516
FZUS51 KLWX 302034
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
434 PM EDT Mon Jun 30 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.

ANZ500-010800-
434 PM EDT Mon Jun 30 2025

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

A cold front will approach the water on Tuesday, and eventually
move through Tuesday night. High pressure will build in for the
middle to end of the week. Small Craft Advisories may be needed on
Tuesday. Special Marine Warnings are possible with thunderstorms
during the late afternoon and evening hours each day through
Tuesday.

$$

ANZ535-010800-
Tidal Potomac from Key Bridge to Indian Head-
434 PM EDT Mon Jun 30 2025

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. Numerous
showers and tstms. Vsby 1 NM or less.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Numerous showers and
tstms. Vsby 1 NM or less.
.TUE...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. Showers
with tstms likely. Vsby 1 NM or less.
.TUE NIGHT...SW winds around 5 kt. Waves 1 ft. Showers with tstms
likely.
.WED...W winds around 5 kt. Waves 1 ft.
.WED NIGHT...SW winds around 5 kt. Waves 1 ft or less.
.THU...NW winds around 5 kt. Waves 1 ft.
.FRI...W winds around 5 kt. Waves 1 ft or less.

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

$$

ANZ536-010800-
Tidal Potomac from Indian Head to Cobb Island-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. Numerous
showers with a chance of tstms.
.TONIGHT...S winds 5 to 10 kt. Gusts up to 20 kt after midnight.
Waves 1 ft. Numerous showers and scattered tstms.
.TUE...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. Showers
and tstms likely. Vsby 1 NM or less.
.TUE NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the evening.
Waves 1 ft. Showers with tstms likely.
.WED...W winds around 5 kt. Waves 1 ft.
.WED NIGHT...SW winds around 5 kt. Waves 1 ft or less.
.THU...NW winds around 5 kt. Waves 1 ft.
.FRI...NE winds around 5 kt. Waves 1 ft or less.

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

$$

ANZ537-010800-
Tidal Potomac from Cobb Island to Smith Point-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. Showers likely
with scattered tstms.
.TONIGHT...S winds 10 to 15 kt. Gusts up to 25 kt after midnight.
Waves 1 to 2 ft. Scattered showers and tstms.
.TUE...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.TUE NIGHT...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 to
2 ft. Showers with tstms likely.
.WED...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED NIGHT...SW winds around 5 kt. Waves flat.
.THU...NW winds 5 kt. Waves less than 1 ft.
.FRI...N winds 5 to 10 kt...becoming S. Waves 1 ft or less.

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

$$

ANZ530-010800-
Chesapeake Bay north of Pooles Island-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...SW winds 10 kt. Waves 1 ft. Scattered
showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt after midnight.
Waves 1 ft. A chance of showers and tstms.
.TUE...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
Showers with tstms likely. Vsby 1 NM or less.
.TUE NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers with tstms
likely.
.WED...W winds 5 kt. Waves less than 1 ft.
.WED NIGHT...W winds around 5 kt. Waves 1 ft.
.THU...NW winds 5 kt. Waves less than 1 ft.
.FRI...N winds around 5 kt. Waves 1 ft.

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

$$

ANZ531-010800-
Chesapeake Bay from Pooles Island to Sandy Point-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. Scattered
showers and tstms. Vsby 1 NM or less.
.TONIGHT...S winds 5 to 10 kt. Gusts up to 20 kt after midnight.
Waves 1 to 2 ft. A chance of showers and tstms. Vsby 1 NM or less.
.TUE...SW winds 10 kt with gusts to 20 kt. Waves 2 ft. Showers with
tstms likely. Vsby 1 NM or less.
.TUE NIGHT...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Showers and tstms likely.
.WED...W winds 5 kt. Waves less than 1 ft.
.WED NIGHT...SW winds 5 kt. Waves flat.
.THU...NW winds 5 kt. Waves less than 1 ft.
.FRI...NE winds 5 kt. Waves less than 1 ft.

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

$$

ANZ538-010800-
Patapsco River including Baltimore Harbor-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. Showers and
tstms likely. Vsby 1 NM or less.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms. Vsby 1 NM or less.
.TUE...SW winds 5 to 10 kt. Waves 1 ft. Showers with tstms likely.
Vsby 1 NM or less.
.TUE NIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. Showers and
tstms likely.
.WED...W winds 5 kt. Waves flat.
.WED NIGHT...SW winds around 5 kt. Waves flat.
.THU...NW winds around 5 kt. Waves flat.
.FRI...N winds around 5 kt. Waves flat.

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

$$

ANZ539-010800-
Chester River to Queenstown MD-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. Showers and
tstms likely.
.TONIGHT...S winds 5 to 10 kt. Gusts up to 20 kt after midnight.
Waves 1 to 2 ft. Numerous showers with a chance of tstms.
.TUE...SW winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers
with tstms likely. Vsby 1 NM or less.
.TUE NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers with tstms
likely.
.WED...W winds 5 kt. Waves less than 1 ft.
.WED NIGHT...SW winds around 5 kt. Waves flat.
.THU...NW winds around 5 kt. Waves 1 ft or less.
.FRI...NW winds around 5 kt. Waves 1 ft or less.

