight chance of tstms.
.WED...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.WED NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.THU...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...SW winds 10 to 15 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.FRI NIGHT...N winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms.
.SAT...SE winds 5 kt...becoming S. Waves 1 ft or less. A chance of
showers. A chance of tstms.
.SUN...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. A
chance of tstms.

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

$$