951
FZUS51 KLWX 190237
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1036 PM EDT Fri Jul 18 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.

ANZ500-190800-
1036 PM EDT Fri Jul 18 2025

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

A front stalls across the area today, then returns north as a warm
front on Saturday. A stronger cold front moves through the area
Sunday night. Canadian high pressure builds to the north into early
next week. Daily shower and thunderstorm chances continue through
the weekend, with any stronger thunderstorm posing a risk to
mariners. Small Craft Advisories may be needed Sunday night into
Monday morning.

$$

ANZ535-190800-
Tidal Potomac from Key Bridge to Indian Head-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...Light winds. Waves flat. A chance of showers and
tstms. Patchy fog late this evening. Patchy fog. Vsby 1 NM or less...
increasing to 1 to 3 NM.
.SAT...S winds around 5 kt. Waves 1 ft. Showers likely with a chance
of tstms. Patchy fog. Vsby 1 to 3 NM.
.SAT NIGHT...S winds around 5 kt. Waves 1 ft or less. Showers likely
with a chance of tstms. Vsby 1 NM or less.
.SUN...W winds around 5 kt. Waves 1 ft. A chance of showers and
tstms.
.SUN NIGHT...NW winds 5 kt. Waves less than 1 ft.
.MON...N winds 5 kt. Waves less than 1 ft.
.MON NIGHT...NE winds around 5 kt. Waves 1 ft.
.TUE...E winds around 5 kt. Waves 1 ft.
.WED...S winds around 5 kt. Waves 1 ft.

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

$$

ANZ536-190800-
Tidal Potomac from Indian Head to Cobb Island-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...Light winds. Waves flat. A chance of showers and
tstms. Patchy fog late this evening. Patchy fog. Vsby 1 NM or less...
increasing to 1 to 3 NM.
.SAT...S winds around 5 kt. Waves 1 ft. A chance of showers and
tstms. Patchy fog. Vsby 1 NM or less.
.SAT NIGHT...S winds around 5 kt. Waves 1 ft. A chance of showers
and tstms. Vsby 1 NM or less.
.SUN...W winds around 5 kt. Waves 1 ft. A chance of showers.
.SUN NIGHT...NW winds 5 kt. Waves less than 1 ft.
.MON...N winds 5 kt. Waves less than 1 ft.
.MON NIGHT...NE winds around 5 kt. Waves 1 ft.
.TUE...E winds around 5 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ537-190800-
Tidal Potomac from Cobb Island to Smith Point-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...SW winds 5 kt. Waves flat. A chance of tstms. A
chance of showers late this evening, then showers likely with vsby
1 to 3 NM.
.SAT...S winds around 5 kt. Waves 1 ft or less. A chance of showers
and tstms. Patchy fog. Vsby 1 NM or less.
.SAT NIGHT...S winds 5 kt. Waves less than 1 ft. A chance of showers
and tstms. Vsby 1 NM or less.
.SUN...W winds 5 kt. Waves less than 1 ft. A chance of showers.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NE winds 5 kt. Waves less than 1 ft.
.TUE...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ530-190800-
Chesapeake Bay north of Pooles Island-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...E winds 5 kt. Waves flat. A slight chance of
showers and tstms late this evening, then a chance of showers and
tstms.
.SAT...E winds 5 kt. Waves flat. A chance of showers and tstms. Vsby
1 NM or less.
.SAT NIGHT...S winds 5 kt. Waves flat. A chance of showers and
tstms. Vsby 1 NM or less.
.SUN...W winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.TUE...E winds 5 kt. Waves less than 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft or less.

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

$$

ANZ531-190800-
Chesapeake Bay from Pooles Island to Sandy Point-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...SE winds 5 kt. Waves flat. A chance of showers
with a slight chance of tstms late this evening, then a chance of
showers and tstms with vsby 1 NM or less.
.SAT...SE winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.SAT NIGHT...S winds 5 kt. Waves less than 1 ft. Showers likely with
a chance of tstms.
.SUN...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.TUE...E winds 5 to 10 kt...becoming SE. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ538-190800-
Patapsco River including Baltimore Harbor-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...E winds around 5 kt. Waves flat. A chance of
showers and tstms. Vsby 1 NM or less.
.SAT...E winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SAT NIGHT...S winds around 5 kt. Waves flat. Showers likely with a
chance of tstms.
.SUN...W winds around 5 kt. Waves 1 ft or less. A chance of showers
and tstms.
.SUN NIGHT...NW winds 5 kt. Waves less than 1 ft.
.MON...N winds 5 kt. Waves less than 1 ft.
.MON NIGHT...NE winds 5 kt. Waves flat.
.TUE...SE winds 5 kt. Waves less than 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft or less.

