506
FZUS51 KLWX 212357
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
756 PM EDT Fri Aug 21 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.

ANZ500-220800-
756 PM EDT Fri Aug 21 2026

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

Weak areas of low pressure will traverse the waters during the
weekend keeping stormy weather through Sunday. Weak high pressure
builds over the waters for early next week bringing fair weather.

$$

ANZ535-220800-
Tidal Potomac from Key Bridge to Indian Head-
756 PM EDT Fri Aug 21 2026

.TONIGHT...E winds around 5 kt. Waves 1 ft or less. Showers likely
with a slight chance of tstms after midnight.
.SAT...E winds around 5 kt. Waves 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds around 5 kt. Waves 1 ft or less. A chance of
showers and tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...W winds around 5 kt. Waves 1 ft.
.MON NIGHT...NW winds around 5 kt. Waves 1 ft.
.TUE...SW winds around 5 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the night.

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

$$

ANZ536-220800-
Tidal Potomac from Indian Head to Cobb Island-
756 PM EDT Fri Aug 21 2026

.TONIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of showers
this evening, then showers with a slight chance of tstms after
midnight.
.SAT...E winds around 5 kt. Waves 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds around 5 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...W winds around 5 kt. Waves 1 ft.
.SUN NIGHT...NW winds around 5 kt. Waves 1 ft.
.MON...W winds around 5 kt. Waves 1 ft.
.MON NIGHT...NW winds around 5 kt. Waves 1 ft.
.TUE...SW winds around 5 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the night.

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

$$

ANZ537-220800-
Tidal Potomac from Cobb Island to Smith Point-
756 PM EDT Fri Aug 21 2026

.TONIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of showers
this evening, then showers with a slight chance of tstms after
midnight.
.SAT...E winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...S winds around 5 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...W winds 5 kt. Waves less than 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 kt. Waves less than 1 ft.
.MON NIGHT...N winds 5 to 10 kt. Waves 1 ft or less.
.TUE...NE winds around 5 kt. Waves 1 ft or less.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the night.

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

$$

ANZ530-220800-
Chesapeake Bay north of Pooles Island-
756 PM EDT Fri Aug 21 2026

.TONIGHT...SE winds around 5 kt. Waves flat. A chance of showers
after midnight.
.SAT...E winds 5 kt. Waves less than 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...E winds around 5 kt. Waves 1 ft or less. Showers likely
with a chance of tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.TUE...W winds around 5 kt. Waves flat.
.WED...S winds around 5 kt. Waves 1 ft or less. A chance of showers
through the night.

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

$$

ANZ531-220800-
Chesapeake Bay from Pooles Island to Sandy Point-
756 PM EDT Fri Aug 21 2026

.TONIGHT...SE winds 5 kt. Waves flat. A chance of showers after
midnight.
.SAT...E winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt...becoming SW. Waves 1 ft or less.
.WED...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the night.

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

$$

ANZ538-220800-
Patapsco River including Baltimore Harbor-
756 PM EDT Fri Aug 21 2026

.TONIGHT...SE winds around 5 kt. Waves flat. A chance of showers
after midnight.
.SAT...E winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds around 5 kt. Waves 1 ft or less. A chance of
showers and tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft or less.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.TUE...W winds around 5 kt. Waves flat.
.WED...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the night.

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

$$

ANZ539-220800-
Chester River to Queenstown MD-
756 PM EDT Fri Aug 21 2026

.TONIGHT...SE winds around 5 kt. Waves flat. Showers likely after
midnight.
.SAT...E winds 5 kt. Waves less than 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds around 5 kt. Waves 1 ft or less. Showers
likely with a chance of tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...W winds 5 kt. Waves less than 1 ft.
.MON NIGHT...NW winds 5 kt. Waves less than 1 ft.
.TUE...W winds around 5 kt. Waves 1 ft or less.
.WED...S winds 5 kt. Waves less than 1 ft. A chance of showers
through the night.

