068
FZUS51 KLWX 172126
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
526 PM EDT Sun Aug 17 2025

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.

ANZ500-180900-
526 PM EDT Sun Aug 17 2025

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

A cold front will push south through the area tonight into Monday
morning. This frontal zone will stall just south of the waters
through Wednesday before dropping farther southward Thursday. Small
Craft Advisory conditions may linger into Tuesday for portions of
the waters. As Hurricane Erin passes well to the east, Small Craft
Advisories may be needed late Wednesday into Thursday. Please see
National Hurricane Center products for the latest information on
Erin.

$$

ANZ535-180900-
Tidal Potomac from Key Bridge to Indian Head-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY
AFTERNOON...

.TONIGHT...W winds 5 kt. Waves less than 1 ft. Scattered showers
with isolated tstms this evening.
.MON...NE winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A chance
of showers.
.MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.TUE...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...NE winds around 5 kt. Waves 1 ft.
.WED NIGHT...NE winds 5 kt. Waves less than 1 ft.
.THU...NE winds 5 to 10 kt. Waves 1 ft.
.FRI...SE winds around 5 kt. Waves 1 ft.

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

$$

ANZ536-180900-
Tidal Potomac from Indian Head to Cobb Island-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY
AFTERNOON...

.TONIGHT...SW winds 5 kt. Waves less than 1 ft. Isolated showers and
tstms this evening.
.MON...N winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.TUE...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...NE winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.THU...NE winds 5 to 10 kt. Waves 1 ft.
.FRI...SE winds 5 kt. Waves less than 1 ft.

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

$$

ANZ537-180900-
Tidal Potomac from Cobb Island to Smith Point-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE
MONDAY NIGHT...

.TONIGHT...S winds 10 kt...becoming W late. Waves 1 ft. Scattered
showers with isolated tstms.
.MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of showers.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 to
3 ft. A chance of showers.
.TUE...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance
of showers.
.TUE NIGHT...E winds 10 to 15 kt. Waves 2 ft.
.WED...NE winds 5 to 10 kt. Waves 1 to 2 ft.
.WED NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.THU...N winds 10 to 15 kt. Waves 2 ft.
.FRI...NE winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$

ANZ530-180900-
Chesapeake Bay north of Pooles Island-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE
MONDAY NIGHT...

.TONIGHT...W winds 5 kt...becoming N late. Waves 1 ft. Scattered
showers with isolated tstms this evening.
.MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.MON NIGHT...E winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers.
.TUE...E winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...E winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.THU...NE winds 5 to 10 kt. Waves 1 ft.
.FRI...E winds 5 kt...becoming S. Waves 1 ft.

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

$$

ANZ531-180900-
Chesapeake Bay from Pooles Island to Sandy Point-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE
MONDAY NIGHT...

.TONIGHT...S winds 10 kt...becoming NW after midnight. Waves 1 ft.
Scattered showers with isolated tstms this evening.
.MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers.
.TUE...E winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...NE winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...NE winds 10 kt. Waves 1 to 2 ft.
.THU...NE winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI...E winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$

ANZ538-180900-
Patapsco River including Baltimore Harbor-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY
AFTERNOON...

.TONIGHT...W winds 5 kt. Waves less than 1 ft. Scattered showers
with isolated tstms this evening.
.MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.TUE...E winds 10 kt. Waves 1 ft. A chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...NE winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.THU...NE winds 5 to 10 kt. Waves 1 ft.
.FRI...SE winds 5 kt. Waves less than 1 ft.

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

$$

ANZ539-180900-
Chester River to Queenstown MD-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE
MONDAY NIGHT...

.TONIGHT...SW winds 5 kt...becoming NW late. Waves 1 ft. Scattered
showers with isolated tstms this evening.
.MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
.MON NIGHT...NE winds 10 kt. Waves 1 ft. A chance of showers.
.TUE...E winds 10 kt. Waves 1 ft. A chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...NE winds 5 kt. Waves less than 1 ft.
.WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.THU...NE winds 5 to 10 kt. Waves 1 ft.
.FRI...NE winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$

ANZ532-180900-
Chesapeake Bay from Sandy Point to North Beach-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE
MONDAY NIGHT...

