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FZUS51 KLWX 112058
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
458 PM EDT Tue Aug 11 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.

ANZ500-120800-
458 PM EDT Tue Aug 11 2026

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

High pressure will be persistent off the east coast into the middle
of the week while a cold front gradually approaches from the north.
Daily thunderstorm chances continue for the remainder of the  week.
Gusty winds and frequent cloud to ground lightning will be the
primary threats with any storms. The front may push to the south by
Friday night. Small Craft Advisories may be needed Friday night.

$$

ANZ535-120800-
Tidal Potomac from Key Bridge to Indian Head-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...W winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...SW winds around 5 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds around 5 kt. Waves 1 ft.
.WED NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.THU...W winds around 5 kt. Waves 1 ft. A chance of showers.
.THU NIGHT...W winds around 5 kt. Waves 1 ft. Showers likely.
.FRI...N winds around 5 kt. Waves 1 ft. A chance of showers through
the day.
.SAT...E winds around 5 kt. Waves 1 ft.

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

$$

ANZ536-120800-
Tidal Potomac from Indian Head to Cobb Island-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...W winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...SW winds around 5 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds around 5 kt. Waves 1 ft.
.WED NIGHT...W winds around 5 kt. Waves 1 ft.
.THU...W winds around 5 kt. Waves 1 ft. A chance of showers.
.THU NIGHT...SW winds around 5 kt. Waves 1 ft. Showers likely.
.FRI...N winds around 5 kt. Waves 1 ft. A chance of showers in the
morning, then a chance of showers and tstms through the night.
.SAT...E winds around 5 kt. Waves 1 ft.

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

$$

ANZ537-120800-
Tidal Potomac from Cobb Island to Smith Point-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...W winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 kt. Waves less than 1 ft.
.THU...W winds 5 kt. Waves flat. A chance of showers.
.THU NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms
through the night.
.SAT...NE winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.

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

$$

ANZ530-120800-
Chesapeake Bay north of Pooles Island-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft or less.
.WED NIGHT...W winds around 5 kt. Waves flat. A chance of showers.
.THU...W winds 5 kt. Waves less than 1 ft.
.THU NIGHT...SW winds around 5 kt. Waves 1 ft or less. A chance of
showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.SAT...N winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft
or less.

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

$$

ANZ531-120800-
Chesapeake Bay from Pooles Island to Sandy Point-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 kt. Waves less than 1 ft. A chance of
showers.
.THU...W winds 5 kt. Waves less than 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers
through the day.
.SAT...NE winds 5 to 10 kt...becoming S after midnight. Waves 1 to
2 ft...subsiding to flat.

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

$$

ANZ538-120800-
Patapsco River including Baltimore Harbor-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...W winds 5 kt. Waves flat. A chance of showers and tstms.
.WED...NW winds 5 kt. Waves flat.
.WED NIGHT...W winds 5 kt. Waves flat. A chance of showers.
.THU...W winds 5 kt. Waves flat. A chance of showers.
.THU NIGHT...SW winds around 5 kt. Waves flat. A chance of showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
through the day.
.SAT...NE winds 5 to 10 kt...becoming light. Waves 1 ft or less.

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

$$

ANZ539-120800-
Chester River to Queenstown MD-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds around 5 kt. Waves 1 ft or less. A chance of
showers.
.THU...W winds 5 kt. Waves less than 1 ft.
.THU NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of
showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the day.
.SAT...NE winds 5 to 10 kt...becoming S after midnight. Waves 1 ft
or less.

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

$$

ANZ532-120800-
Chesapeake Bay from Sandy Point to North Beach-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...W winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 kt. Waves less than 1 ft.
.THU...SW winds 5 kt. Waves less than 1 ft. A chance of showers.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.FRI...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers
through the day.
.SAT...NE winds 10 to 15 kt...becoming SE around 5 kt. Waves 1 to
2 ft.

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

$$

ANZ540-120800-
Eastern Bay-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...W winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds around 5 kt. Waves 1 ft or less. A chance of
showers.
.THU...SW winds 5 kt. Waves flat.
.THU NIGHT...SW winds around 5 kt. Waves 1 ft or less. Showers
likely.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers through
the day.
.SAT...NE winds 5 to 10 kt...becoming S after midnight. Waves 1 ft
or less.

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

$$

ANZ533-120800-
Chesapeake Bay from North Beach to Drum Point-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 kt. Waves less than 1 ft.
.THU...SW winds 5 kt. Waves less than 1 ft. A chance of showers.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.FRI...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in
the morning, then a chance of showers and tstms through the night.
.SAT...NE winds 10 to 15 kt...becoming SE 5 kt. Waves 1 to 2 ft.

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

$$

ANZ541-120800-
Choptank River to Cambridge MD and the Little Choptank River-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...W winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds around 5 kt. Waves 1 ft or less.
.THU...W winds 5 kt. Waves less than 1 ft. A chance of showers.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. Showers
likely.
.FRI...N winds 10 to 15 kt. Waves 1 ft. A chance of showers through
the day.
.SAT...N winds 10 to 15 kt...becoming SE around 5 kt. Waves 1 ft.

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

$$

ANZ542-120800-
Patuxent River to Broomes Island MD-
458 PM EDT Tue Aug 11 2026

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

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

$$

ANZ534-120800-
Chesapeake Bay from Drum Point to Smith Point-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...W winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.THU...SW winds 5 kt. Waves less than 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.FRI...N winds 5 to 10 kt...becoming NE after midnight. Waves 1 to
2 ft. A chance of showers and tstms through the night.
.SAT...NE winds 5 to 10 kt...becoming S after midnight. Waves 1 to
2 ft.

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

$$

ANZ543-120800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
458 PM EDT Tue Aug 11 2026

.REST OF THIS AFTERNOON...W winds 5 kt. Waves less than 1 ft. A
slight chance of showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 to 10 kt. Waves 1 ft or less.
.THU...SW winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.FRI...NW winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft.
A chance of showers and tstms through the night.
.SAT...NE winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.

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

$$