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FZUS51 KLWX 180257
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1057 PM EDT Mon Aug 17 2026

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.

ANZ500-180800-
1057 PM EDT Mon Aug 17 2026

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

A cold front approaching from the upper Ohio River Valley will
cross the region by tonight. High pressure will build in from the
Midwest Tuesday. Another cold front will approach from the west late
 Wednesday into Thursday, then linger into Friday. Coastal low
pressure may develop Saturday.

$$

ANZ535-180800-
Tidal Potomac from Key Bridge to Indian Head-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds 5 kt. Waves less than 1 ft. Isolated
showers and tstms late this evening.
.TUE...N winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.WED...NW winds around 5 kt. Waves 1 ft.
.WED NIGHT...SW winds around 5 kt. Waves 1 ft or less. A chance of
showers.
.THU...NW winds around 5 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.THU NIGHT...N winds around 5 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...NE winds around 5 kt. Waves 1 ft. A chance of showers through
the day. A chance of tstms. Showers likely through the night.
.SAT...E winds around 5 kt. Waves 1 ft. A chance of showers.

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

$$

ANZ536-180800-
Tidal Potomac from Indian Head to Cobb Island-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds 5 kt. Waves less than 1 ft. Scattered
showers with isolated tstms late this evening.
.TUE...N winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...N winds around 5 kt. Waves 1 ft.
.WED...NW winds around 5 kt. Waves 1 ft.
.WED NIGHT...SW winds around 5 kt. Waves 1 ft. A chance of showers.
.THU...N winds around 5 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...N winds around 5 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...NE winds around 5 kt. Waves 1 ft or less. A chance of showers
in the morning, then showers likely with a chance of tstms.
.SAT...NE winds around 5 kt. Waves 1 ft. A chance of showers.

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

$$

ANZ537-180800-
Tidal Potomac from Cobb Island to Smith Point-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds 5 kt. Waves flat. Scattered showers and
tstms late this evening, then scattered showers with isolated tstms.
.TUE...N winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...N winds around 5 kt. Waves 1 ft or less.
.WED...NW winds around 5 kt. Waves flat.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...N winds around 5 kt. Waves 1 ft or less. A chance of showers
and tstms.
.THU NIGHT...NE winds 5 kt. Waves less than 1 ft. Showers with a
chance of tstms.
.FRI...NE winds 5 kt. Waves less than 1 ft. A chance of showers in
the morning, then showers likely with a chance of tstms.
.SAT...NW winds 5 kt. Waves less than 1 ft. A chance of showers in
the morning, then showers likely through the night. A chance of
showers after midnight.

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

$$

ANZ530-180800-
Chesapeake Bay north of Pooles Island-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds 5 kt. Waves less than 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...N winds around 5 kt. Waves 1 ft.
.WED...W winds around 5 kt. Waves 1 ft.
.WED NIGHT...SW winds around 5 kt. Waves 1 ft. A chance of showers.
.THU...NW winds around 5 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.THU NIGHT...N winds around 5 kt. Waves 1 ft. A chance of showers.
.FRI...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers. A
chance of tstms through the night.
.SAT...E winds 5 kt. Waves less than 1 ft. A chance of showers.

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

$$

ANZ531-180800-
Chesapeake Bay from Pooles Island to Sandy Point-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds 5 kt. Waves less than 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...N winds around 5 kt. Waves 1 ft or less.
.WED...W winds around 5 kt. Waves 1 ft or less.
.WED NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers.
.THU...N winds 5 kt. Waves flat. Showers likely with a chance of
tstms.
.THU NIGHT...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the day. A chance of tstms. Showers likely through the night.
.SAT...E winds 5 kt. Waves less than 1 ft. A chance of showers.

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

$$

ANZ538-180800-
Patapsco River including Baltimore Harbor-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds around 5 kt. Waves flat.
.TUE...N winds 5 kt. Waves flat.
.TUE NIGHT...N winds around 5 kt. Waves flat.
.WED...W winds around 5 kt. Waves flat.
.WED NIGHT...SW winds 5 kt. Waves flat.
.THU...N winds 5 kt. Waves flat. Showers likely with a chance of
tstms.
.THU NIGHT...N winds around 5 kt. Waves flat. A chance of showers.
.FRI...NE winds around 5 kt. Waves 1 ft or less. A chance of showers
through the day. A chance of tstms. Showers likely through the
night.
.SAT...E winds 5 kt. Waves less than 1 ft. A chance of showers.