.TONIGHT...S winds 10 kt...becoming NW late. Waves 1 ft. Scattered
showers with isolated tstms this evening.
.MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers.
.TUE...E winds 10 to 15 kt. Waves 2 ft. A chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 to 2 ft.
.WED...NE winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.THU...NE winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI...E winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$

ANZ540-180900-
Eastern Bay-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE
MONDAY NIGHT...

.TONIGHT...S winds 10 kt...becoming W after midnight. Waves 1 ft.
Isolated showers and tstms this evening.
.MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers.
.TUE...E winds 10 kt. Waves 1 ft. A chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...NE winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.THU...NE winds 10 to 15 kt. Waves 1 ft.
.FRI...NE winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$

ANZ533-180900-
Chesapeake Bay from North Beach to Drum Point-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE
MONDAY NIGHT...

.TONIGHT...S winds 10 kt...becoming NW late. Waves 1 ft. Scattered
showers with isolated tstms this evening.
.MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 to
3 ft. A chance of showers.
.TUE...E winds 10 to 15 kt. Waves 2 ft.
.TUE NIGHT...E winds 5 to 10 kt. Waves 2 ft.
.WED...NE winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.THU...NE winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI...NE winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$

ANZ541-180900-
Choptank River to Cambridge MD and the Little Choptank River-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH LATE
MONDAY NIGHT...

.TONIGHT...S winds 10 kt...becoming NW late. Waves 1 ft. Scattered
showers with isolated tstms this evening.
.MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers.
.TUE...E winds 10 to 15 kt. Waves 1 ft. A chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...NE winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.THU...NE winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI...NE winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$

ANZ542-180900-
Patuxent River to Broomes Island MD-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY
AFTERNOON...

.TONIGHT...S winds 5 to 10 kt...becoming NW late. Waves 1 ft.
Isolated tstms. Scattered showers, mainly this evening.
.MON...NE winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 ft. A chance
of showers.
.MON NIGHT...NE winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers.
.TUE...E winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Waves 1 ft.
.WED...NE winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...NE winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.THU...NE winds 10 to 15 kt...becoming N 5 kt after midnight. Waves
1 ft.
.FRI...NE winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$

ANZ534-180900-
Chesapeake Bay from Drum Point to Smith Point-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE
MONDAY NIGHT...

.TONIGHT...S winds 10 to 15 kt...becoming W late. Waves 1 to 2 ft.
Scattered showers with isolated tstms this evening, then scattered
showers and tstms after midnight with vsby 1 NM or less.
.MON...NE winds 10 to 15 kt with gusts to 25 kt. Waves 2 to 3 ft. A
chance of showers.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 3 ft. A
chance of showers.
.TUE...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance
of showers.
.TUE NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.WED...NE winds 5 to 10 kt. Gusts up to 20 kt in the afternoon.
Waves 1 to 2 ft.
.WED NIGHT...NE winds 10 to 15 kt with gusts to 25 kt. Waves 2 to
3 ft.
.THU...N winds 15 to 20 kt...becoming NE 10 kt after midnight. Waves
2 to 3 ft.
.FRI...NE winds 5 to 10 kt...becoming S. Waves 1 to 2 ft.

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

$$

ANZ543-180900-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
526 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY AFTERNOON THROUGH LATE
MONDAY NIGHT...

.TONIGHT...S winds 10 kt...becoming W late. Waves 1 ft. Scattered
showers with isolated tstms this evening, then scattered showers and
tstms after midnight with vsby 1 NM or less.
.MON...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of showers.
.MON NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers.
.TUE...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance
of showers.
.TUE NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.WED...NE winds 10 kt. Gusts up to 20 kt in the afternoon. Waves
1 ft.
.WED NIGHT...NE winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.THU...NE winds 15 to 20 kt...diminishing to 10 kt after midnight.
Waves 1 to 2 ft.
.FRI...N winds 5 to 10 kt...becoming SE. Waves 1 ft.

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

$$