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FZUS51 KLWX 111459
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1058 AM 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.

ANZ500-112000-
1058 AM 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. Special Marine Warnings will be a
possibility each day today through Friday.

$$

ANZ535-112000-
Tidal Potomac from Key Bridge to Indian Head-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 5 kt. Waves less than 1 ft. A slight chance
of showers and tstms this afternoon.
.TONIGHT...W winds around 5 kt. Waves 1 ft. A chance of showers and
tstms.
.WED...NW winds 5 kt. Waves less than 1 ft.
.WED NIGHT...S winds around 5 kt. Waves 1 ft or less.
.THU...W winds around 5 kt. Waves 1 ft.
.THU NIGHT...NW winds around 5 kt. Waves 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 around 5 kt. Waves 1 ft.

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

$$

ANZ536-112000-
Tidal Potomac from Indian Head to Cobb Island-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 5 kt. Waves less than 1 ft. A slight chance
of showers and tstms this afternoon.
.TONIGHT...W winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds around 5 kt. Waves 1 ft.
.THU...W winds around 5 kt. Waves 1 ft.
.THU NIGHT...NW winds around 5 kt. Waves 1 ft. A chance of showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT...NE winds around 5 kt. Waves 1 ft or less.

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

$$

ANZ537-112000-
Tidal Potomac from Cobb Island to Smith Point-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 5 to 10 kt. Waves 1 ft. A slight chance of
showers this afternoon.
.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...S winds 5 kt. Waves less than 1 ft.
.THU...W winds 5 kt. Waves less than 1 ft.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.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.

$$

ANZ530-112000-
Chesapeake Bay north of Pooles Island-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 10 kt. Waves 1 ft.
.TONIGHT...W winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms.
.WED...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED NIGHT...SW winds around 5 kt. Waves flat. A chance of showers.
.THU...W winds around 5 kt. Waves 1 ft or less. A chance of showers.
.THU NIGHT...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.
.SAT...N 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.

$$

ANZ531-112000-
Chesapeake Bay from Pooles Island to Sandy Point-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...SW winds 5 to 10 kt. Waves 1 ft.
.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...SW winds 5 kt. Waves flat. A chance of showers.
.THU...W winds 5 kt. Waves less than 1 ft.
.THU NIGHT...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI...N winds 10 to 15 kt. Waves 1 to 2 ft.
.SAT...N winds 5 to 10 kt...becoming S after midnight. Waves 1 to
2 ft...subsiding to flat after midnight.

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

$$

ANZ538-112000-
Patapsco River including Baltimore Harbor-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 5 kt. Waves less than 1 ft.
.TONIGHT...W winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms.
.WED...NW winds 5 kt. Waves less than 1 ft.
.WED NIGHT...SW winds 5 kt. Waves flat. A chance of showers.
.THU...W winds 5 kt. Waves flat.
.THU NIGHT...NW winds 5 kt. Waves flat. A chance of showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers in the
morning.
.SAT...NE winds 5 to 10 kt...becoming SW after midnight. Waves 1 ft
or less.

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

$$

ANZ539-112000-
Chester River to Queenstown MD-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 5 to 10 kt. Waves 1 ft.
.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...SW winds around 5 kt. Waves flat. A chance of showers.
.THU...W winds 5 kt. Waves less than 1 ft.
.THU NIGHT...NW winds 5 kt. Waves less than 1 ft. A chance of
showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.SAT...N 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.

$$

ANZ532-112000-
Chesapeake Bay from Sandy Point to North Beach-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...SW winds 5 kt. Waves less than 1 ft.
.TONIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED NIGHT...S winds 5 kt. Waves less than 1 ft. A chance of
showers.
.THU...W winds 5 kt. Waves less than 1 ft.
.THU NIGHT...W 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 in
the morning.
.SAT...N winds 10 to 15 kt...becoming SE 5 kt. Waves 1 to 2 ft...
subsiding to flat after midnight.

$$

ANZ540-112000-
Eastern Bay-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 5 to 10 kt. Waves 1 ft.
.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. A chance of showers.
.WED NIGHT...S winds around 5 kt. Waves flat. A chance of showers.
.THU...W winds 5 kt. Waves less than 1 ft.
.THU NIGHT...W 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 in the
morning.
.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.

$$

ANZ533-112000-
Chesapeake Bay from North Beach to Drum Point-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 5 kt. Waves less than 1 ft.
.TONIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds 5 kt. Waves less than 1 ft.
.THU...W winds 5 kt. Waves less than 1 ft.
.THU NIGHT...W 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.
.SAT...N winds 10 to 15 kt...becoming SE 5 kt. Waves 1 to 2 ft.

$$

ANZ541-112000-
Choptank River to Cambridge MD and the Little Choptank River-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 5 to 10 kt. Waves 1 ft.
.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...S 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...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI...N winds 10 to 15 kt. Waves 1 ft.
.SAT...N winds 10 to 15 kt...becoming SE 5 kt. Waves 1 ft or less.

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

$$

ANZ542-112000-
Patuxent River to Broomes Island MD-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 5 kt. Waves less than 1 ft. A slight chance
of showers this afternoon.
.TONIGHT...W winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds around 5 kt. Waves 1 ft.
.THU...W winds around 5 kt. Waves 1 ft.
.THU NIGHT...W winds around 5 kt. Waves 1 ft. A chance of showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.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.

$$

ANZ534-112000-
Chesapeake Bay from Drum Point to Smith Point-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 5 to 10 kt. Waves 1 ft.
.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 to 2 ft.
.WED NIGHT...E winds 5 kt...becoming S after midnight. Waves 1 ft.
.THU...W winds 5 kt. Waves less than 1 ft.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers.
.SAT...NE winds 10 to 15 kt...becoming S 5 to 10 kt after midnight.
Waves 1 to 2 ft.

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

$$

ANZ543-112000-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1058 AM EDT Tue Aug 11 2026

.REST OF TODAY...W winds 5 to 10 kt. Waves 1 ft.
.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...SW winds 5 to 10 kt. Waves 1 ft.
.THU...W winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT...N winds 10 to 15 kt...becoming E 5 to 10 kt in the evening,
then becoming S after midnight. Waves 1 ft.

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

$$