943
FZUS51 KLWX 160627
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
227 AM EDT Wed Sep 16 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.

ANZ500-162000-
227 AM EDT Wed Sep 16 2026

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

Canadian high pressure will gradually push toward the Atlantic coast
 through tonight. A slow moving cold front across the Great Lakes
eventually crosses the waters by Friday morning. High pressure
briefly builds over the northeastern U.S. on Saturday before another
 frontal system looms nearby to finish the weekend. Small Craft
Advisories may be needed at times on Thursday due to southerly
channeling effects, again on Friday behind the cold front. Winds may
 again approach Small Craft Advisories during portions of the
weekend.

$$

ANZ535-162000-
Tidal Potomac from Key Bridge to Indian Head-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...S winds 5 kt. Waves less than 1 ft.
.WED...S winds around 5 kt. Waves 1 ft.
.WED NIGHT...S winds around 5 kt. Waves 1 ft.
.THU...S winds 5 kt. Waves less than 1 ft.
.THU NIGHT...SW winds around 5 kt. Waves 1 ft. A chance of showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.SAT...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.
.SUN...S winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft.
A chance of showers.

$$

ANZ536-162000-
Tidal Potomac from Indian Head to Cobb Island-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...S winds 5 kt. Waves less than 1 ft.
.WED...S winds around 5 kt. Waves 1 ft.
.WED NIGHT...S winds 5 kt. Waves less than 1 ft.
.THU...S winds 5 kt. Waves less than 1 ft.
.THU NIGHT...SW winds around 5 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.SAT...E winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.
.SUN...S winds 5 to 10 kt...becoming E after midnight. Waves 1 ft. A
chance of showers.

$$

ANZ537-162000-
Tidal Potomac from Cobb Island to Smith Point-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...S winds 5 to 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft or less.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Waves 1 to 2 ft.
.SAT...E winds 10 to 15 kt...becoming SE. Waves 1 to 2 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.

$$

ANZ530-162000-
Chesapeake Bay north of Pooles Island-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...S winds 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft or less.
.WED NIGHT...S winds 5 kt. Waves less than 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...N winds 10 to 15 kt. Waves 1 ft.
.SAT...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.
A chance of showers after midnight.
.SUN...SE winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft.
A chance of showers in the morning, then showers likely through the
night. A chance of showers after midnight.

$$

ANZ531-162000-
Chesapeake Bay from Pooles Island to Sandy Point-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...S winds 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 10 to 15 kt. Waves 1 to 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 to 2 ft. A chance of
showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...NE winds 10 to 15 kt...becoming SE after midnight. Waves 1 to
2 ft.
.SUN...S winds 10 to 15 kt...becoming E. Waves 2 ft. A chance of
showers through the day. Showers likely through the night.

$$

ANZ538-162000-
Patapsco River including Baltimore Harbor-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...S winds 5 kt. Waves less than 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft or less.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft or less.
.THU...S winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. A chance of
showers.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.SAT...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.
.SUN...S winds 5 to 10 kt...becoming E. Waves 1 ft. A chance of
showers in the morning. Showers likely.

$$

ANZ539-162000-
Chester River to Queenstown MD-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...S winds 10 kt. Waves 1 ft.
.WED...S winds 5 kt. Waves less than 1 ft.
.WED NIGHT...S winds 5 kt. Waves less than 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 10 kt. Waves 1 ft.
.SAT...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.
.SUN...SE winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft.
A chance of showers through the day. Showers likely through the
night.

$$

ANZ532-162000-
Chesapeake Bay from Sandy Point to North Beach-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...S winds 10 kt. Waves 1 ft.
.WED...S winds 10 to 15 kt. Waves 1 to 2 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft.
.THU...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft.
.THU NIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt after
midnight. Waves 1 to 2 ft. A chance of showers.
.FRI...N winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Waves 2 ft.
.SAT...E winds 10 to 15 kt...becoming SE. Waves 1 to 2 ft.
.SUN...S winds 10 to 15 kt...becoming NE after midnight. Waves 2 ft.
A chance of showers.

$$

ANZ540-162000-
Eastern Bay-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...SE winds 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft or less.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 10 kt. Waves 1 ft.
.SAT...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.
.SUN...S winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft.
A chance of showers through the day. Showers likely through the
night.

$$

ANZ533-162000-
Chesapeake Bay from North Beach to Drum Point-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...S winds 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft.
.THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt...becoming SW
5 to 10 kt after midnight. Waves 1 to 2 ft.
.FRI...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.FRI NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...E winds 10 to 15 kt...becoming SE. Waves 1 to 2 ft.
.SUN...S winds 10 to 15 kt...becoming E after midnight. Waves 2 ft.
A chance of showers.

$$

ANZ541-162000-
Choptank River to Cambridge MD and the Little Choptank River-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...SE winds 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft or less.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 10 to 15 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt after
midnight. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Waves 1 ft.
.SAT...NE winds 10 to 15 kt...becoming E 5 kt in the afternoon, then
becoming SE 10 to 15 kt. Waves 1 ft.
.SUN...S winds 10 to 15 kt...becoming E after midnight. Waves 1 ft.
A chance of showers.

$$

ANZ542-162000-
Patuxent River to Broomes Island MD-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...S winds 5 kt. Waves less than 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds 5 kt. Waves less than 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.SAT...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.
.SUN...S winds 5 to 10 kt...becoming E after midnight. Waves 1 ft. A
chance of showers.

$$

ANZ534-162000-
Chesapeake Bay from Drum Point to Smith Point-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...SE winds 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft.
.THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...NW winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Waves 2 ft.
.SAT...E winds 10 to 15 kt...becoming SE. Waves 1 to 2 ft.
.SUN...S winds 10 to 15 kt...becoming E after midnight. Waves 2 ft.
A chance of showers.

$$

ANZ543-162000-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
227 AM EDT Wed Sep 16 2026

.OVERNIGHT...SE winds 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft or less.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NE winds 10 kt. Waves 1 ft.
.SAT...E winds 10 to 15 kt...becoming SE after midnight. Waves 1 ft.
.SUN...S winds 10 to 15 kt...becoming E after midnight. Waves 1 ft.
A chance of showers.

$$