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

$$

ANZ539-190800-
Chester River to Queenstown MD-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...SE winds 5 kt. Waves flat. A chance of showers
and tstms. Vsby 1 NM or less.
.SAT...S winds 5 kt. Waves flat. Showers likely with a chance of
tstms. Patchy fog. Vsby 1 NM or less.
.SAT NIGHT...S winds 5 kt. Waves flat. Showers likely with a chance
of tstms.
.SUN...W winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NE winds 5 kt. Waves less than 1 ft.
.TUE...E winds 5 kt. Waves less than 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ532-190800-
Chesapeake Bay from Sandy Point to North Beach-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...SE winds 5 kt. Waves flat. A chance of showers
and tstms. Vsby 1 NM or less.
.SAT...SE winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms. Patchy fog. Vsby 1 NM or less.
.SAT NIGHT...S winds 5 kt. Waves less than 1 ft. Showers likely with
a chance of tstms. Vsby 1 NM or less.
.SUN...W winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NE winds 5 kt. Waves less than 1 ft.
.TUE...E winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 to 2 ft.

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

$$

ANZ540-190800-
Eastern Bay-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...SE winds 5 kt. Waves flat. A chance of showers
and tstms. Vsby 1 NM or less.
.SAT...S winds 5 kt. Waves flat. Showers likely with a chance of
tstms. Vsby 1 NM or less.
.SAT NIGHT...S winds 5 kt. Waves flat. Showers likely with a chance
of tstms.
.SUN...W winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NE winds 5 kt. Waves less than 1 ft.
.TUE...E winds 5 kt. Waves less than 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ533-190800-
Chesapeake Bay from North Beach to Drum Point-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...SW winds 5 kt. Waves flat. A chance of showers
and tstms late this evening, then showers likely with a chance of
tstms. Vsby 1 NM or less late this evening.
.SAT...S winds 5 kt. Waves less than 1 ft. Showers likely with a
chance of tstms. Patchy fog. Vsby 1 NM or less.
.SAT NIGHT...S winds 5 kt. Waves less than 1 ft. Showers likely with
a chance of tstms. Vsby 1 NM or less.
.SUN...W winds 5 kt. Waves less than 1 ft. A chance of showers.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NE winds 5 kt. Waves less than 1 ft.
.TUE...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 to 2 ft.

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

$$

ANZ541-190800-
Choptank River to Cambridge MD and the Little Choptank River-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...SE winds 5 kt. Waves flat. A chance of showers
and tstms. Vsby 1 NM or less.
.SAT...S winds 5 kt. Waves flat. Showers likely with a chance of
tstms. Patchy fog. Vsby 1 NM or less.
.SAT NIGHT...S winds 5 kt. Waves less than 1 ft. Showers likely with
a chance of tstms. Vsby 1 NM or less.
.SUN...W winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NE winds 5 kt. Waves less than 1 ft.
.TUE...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft
or less.
.WED...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ542-190800-
Patuxent River to Broomes Island MD-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...Light winds. Waves 1 ft. A chance of tstms. A
chance of showers late this evening, then showers likely.
.SAT...S winds around 5 kt. Waves 1 ft. A chance of showers and
tstms. Patchy fog.
.SAT NIGHT...S winds around 5 kt. Waves 1 ft. Showers and tstms
likely.
.SUN...W winds 5 kt. Waves less than 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.MON NIGHT...NE winds around 5 kt. Waves 1 ft.
.TUE...E winds 5 kt. Waves less than 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ534-190800-
Chesapeake Bay from Drum Point to Smith Point-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...SW winds 5 kt. Waves flat. A chance of tstms. A
chance of showers late this evening, then showers likely.
.SAT...S winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms. Patchy fog. Vsby 1 NM or less.
.SAT NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms. Vsby 1 NM or less.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 to 2 ft.
.MON...N winds 5 to 10 kt. Waves 1 to 2 ft.
.MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.TUE...E winds 5 to 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 to 2 ft.

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

$$

ANZ543-190800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1036 PM EDT Fri Jul 18 2025

.REST OF TONIGHT...S winds 5 kt. Waves flat. A chance of tstms. A
chance of showers late this evening, then showers likely. Patchy
fog.
.SAT...S winds 5 kt. Waves less than 1 ft. A chance of showers and
tstms. Patchy fog.
.SAT NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms. Vsby 1 NM or less.
.SUN...W winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 10 kt. Waves 1 ft.
.MON NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.TUE...E winds 5 to 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.

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

$$