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

$$

ANZ539-180800-
Chester River to Queenstown MD-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds around 5 kt. Waves flat.
.TUE...N winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...N winds around 5 kt. Waves 1 ft or less.
.WED...W winds around 5 kt. Waves flat.
.WED NIGHT...SW winds around 5 kt. Waves flat. A chance of showers.
.THU...N winds 5 kt. Waves flat. Showers likely with a chance of
tstms.
.THU NIGHT...N winds around 5 kt. Waves 1 ft or less. Showers
likely.
.FRI...NE winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the day. A chance of tstms. Showers likely through the
night.
.SAT...E winds 5 kt. Waves less than 1 ft. Showers likely, mainly in
the morning.

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

$$

ANZ532-180800-
Chesapeake Bay from Sandy Point to North Beach-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds 5 kt. Waves less than 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...N winds around 5 kt. Waves 1 ft or less.
.WED...W winds 5 kt. Waves less than 1 ft.
.WED NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers.
.THU...N winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.
.THU NIGHT...NE winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the day. A chance of tstms. Showers likely through the night.
.SAT...NE winds 5 kt...becoming S. Waves 1 ft. A chance of showers.

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

$$

ANZ540-180800-
Eastern Bay-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds 5 kt. Waves flat.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...N winds around 5 kt. Waves flat.
.WED...W winds around 5 kt. Waves flat.
.WED NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers.
.THU...N winds 5 kt. Waves flat. Showers likely with a chance of
tstms.
.THU NIGHT...NE winds around 5 kt. Waves 1 ft or less. Showers
likely with a chance of tstms.
.FRI...NE winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the day. A chance of tstms. Showers likely through the
night.
.SAT...E winds 5 kt. Waves less than 1 ft. Showers likely, mainly in
the morning.

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

$$

ANZ533-180800-
Chesapeake Bay from North Beach to Drum Point-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds 5 kt. Waves less than 1 ft. Scattered
showers and tstms late this evening, then isolated showers and
tstms.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...N winds around 5 kt. Waves 1 ft or less.
.WED...NW winds 5 kt. Waves flat.
.WED NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...N winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.
.THU NIGHT...E winds 5 kt...becoming N after midnight. Waves 1 ft.
Showers likely with a chance of tstms.
.FRI...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms.
.SAT...E winds 5 kt. Waves less than 1 ft. A chance of showers.

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

$$

ANZ541-180800-
Choptank River to Cambridge MD and the Little Choptank River-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds 5 kt. Waves less than 1 ft. Isolated
showers and tstms.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...N winds around 5 kt. Waves 1 ft or less.
.WED...NW winds around 5 kt. Waves flat.
.WED NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers.
.THU...NW winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms.
.THU NIGHT...NE winds 5 kt. Waves less than 1 ft. Showers likely
with a chance of tstms.
.FRI...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms.
.SAT...E winds 5 kt. Waves less than 1 ft. Showers likely, mainly in
the morning.

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

$$

ANZ542-180800-
Patuxent River to Broomes Island MD-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...NW winds 5 kt. Waves less than 1 ft. Scattered
showers. Scattered tstms late this evening, then isolated tstms.
.TUE...N winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...N winds around 5 kt. Waves 1 ft.
.WED...NW winds around 5 kt. Waves 1 ft.
.WED NIGHT...SW winds around 5 kt. Waves 1 ft. A chance of showers.
.THU...N winds around 5 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...NE winds around 5 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.FRI...NE winds around 5 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms.
.SAT...E winds around 5 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely through the night. A chance of showers
after midnight.

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

$$

ANZ534-180800-
Chesapeake Bay from Drum Point to Smith Point-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...W winds 5 kt. Waves less than 1 ft. Scattered
showers. Scattered tstms late this evening, then isolated tstms.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 kt. Waves less than 1 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...SE winds 5 to 10 kt...becoming NW after midnight. Waves
1 ft. Showers with a chance of tstms.
.FRI...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms.
.SAT...NW winds 5 to 10 kt...becoming S. Waves 1 ft. Showers likely.
A chance of showers after midnight.

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

$$

ANZ543-180800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1057 PM EDT Mon Aug 17 2026

.REST OF TONIGHT...W winds 5 kt. Waves less than 1 ft. Scattered
showers and tstms late this evening, then scattered showers with
isolated tstms.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...N winds 5 to 10 kt. Waves 1 ft or less.
.WED...NW winds 5 kt. Waves flat.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.THU...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance
of tstms.
.THU NIGHT...S winds 5 to 10 kt...becoming W after midnight. Waves
1 ft. Showers with a chance of tstms.
.FRI...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms.
.SAT...W winds 5 to 10 kt...becoming S. Waves 1 ft. Showers likely.

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

$$