551
FZUS51 KLWX 160949
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
549 AM EDT Sun Aug 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.

ANZ500-162100-
549 AM EDT Sun Aug 16 2026

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

A warm front overhead will lift slowly northeastward across the
region through tonight. A cold front approaching from the upper Ohio
 Valley will follow for Monday. High pressure will build in from the
 Midwest Tuesday, then another cold front will approach from the
west  Wednesday into Thursday.

$$

ANZ535-162100-
Tidal Potomac from Key Bridge to Indian Head-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH THIS
EVENING...

.TODAY...S winds 5 to 10 kt. Gusts up to 20 kt late this morning and
afternoon. Waves 1 ft. Numerous showers with isolated tstms this
morning, then numerous showers and scattered tstms this afternoon.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Showers and scattered
tstms.
.MON...W winds 5 to 10 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...NW winds around 5 kt. Waves 1 ft or less.
.WED...SW winds around 5 kt. Waves 1 ft. A chance of showers after
midnight.
.THU...N winds around 5 kt. Waves 1 ft. A chance of showers. A
chance of tstms through the night.

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

$$

ANZ536-162100-
Tidal Potomac from Indian Head to Cobb Island-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH THIS
EVENING...

.TODAY...S winds 5 to 10 kt. Gusts up to 20 kt late this morning and
afternoon. Waves 1 ft. Scattered showers this morning, then
scattered showers and tstms this afternoon.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Numerous showers and
scattered tstms.
.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...NW winds around 5 kt. Waves 1 ft or less.
.WED...SW winds around 5 kt. Waves 1 ft.
.THU...N winds 5 kt. Waves less than 1 ft. A chance of tstms through
the night. A chance of showers.

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

$$

ANZ537-162100-
Tidal Potomac from Cobb Island to Smith Point-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 5 to 10 kt...increasing to 15 kt with gusts to
20 kt this afternoon. Waves 1 to 2 ft. Scattered showers and tstms
this afternoon.
.TONIGHT...S winds 10 to 15 kt...becoming SW after midnight. Gusts
up to 25 kt. Waves 2 ft. Numerous showers and scattered tstms.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.WED...SW winds around 5 kt...becoming S. Waves 1 ft or less.
.THU...NW winds 5 to 10 kt...becoming NE. Waves 1 ft. A chance of
tstms through the night. A chance of showers.

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

$$

ANZ530-162100-
Chesapeake Bay north of Pooles Island-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 10 kt. Gusts up to 20 kt late this morning and
afternoon. Waves 1 ft. Scattered showers this morning, then showers
and scattered tstms this afternoon.
.TONIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt late. Gusts
up to 20 kt. Waves 1 ft. Showers and scattered tstms.
.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...NW winds around 5 kt. Waves 1 ft or less.
.WED...SW winds around 5 kt. Waves 1 ft or less. A chance of showers
after midnight.
.THU...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.

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

$$

ANZ531-162100-
Chesapeake Bay from Pooles Island to Sandy Point-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 10 to 15 kt. Gusts up to 20 kt... increasing to
25 kt this afternoon. Waves 1 to 2 ft. Numerous showers this
morning, then showers and scattered tstms this afternoon.
.TONIGHT...S winds 10 to 15 kt with gusts to 25 kt... becoming SW
late. Waves 2 to 3 ft. Showers and scattered tstms.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.WED...SW winds around 5 kt...increasing to 5 to 10 kt. Waves 1 ft
or less. A chance of showers after midnight.
.THU...N winds 5 to 10 kt. Waves 1 ft. A chance of showers.

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

$$

ANZ538-162100-
Patapsco River including Baltimore Harbor-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 10 to 15 kt. Gusts up to 20 kt late this morning
and afternoon. Waves 1 ft. Numerous showers with isolated tstms this
morning, then showers and scattered tstms this afternoon.
.TONIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt late. Gusts
up to 20 kt. Waves 1 ft. Showers and scattered tstms.
.MON...W winds 5 to 10 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...NW winds around 5 kt. Waves flat.
.WED...SW winds around 5 kt. Waves 1 ft or less. A chance of showers
after midnight.
.THU...N winds 5 kt. Waves less than 1 ft. A chance of showers. A
chance of tstms through the night.

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

$$

ANZ539-162100-
Chester River to Queenstown MD-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 10 to 15 kt. Gusts up to 25 kt. Waves 1 to 2 ft.
Scattered showers this morning, then showers and scattered tstms
this afternoon.
.TONIGHT...S winds 10 to 15 kt with gusts to 25 kt... becoming SW
late. Waves 2 ft. Showers and scattered tstms.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.WED...SW winds 5 kt. Waves less than 1 ft. A chance of showers
after midnight.
.THU...NW winds 5 kt...becoming NE after midnight. Waves 1 ft. A
chance of showers.

