618
FZUS51 KLWX 181827
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
226 PM EDT Fri Sep 18 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.

ANZ500-190800-
226 PM EDT Fri Sep 18 2026

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

High pressure briefly will build over the northeastern U.S. on
Saturday before a frontal system looms nearby on Sunday and into
early next week. Wind gusts remain elevated at times Saturday night
through Tuesday, which may prompt Small Craft Advisories.

$$

ANZ535-190800-
Tidal Potomac from Key Bridge to Indian Head-
226 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.SAT...NE winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SUN NIGHT...SW winds 5 to 10 kt...becoming NW after midnight. Waves
1 ft. Showers likely with a chance of tstms.
.MON...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.TUE...NE winds 10 to 15 kt. Waves 1 ft. A chance of showers in the
morning, then showers likely through the night. A chance of showers
after midnight.

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

$$

ANZ536-190800-
Tidal Potomac from Indian Head to Cobb Island-
226 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.SAT...NE winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.MON...NE winds 10 to 15 kt. Waves 1 ft. A chance of showers.
.TUE...NE winds 15 to 20 kt. Waves 1 to 2 ft. A chance of showers in
the morning, then showers likely through the night. A chance of
showers after midnight.

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

$$

ANZ537-190800-
Tidal Potomac from Cobb Island to Smith Point-
226 PM EDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
AFTERNOON...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY AFTERNOON THROUGH
LATE SATURDAY NIGHT...

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...NE winds 10 to 15 kt. Waves 1 to 2 ft.
.SAT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN...S winds 10 kt with gusts to 20 kt. Waves 2 ft.
.SUN NIGHT...S winds 10 to 15 kt...becoming W 5 to 10 kt after
midnight. Gusts up to 20 kt. Waves 1 to 2 ft. A chance of showers.
.MON...NE winds 10 to 15 kt...increasing to 15 to 20 kt after
midnight. Waves 1 to 2 ft...building to 3 ft. A chance of showers.
.TUE...NE winds 20 to 25 kt. Waves 4 ft. A chance of showers in the
morning. Showers likely through the night, then a chance of showers
after midnight.

$$

ANZ530-190800-
Chesapeake Bay north of Pooles Island-
226 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SAT...NE winds 10 to 15 kt with gusts to 20 kt... becoming E 5 to
10 kt late. Waves 1 ft.
.SAT NIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of showers.
.SUN NIGHT...SW winds 5 to 10 kt...becoming NW after midnight. Waves
1 ft. Showers likely.
.MON...NE winds 15 to 20 kt. Waves 1 to 2 ft. A chance of showers.
.TUE...NE winds 15 to 20 kt. Waves 2 ft. A chance of showers.

$$

ANZ531-190800-
Chesapeake Bay from Pooles Island to Sandy Point-
226 PM EDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH SATURDAY MORNING...

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...NE winds 10 to 15 kt with gusts to 20 kt... becoming E 5 to
10 kt late. Waves 1 to 2 ft.
.SAT NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.SUN...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance
of showers.
.SUN NIGHT...SW winds 10 to 15 kt...becoming NW after midnight.
Gusts up to 20 kt. Waves 1 to 2 ft. Showers likely.
.MON...NE winds 15 to 20 kt. Waves 2 to 3 ft. A chance of showers.
.TUE...NE winds 20 to 25 kt. Waves 3 ft. A chance of showers.

$$

ANZ538-190800-
Patapsco River including Baltimore Harbor-
226 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...N winds 10 kt. Waves 1 ft.
.SAT...NE winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...SE winds 10 kt. Waves 1 ft.
.SUN...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance
of showers.
.SUN NIGHT...SW winds 5 to 10 kt...becoming NW after midnight. Waves
1 ft. Showers likely with a chance of tstms.
.MON...NE winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers.
.TUE...NE winds 15 to 20 kt. Waves 2 ft. A chance of showers.

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

$$

ANZ539-190800-
Chester River to Queenstown MD-
226 PM EDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH SATURDAY MORNING...

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...NE winds 10 to 15 kt...becoming E 5 to 10 kt late. Gusts up
to 20 kt. Waves 1 to 2 ft.
.SAT NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN NIGHT...SW winds 10 to 15 kt...becoming NW after midnight.
Gusts up to 20 kt. Waves 1 to 2 ft. Showers likely.
.MON...NE winds 15 to 20 kt. Waves 1 to 2 ft. A chance of showers.
.TUE...NE winds 15 to 20 kt. Waves 2 ft. A chance of showers.

$$

ANZ532-190800-
Chesapeake Bay from Sandy Point to North Beach-
226 PM EDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH SATURDAY MORNING...

