973
FZUS51 KLWX 172033
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
433 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.

ANZ500-180800-
433 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.

$$

ANZ535-180800-
Tidal Potomac from Key Bridge to Indian Head-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft.
Isolated showers and tstms.
.TONIGHT...W winds around 5 kt. Waves 1 ft. Scattered showers.
.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.
.THU...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ536-180800-
Tidal Potomac from Indian Head to Cobb Island-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft.
.TONIGHT...SW winds 5 kt. Waves less than 1 ft.
.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.
.THU...NE winds 5 to 10 kt. Waves 1 ft.

$$

ANZ537-180800-
Tidal Potomac from Cobb Island to Smith Point-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...SE winds 10 kt. Waves 1 ft.
.TONIGHT...S winds 5 to 10 kt...becoming W late. Waves 1 ft.
Scattered showers.
.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 10 to 15 kt. Waves 1 to 2 ft.
.THU...N winds 10 to 15 kt. Waves 2 ft.

$$

ANZ530-180800-
Chesapeake Bay north of Pooles Island-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft.
Isolated showers and tstms.
.TONIGHT...W winds 5 kt...becoming N late. Waves 1 ft. Scattered
showers.
.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...NE winds 5 to 10 kt. Waves 1 ft.
.THU...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ531-180800-
Chesapeake Bay from Pooles Island to Sandy Point-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. Isolated
showers and tstms.
.TONIGHT...SW winds 5 to 10 kt...becoming N late. Waves 1 ft.
Scattered showers.
.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 to 2 ft.
.THU...NE winds 10 to 15 kt. Waves 1 to 2 ft.

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

$$

ANZ538-180800-
Patapsco River including Baltimore Harbor-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft.
Isolated showers and tstms.
.TONIGHT...W winds 5 kt. Waves less than 1 ft. Scattered showers.
.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.
.THU...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ539-180800-
Chester River to Queenstown MD-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft.
.TONIGHT...SW winds 5 to 10 kt...becoming NW late. Waves 1 ft.
Scattered showers.
.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 to 10 kt. Waves 1 ft.
.THU...NE winds 5 to 10 kt. Waves 1 ft.

$$

ANZ532-180800-
Chesapeake Bay from Sandy Point to North Beach-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...S winds 5 to 10 kt...becoming NW late. Waves 1 ft.
Scattered showers.
.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 10 to 15 kt. Waves 1 to 2 ft.
.THU...NE winds 10 to 15 kt. Waves 1 to 2 ft.

$$

ANZ540-180800-
Eastern Bay-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...SW winds 5 to 10 kt...becoming NW late. Waves 1 ft.
.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 10 to 15 kt. Waves 1 ft.
.THU...NE winds 10 to 15 kt. Waves 1 ft.

$$

ANZ533-180800-
Chesapeake Bay from North Beach to Drum Point-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...S winds 5 to 10 kt...becoming NW late. Waves 1 ft.
Scattered showers.
.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 10 to 15 kt. Waves 1 to 2 ft.
.THU...NE winds 10 to 15 kt. Waves 1 to 2 ft.

$$

ANZ541-180800-
Choptank River to Cambridge MD and the Little Choptank River-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...S winds 5 to 10 kt...becoming NW late. Waves 1 ft.
Scattered showers.
.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 10 to 15 kt. Waves 1 to 2 ft.
.THU...NE winds 10 to 15 kt. Waves 1 to 2 ft.

$$

ANZ542-180800-
Patuxent River to Broomes Island MD-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...S winds 5 to 10 kt...becoming NW late. Waves 1 ft.
Scattered showers.
.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.
.THU...NE winds 10 to 15 kt...becoming N 5 kt after midnight. Waves
1 ft.

$$

ANZ534-180800-
Chesapeake Bay from Drum Point to Smith Point-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...S winds 10 to 15 kt...becoming W 5 to 10 kt late. Waves
2 ft. Scattered showers. 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 10 to 15 kt. Waves 1 to 2 ft... building to 3 ft
after midnight.
.THU...N winds 15 to 20 kt...becoming NE 10 kt after midnight. Waves
2 to 3 ft.

$$

ANZ543-180800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
433 PM EDT Sun Aug 17 2025

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

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft.
.TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. Scattered showers and
tstms. 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 to 15 kt. Waves 1 to 2 ft.
.THU...NE winds 15 to 20 kt...diminishing to 10 kt after midnight.
Waves 1 to 2 ft.

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

$$