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

$$

ANZ532-162100-
Chesapeake Bay from Sandy Point to North Beach-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 10 to 15 kt...increasing to 20 kt with gusts to
25 kt this afternoon. Waves 1 to 2 ft...building to 3 ft this
afternoon. Scattered showers this morning, then numerous showers and
scattered tstms this afternoon.
.TONIGHT...S winds 15 to 20 kt with gusts to 25 kt... becoming SW
10 to 15 kt with gusts to 20 kt after midnight. Waves 3 ft. Showers
and scattered tstms.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.WED...SW winds 5 to 10 kt...becoming S. Waves 1 ft or less. A
chance of showers after midnight.
.THU...N winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft.
A chance of showers.

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

$$

ANZ540-162100-
Eastern Bay-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 10 to 15 kt. Gusts up to 25 kt. Waves 1 to 2 ft.
Scattered showers this morning, then showers and scattered tstms
this afternoon.
.TONIGHT...S winds 10 to 15 kt with gusts to 25 kt... becoming SW
late. Waves 2 ft. Showers and scattered tstms.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds around 5 kt. Waves flat.
.WED...W winds 5 kt...becoming S. Waves 1 ft or less. A chance of
showers after midnight.
.THU...NW winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft.
A chance of showers.

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

$$

ANZ533-162100-
Chesapeake Bay from North Beach to Drum Point-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 10 to 15 kt...increasing to 20 kt with gusts to
25 kt this afternoon. Waves 1 to 2 ft...building to 3 ft this
afternoon. Isolated showers this morning, then scattered showers and
tstms this afternoon.
.TONIGHT...S winds 15 to 20 kt with gusts to 25 kt... becoming SW
10 to 15 kt with gusts to 20 kt after midnight. Waves 4 ft...
subsiding to 2 ft after midnight. Showers and scattered tstms.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.WED...W winds 5 kt...becoming S. Waves 1 ft or less. A chance of
showers after midnight.
.THU...NW winds 5 to 10 kt...becoming NE. Waves 1 ft. A chance of
showers.

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

$$

ANZ541-162100-
Choptank River to Cambridge MD and the Little Choptank River-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 10 to 15 kt. Gusts up to 25 kt. Waves 1 to 2 ft.
Isolated showers this morning, then scattered showers and tstms this
afternoon.
.TONIGHT...S winds 10 to 15 kt with gusts to 25 kt... becoming SW
late. Waves 2 ft. Showers and scattered tstms.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.WED...W winds 5 kt...becoming S. Waves 1 ft or less. A chance of
showers after midnight.
.THU...NW winds 5 to 10 kt...becoming NE. Waves 1 ft. A chance of
showers.

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

$$

ANZ542-162100-
Patuxent River to Broomes Island MD-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 5 to 10 kt with gusts to 20 kt... increasing to
15 kt with gusts to 20 kt late. Waves 1 ft. Isolated showers this
morning, then scattered showers and tstms this afternoon.
.TONIGHT...S winds 10 to 15 kt with gusts to 25 kt... becoming SW
5 to 10 kt after midnight. Waves 1 ft. Numerous showers and
scattered tstms.
.MON...W winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NW winds 5 kt. Waves less than 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds around 5 kt. Waves 1 ft.
.WED...SW winds 5 kt. Waves less than 1 ft. A chance of showers
after midnight.
.THU...N winds 5 kt. Waves less than 1 ft. A chance of showers.

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

$$

ANZ534-162100-
Chesapeake Bay from Drum Point to Smith Point-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 10 to 15 kt with gusts to 25 kt... increasing to
20 kt with gusts to 25 kt late. Waves 1 to 2 ft...building to 3 ft
this afternoon. Scattered showers and tstms this afternoon.
.TONIGHT...S winds 15 to 20 kt...becoming SW late. Gusts up to
25 kt. Waves 3 ft. Numerous showers and scattered tstms.
.MON...W winds 10 to 15 kt with gusts to 20 kt... becoming NW 5 to
10 kt in the afternoon. Waves 1 to 2 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt. Waves 1 to 2 ft.
.TUE NIGHT...NW winds around 5 kt. Waves 1 ft or less.
.WED...NW 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...W winds 5 to 10 kt...becoming NE. Waves 1 ft. A chance of
showers.

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

$$

ANZ543-162100-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
549 AM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH LATE
TONIGHT...

.TODAY...S winds 10 to 15 kt. Gusts up to 25 kt. Waves 1 to 2 ft.
Scattered showers with isolated tstms this afternoon.
.TONIGHT...S winds 15 to 20 kt...becoming SW late. Gusts up to
25 kt. Waves 2 ft. Numerous showers and scattered tstms.
.MON...W winds 10 to 15 kt...diminishing to 5 to 10 kt in the
afternoon. Gusts up to 20 kt. Waves 1 to 2 ft.
.MON NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.WED...W winds 5 kt...becoming S 10 to 15 kt. Waves 1 ft or less. A
chance of showers after midnight.
.THU...W winds 5 to 10 kt...becoming NE. Waves 1 ft. A chance of
showers.

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

$$