409
FZUS51 KLWX 232057
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
457 PM EDT Sun Aug 23 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.

ANZ500-240800-
457 PM EDT Sun Aug 23 2026

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

High pressure will gradually build toward the waters from the west
early this week, before shifting offshore later this week. Winds may
 near low-end SCA levels in southerly flow on Wednesday.

$$

ANZ535-240800-
Tidal Potomac from Key Bridge to Indian Head-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...W winds 10 kt. Waves 1 ft. A slight chance
of showers and tstms.
.TONIGHT...W winds around 5 kt. Waves 1 ft.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds around 5 kt. Waves 1 ft.
.TUE...NW winds around 5 kt. Waves 1 ft.
.TUE NIGHT...W winds around 5 kt. Waves 1 ft or less.
.WED...SE winds around 5 kt. Waves 1 ft. A chance of showers through
the night.
.THU...S 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.

$$

ANZ536-240800-
Tidal Potomac from Indian Head to Cobb Island-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...W winds 10 kt. Waves 1 ft. A slight chance
of showers and tstms.
.TONIGHT...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...NW winds around 5 kt. Waves 1 ft.
.TUE NIGHT...SW winds around 5 kt. Waves 1 ft or less.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers after
midnight.
.THU...S 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.

$$

ANZ537-240800-
Tidal Potomac from Cobb Island to Smith Point-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...NW winds 5 kt. Waves less than 1 ft.
.TONIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...W winds around 5 kt. Waves 1 ft or less.
.MON NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...SW winds around 5 kt. Waves flat.
.WED...S winds 10 to 15 kt. Waves 1 ft or less... building to 2 ft.
A chance of showers after midnight.
.THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers. A
chance of tstms through the night.

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

$$

ANZ530-240800-
Chesapeake Bay north of Pooles Island-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...W winds 10 kt. Waves 1 ft. A slight chance
of showers and tstms.
.TONIGHT...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.
.TUE...W winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...NW winds around 5 kt. Waves 1 ft.
.WED...SE winds around 5 kt...becoming S. Waves 1 ft. A chance of
showers after midnight.
.THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms.

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

$$

ANZ531-240800-
Chesapeake Bay from Pooles Island to Sandy Point-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...W winds 10 kt. Waves 1 ft. A slight chance
of showers and tstms.
.TONIGHT...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.
.TUE...W winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.WED...NE winds 5 kt...becoming S 10 to 15 kt. Waves 1 ft or less...
building to 2 ft after midnight. A chance of showers after midnight.
.THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in
the morning, then showers likely with a chance of tstms.

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

$$

ANZ538-240800-
Patapsco River including Baltimore Harbor-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...W winds 10 kt. Waves 1 ft. A slight chance
of showers and tstms.
.TONIGHT...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 5 kt. Waves less than 1 ft.
.TUE NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.WED...NE winds around 5 kt...becoming S. Waves 1 ft or less. A
chance of showers after midnight.
.THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms.

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

$$

ANZ539-240800-
Chester River to Queenstown MD-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...W winds 10 kt. Waves 1 ft. A slight chance
of showers and tstms.
.TONIGHT...W winds 5 to 10 kt. Waves 1 ft.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 kt. Waves less than 1 ft.
.TUE...W winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...W winds around 5 kt. Waves 1 ft or less.
.WED...SE winds around 5 kt...becoming S. Waves 1 ft or less. A
chance of showers after midnight.
.THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms.

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

$$

ANZ532-240800-
Chesapeake Bay from Sandy Point to North Beach-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...W winds 10 kt. Waves 1 ft.
.TONIGHT...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.
.TUE...W winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...W winds around 5 kt. Waves 1 ft.
.WED...NE winds 5 kt...becoming S 10 to 15 kt. Waves 1 ft or less...
building to 2 ft. A chance of showers after midnight.
.THU...S winds 10 to 15 kt. Waves 2 ft. A chance of showers in the
morning, then showers likely with a chance of tstms.

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

$$

ANZ540-240800-
Eastern Bay-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...W winds 10 kt. Waves 1 ft.
.TONIGHT...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.
.TUE...W winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...W winds around 5 kt. Waves 1 ft or less.
.WED...E winds around 5 kt...becoming S. Waves 1 ft or less. A
chance of showers after midnight.
.THU...S winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely with a chance of tstms.

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

$$

ANZ533-240800-
Chesapeake Bay from North Beach to Drum Point-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...W winds 10 kt. Waves 1 ft.
.TONIGHT...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.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...SW winds around 5 kt. Waves 1 ft.
.WED...W winds around 5 kt...becoming S 10 to 15 kt. Waves 1 ft or
less...building to 2 ft. A chance of showers after midnight.
.THU...S winds 10 to 15 kt. Waves 1 to 2 ft. Showers likely. A
chance of tstms through the night.

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

$$

ANZ541-240800-
Choptank River to Cambridge MD and the Little Choptank River-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...W winds 10 kt. Waves 1 ft.
.TONIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...W winds around 5 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...SW winds around 5 kt. Waves 1 ft.
.WED...E winds around 5 kt...becoming S 10 to 15 kt. Waves 1 ft or
less...building to 2 ft. A chance of showers after midnight.
.THU...S winds 10 to 15 kt. Waves 1 ft. Showers likely. A chance of
tstms through the night.

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

$$

ANZ542-240800-
Patuxent River to Broomes Island MD-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...W winds 5 kt. Waves less than 1 ft.
.TONIGHT...W winds around 5 kt. Waves 1 ft.
.MON...W winds around 5 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 kt. Waves less than 1 ft.
.TUE...NW winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...SW winds around 5 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers after
midnight.
.THU...S winds 5 to 10 kt. Waves 1 ft. Showers likely. A chance of
tstms through the night.

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

$$

ANZ534-240800-
Chesapeake Bay from Drum Point to Smith Point-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...NW winds 10 kt. Waves 1 ft.
.TONIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...W winds 5 kt. Waves less than 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...SW winds 5 kt. Waves less than 1 ft.
.WED...SW winds around 5 kt...becoming S 10 to 15 kt. Waves flat...
building to 2 to 3 ft. A chance of showers after midnight.
.THU...S winds 10 to 15 kt. Waves 2 to 3 ft. A chance of showers. A
chance of tstms through the night.

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

$$

ANZ543-240800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
457 PM EDT Sun Aug 23 2026

.REST OF THIS AFTERNOON...NW winds 10 kt. Waves 1 ft.
.TONIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...W winds around 5 kt. Waves 1 ft or less.
.MON NIGHT...W winds 5 kt...becoming N after midnight. Waves 1 ft or
less.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...SW winds 5 kt. Waves less than 1 ft.
.WED...SW winds 5 to 10 kt...becoming S 10 to 15 kt. Waves 1 ft or
less...building to 2 ft.
.THU...S winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers
through the day. Showers likely with a chance of tstms through the
night.

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

$$