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

$$

ANZ532-220800-
Chesapeake Bay from Sandy Point to North Beach-
756 PM EDT Fri Aug 21 2026

.TONIGHT...SE winds 5 kt. Waves less than 1 ft. Showers likely after
midnight.
.SAT...E winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds 5 to 10 kt...becoming SW late. Waves 1 ft. A
chance of showers and tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt...becoming S. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers
through the night.

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

$$

ANZ540-220800-
Eastern Bay-
756 PM EDT Fri Aug 21 2026

.TONIGHT...E winds 5 kt. Waves flat. Showers likely after midnight.
.SAT...E winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds around 5 kt. Waves 1 ft or less. Showers
likely with a chance of tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...W winds 5 kt. Waves less than 1 ft.
.MON NIGHT...NW winds 5 kt. Waves less than 1 ft.
.TUE...W winds around 5 kt. Waves 1 ft or less.
.WED...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the night.

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

$$

ANZ533-220800-
Chesapeake Bay from North Beach to Drum Point-
756 PM EDT Fri Aug 21 2026

.TONIGHT...E winds 5 kt. Waves less than 1 ft. A chance of showers
this evening, then showers with a slight chance of tstms after
midnight.
.SAT...E winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of
showers and tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt...becoming S. Waves 1 ft.
.WED...S winds 5 kt...increasing to 10 to 15 kt. Waves 1 to 2 ft. A
chance of showers through the night.

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

$$

ANZ541-220800-
Choptank River to Cambridge MD and the Little Choptank River-
756 PM EDT Fri Aug 21 2026

.TONIGHT...E winds 5 kt. Waves less than 1 ft. Showers likely after
midnight.
.SAT...E winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds around 5 kt. Waves 1 ft or less. A chance of
showers and tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt...becoming S. Waves 1 ft or less.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the night.

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

$$

ANZ542-220800-
Patuxent River to Broomes Island MD-
756 PM EDT Fri Aug 21 2026

.TONIGHT...E winds 5 kt. Waves less than 1 ft. A chance of showers
this evening, then showers with a slight chance of tstms after
midnight.
.SAT...E winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds around 5 kt. Waves 1 ft. A chance of showers
and tstms.
.SUN...W winds around 5 kt. Waves 1 ft.
.SUN NIGHT...NW winds around 5 kt. Waves 1 ft.
.MON...NW winds 5 kt. Waves less than 1 ft.
.MON NIGHT...NW winds around 5 kt. Waves 1 ft.
.TUE...SW winds around 5 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the night.

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

$$

ANZ534-220800-
Chesapeake Bay from Drum Point to Smith Point-
756 PM EDT Fri Aug 21 2026

.TONIGHT...E winds 5 to 10 kt. Waves 1 ft. A slight chance of
showers this evening, then showers with a slight chance of tstms
after midnight.
.SAT...E winds 5 to 10 kt. Waves 2 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds 5 to 10 kt...becoming W late. Waves 1 ft.
Showers likely with a chance of tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt...becoming SE. Waves 1 ft.
.WED...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers
through the night.

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

$$

ANZ543-220800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
756 PM EDT Fri Aug 21 2026

.TONIGHT...E winds 5 to 10 kt. Waves 1 ft or less. A slight chance
of showers this evening, then showers likely with a slight chance of
tstms after midnight.
.SAT...E winds 5 to 10 kt. Waves 1 ft. Showers with a chance of
tstms.
.SAT NIGHT...SE winds 5 to 10 kt...becoming SW late. Waves 1 ft.
Showers likely with a chance of tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...NW winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...N winds 5 to 10 kt. Waves 1 ft or less.
.TUE...NW winds 5 to 10 kt...becoming SE. Waves 1 ft or less.
.WED...S winds 10 to 15 kt. Waves 1 ft. A chance of showers through
the night.

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

$$