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

$$

ANZ532-010800-
Chesapeake Bay from Sandy Point to North Beach-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 15 kt with gusts to 20 kt. Waves
2 ft. Numerous showers and scattered tstms.
.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Numerous showers with a chance of tstms.
.TUE...SW winds 10 kt with gusts to 20 kt. Waves 2 ft. Showers and
tstms likely. Vsby 1 NM or less.
.TUE NIGHT...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Showers with tstms likely.
.WED...SW winds 5 kt. Waves less than 1 ft.
.WED NIGHT...SW winds 5 kt. Waves flat.
.THU...NW winds 5 kt. Waves less than 1 ft.
.FRI...E winds 5 kt. Waves less than 1 ft.

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

$$

ANZ540-010800-
Eastern Bay-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. Numerous
showers and scattered tstms.
.TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt after midnight.
Waves 1 to 2 ft. Numerous showers with a chance of tstms.
.TUE...SW winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers
and tstms likely. Vsby 1 NM or less.
.TUE NIGHT...W winds 5 to 10 kt. Waves 1 ft. Showers with tstms
likely.
.WED...W winds 5 kt. Waves less than 1 ft. A chance of showers.
.WED NIGHT...SW winds around 5 kt. Waves flat.
.THU...NW winds 5 kt. Waves less than 1 ft.
.FRI...W winds around 5 kt. Waves 1 ft or less.

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

$$

ANZ533-010800-
Chesapeake Bay from North Beach to Drum Point-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 15 kt with gusts to 20 kt. Waves
2 ft. Numerous showers and scattered tstms.
.TONIGHT...S winds 10 to 15 kt...becoming SW late. Gusts up to
20 kt...increasing to 25 kt after midnight. Waves 2 ft. Numerous
showers and scattered tstms.
.TUE...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.TUE NIGHT...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 to
2 ft. Showers with tstms likely.
.WED...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED NIGHT...SW winds 5 kt. Waves flat.
.THU...NW winds 5 to 10 kt. Waves 1 ft or less.
.FRI...N winds 5 to 10 kt...becoming S. Waves 1 ft or less.

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

$$

ANZ541-010800-
Choptank River to Cambridge MD and the Little Choptank River-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. Numerous
showers and scattered tstms.
.TONIGHT...S winds 10 to 15 kt. Gusts up to 25 kt after midnight.
Waves 1 to 2 ft. Numerous showers with a chance of tstms.
.TUE...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.TUE NIGHT...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Showers with tstms likely.
.WED...W winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.WED NIGHT...SW winds around 5 kt. Waves flat.
.THU...NW winds 5 kt. Waves less than 1 ft.
.FRI...N winds 5 to 10 kt...becoming S. Waves 1 ft or less.

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

$$

ANZ542-010800-
Patuxent River to Broomes Island MD-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. Numerous
showers and scattered tstms.
.TONIGHT...S winds 5 to 10 kt. Gusts up to 20 kt after midnight.
Waves 1 ft. Numerous showers and scattered tstms.
.TUE...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. A chance of
showers and tstms. Vsby 1 NM or less.
.TUE NIGHT...W winds 5 to 10 kt. Waves 1 ft. Showers with tstms
likely.
.WED...W winds 5 kt. Waves less than 1 ft. A chance of showers.
.WED NIGHT...SW winds around 5 kt. Waves 1 ft.
.THU...NW winds around 5 kt. Waves 1 ft.
.FRI...E winds around 5 kt. Waves 1 ft.

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

$$

ANZ534-010800-
Chesapeake Bay from Drum Point to Smith Point-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 15 kt with gusts to 20 kt. Waves
2 ft. Scattered showers and tstms.
.TONIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.
Scattered showers and tstms. Vsby 1 NM or less.
.TUE...SW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.TUE NIGHT...SW winds 10 kt with gusts to 20 kt. Waves 2 ft. Showers
with tstms likely.
.WED...SW winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers and
tstms.
.WED NIGHT...SW winds 5 kt. Waves less than 1 ft.
.THU...NW winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$

ANZ543-010800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
434 PM EDT Mon Jun 30 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF THIS AFTERNOON...S winds 15 kt with gusts to 20 kt. Waves
1 ft. Scattered showers and tstms.
.TONIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
Scattered showers and tstms.
.TUE...SW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A
chance of showers and tstms. Vsby 1 NM or less.
.TUE NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft. Showers with tstms likely.
.WED...W winds 5 to 10 kt. Waves 1 ft. A chance of showers and
tstms.
.WED NIGHT...SW winds 5 kt. Waves less than 1 ft.
.THU...W winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt...becoming S. Waves 1 ft.

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

$$