021
FZUS51 KLWX 042058
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
458 PM EDT Fri Jul 4 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.

ANZ500-050800-
458 PM EDT Fri Jul 4 2025

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

High pressure will build across the area this holiday weekend, while
 low pressure develops off the southeastern U.S. coast. A cold front
 will approach the waters from the northwest early next week before
eventually stalling nearby. Small Craft Advisories may be needed
Sunday night.

$$

ANZ535-050800-
Tidal Potomac from Key Bridge to Indian Head-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...E winds around 5 kt. Waves 1 ft or less.
.SAT...S winds around 5 kt. Waves 1 ft.
.SAT NIGHT...S winds around 5 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...S winds around 5 kt. Waves 1 ft. A chance of showers and
tstms through the night.
.TUE...NW winds around 5 kt. Waves 1 ft. A chance of showers and
tstms through the night.

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

$$

ANZ536-050800-
Tidal Potomac from Indian Head to Cobb Island-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds around 5 kt. Waves 1 ft or less.
.SAT...S winds around 5 kt. Waves 1 ft.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds around 5 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...S winds around 5 kt. Waves 1 ft. A chance of showers and
tstms through the night.
.TUE...W winds around 5 kt. Waves 1 ft. A chance of showers and
tstms through the night.

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

$$

ANZ537-050800-
Tidal Potomac from Cobb Island to Smith Point-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds around 5 kt. Waves 1 ft or less.
.SAT...S winds around 5 kt...becoming SE in the afternoon. Waves
1 ft or less.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance
of tstms through the night.
.TUE...SW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms through the night.

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

$$

ANZ530-050800-
Chesapeake Bay north of Pooles Island-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...NE winds around 5 kt. Waves flat.
.SAT...S winds around 5 kt. Waves flat.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft or less.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...S winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms through the night.
.TUE...NW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms through the night.

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

$$

ANZ531-050800-
Chesapeake Bay from Pooles Island to Sandy Point-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...E winds around 5 kt. Waves 1 ft or less.
.SAT...SE winds around 5 kt. Waves 1 ft or less.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms
through the night.
.TUE...W winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms through the night.

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

$$

ANZ538-050800-
Patapsco River including Baltimore Harbor-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...NE winds 5 kt. Waves flat.
.TONIGHT...NE winds around 5 kt. Waves flat.
.SAT...SE winds around 5 kt. Waves 1 ft or less.
.SAT NIGHT...S winds 5 kt. Waves less than 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft or less.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...S winds 5 to 10 kt. Waves 1 ft or less. A chance of showers
and tstms through the night.
.TUE...W winds around 5 kt. Waves flat. A chance of showers and
tstms through the night.

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

$$

ANZ539-050800-
Chester River to Queenstown MD-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...E winds around 5 kt. Waves flat.
.SAT...S winds around 5 kt. Waves 1 ft or less.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 kt. Waves less than 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...S winds 5 kt. Waves less than 1 ft. A chance of showers. A
chance of tstms through the night.
.TUE...W winds around 5 kt. Waves 1 ft or less. A chance of showers
and tstms through the night.

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

$$

ANZ532-050800-
Chesapeake Bay from Sandy Point to North Beach-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...NE winds 5 kt. Waves less than 1 ft.
.TONIGHT...E winds around 5 kt. Waves 1 ft or less.
.SAT...S winds 5 to 10 kt. Waves 1 ft or less.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft.
.MON...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance
of tstms through the night.
.TUE...SW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms through the night.

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

$$

ANZ540-050800-
Eastern Bay-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...E winds around 5 kt. Waves flat.
.SAT...S winds around 5 kt. Waves 1 ft or less.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft or less.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance
of tstms through the night.
.TUE...W winds 5 kt. Waves flat. A chance of showers and tstms
through the night.

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

$$

ANZ533-050800-
Chesapeake Bay from North Beach to Drum Point-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds around 5 kt. Waves 1 ft or less.
.SAT...S winds 5 to 10 kt. Waves 1 ft or less.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft.
.MON...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance
of tstms through the night.
.TUE...SW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms through the night.

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

$$

ANZ541-050800-
Choptank River to Cambridge MD and the Little Choptank River-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...E winds around 5 kt. Waves 1 ft or less.
.SAT...S winds around 5 kt. Waves 1 ft or less.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft or less.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance
of tstms through the night.
.TUE...SW winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms through the night.

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

$$

ANZ542-050800-
Patuxent River to Broomes Island MD-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...N winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds around 5 kt. Waves 1 ft.
.SAT...S winds around 5 kt...becoming SE late. Waves 1 ft.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.MON...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance
of tstms through the night.
.TUE...SW winds around 5 kt. Waves 1 ft. A chance of showers and
tstms through the night.

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

$$

ANZ534-050800-
Chesapeake Bay from Drum Point to Smith Point-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...N winds 10 kt. Waves 1 ft.
.TONIGHT...SE winds 5 kt. Waves less than 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft or less.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft.
.SUN...S winds 5 to 10 kt. Waves 1 to 2 ft.
.SUN NIGHT...S winds 10 to 15 kt. Waves 2 ft.
.MON...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance
of tstms through the night.
.TUE...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms through the night.

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

$$

ANZ543-050800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
458 PM EDT Fri Jul 4 2025

.REST OF THIS AFTERNOON...NW winds 10 kt. Waves 1 ft.
.TONIGHT...N winds 5 to 10 kt...becoming SE in the late evening and
overnight. Waves 1 ft or less.
.SAT...S winds 5 to 10 kt. Waves 1 ft or less.
.SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 10 to 15 kt. Waves 1 ft.
.MON...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.TUE...SW winds 5 to 10 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.

$$