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.SAT NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN NIGHT...S winds 10 kt...becoming NW after midnight. Gusts up to
20 kt. Waves 1 to 2 ft. Showers likely.
.MON...NE winds 10 to 15 kt...increasing to 15 to 20 kt. Waves 2 to
3 ft. A chance of showers.
.TUE...NE winds 20 to 25 kt. Waves 3 ft. A chance of showers.

$$

ANZ540-190800-
Eastern Bay-
226 PM EDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH SATURDAY MORNING...

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.SAT...NE winds 10 to 15 kt...becoming E late. Gusts up to 20 kt.
Waves 1 to 2 ft.
.SAT NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.SUN NIGHT...S winds 10 to 15 kt...becoming NW after midnight. Gusts
up to 20 kt. Waves 1 to 2 ft. Showers likely.
.MON...NE winds 10 to 15 kt...increasing to 15 to 20 kt. Waves 1 to
2 ft. A chance of showers.
.TUE...NE winds 15 to 20 kt. Waves 2 ft. A chance of showers.

$$

ANZ533-190800-
Chesapeake Bay from North Beach to Drum Point-
226 PM EDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH SATURDAY MORNING...

.THIS AFTERNOON...N winds 10 kt. Waves 1 to 2 ft.
.TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN NIGHT...S winds 10 to 15 kt...becoming W after midnight. Gusts
up to 20 kt. Waves 1 to 2 ft. Showers likely.
.MON...N winds 10 to 15 kt...becoming NE 15 to 20 kt. Waves 2 to
3 ft. A chance of showers.
.TUE...NE winds 25 to 30 kt. Waves 4 ft. A chance of showers.

$$

ANZ541-190800-
Choptank River to Cambridge MD and the Little Choptank River-
226 PM EDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH SATURDAY MORNING...

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.SAT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.SAT NIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SUN...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN NIGHT...S winds 10 to 15 kt...becoming W after midnight. Gusts
up to 20 kt. Waves 1 to 2 ft. Showers likely.
.MON...N winds 10 to 15 kt...becoming NE 15 to 20 kt. Waves 2 ft. A
chance of showers.
.TUE...NE winds 20 to 25 kt. Waves 2 to 3 ft. A chance of showers.

$$

ANZ542-190800-
Patuxent River to Broomes Island MD-
226 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...NE winds 10 kt. Waves 1 ft.
.SAT...NE winds 5 to 10 kt. Waves 1 ft.
.SAT NIGHT...SE winds 10 kt. Waves 1 ft.
.SUN...S winds 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 10 kt...becoming W after midnight. Waves 1 ft.
A chance of showers.
.MON...NE winds 10 kt. Waves 1 ft. A chance of showers.
.TUE...NE winds 15 to 20 kt. Waves 1 ft. A chance of showers.

$$

ANZ534-190800-
Chesapeake Bay from Drum Point to Smith Point-
226 PM EDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
AFTERNOON...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY AFTERNOON THROUGH
LATE SATURDAY NIGHT...

.THIS AFTERNOON...N winds 10 kt. Waves 2 ft.
.TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...NE winds 10 to 15 kt. Gusts up to 20 kt. Waves 2 ft.
.SAT NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SUN...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft.
.SUN NIGHT...S winds 10 to 15 kt...becoming W after midnight. Gusts
up to 20 kt. Waves 2 to 3 ft. A chance of showers.
.MON...N winds 10 to 15 kt...becoming NE 15 to 20 kt. Waves 2 to
3 ft. A chance of showers. A chance of tstms through the night.
.TUE...NE winds 20 to 25 kt. Waves 4 ft. A chance of showers.

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

$$

ANZ543-190800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
226 PM EDT Fri Sep 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
AFTERNOON...
...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY AFTERNOON THROUGH
LATE SATURDAY NIGHT...

.THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.SAT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.SAT NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.SUN...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.SUN NIGHT...S winds 10 to 15 kt...becoming SW after midnight. Gusts
up to 20 kt. Waves 2 ft. A chance of showers.
.MON...N winds 10 to 15 kt...becoming NE 15 to 20 kt. Waves 1 to
2 ft. A chance of showers. A chance of tstms through the night.
.TUE...NE winds 20 to 25 kt. Waves 2 to 3 ft. A chance of showers.

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

$$