057
FZUS51 KLWX 042336
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
736 PM EDT Thu Sep 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-
736 PM EDT Thu Sep 4 2025

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

A frontal system will approach from the west today before weakening
as it moves through the area tonight. High pressure will briefly
return Friday. A stronger cold front will cross the waters late
Saturday. Strong high pressure will build to the north Sunday and
Monday. Small Craft Advisories may be needed at times from Friday
afternoon through Sunday night.

$$

ANZ535-050800-
Tidal Potomac from Key Bridge to Indian Head-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...S winds 5 to 10 kt. Gusts up to 20 kt until early
morning. Waves 1 ft. A chance of showers and tstms this evening.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 kt. Waves less than 1 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.SAT NIGHT...NW winds 5 kt. Waves less than 1 ft. Showers likely.
.SUN...NW winds 5 kt. Waves less than 1 ft.
.SUN NIGHT...NW winds 5 kt. Waves less than 1 ft.
.MON...N winds around 5 kt. Waves 1 ft.
.TUE...NE winds around 5 kt. Waves 1 ft.

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

$$

ANZ536-050800-
Tidal Potomac from Indian Head to Cobb Island-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. A chance
of showers and tstms this evening.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft. Showers likely.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely with a
chance of tstms.
.SUN...N winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 kt. Waves less than 1 ft.

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

$$

ANZ537-050800-
Tidal Potomac from Cobb Island to Smith Point-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY...

.TONIGHT...S winds 15 kt with gusts to 25 kt. Waves 2 to 3 ft. A
chance of showers and tstms this evening.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 10 to 15 kt. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers.
.SAT NIGHT...SE winds 5 to 10 kt...becoming N after midnight. Waves
1 ft. Showers likely with a chance of tstms.
.SUN...N winds 10 to 15 kt. Waves 2 ft.
.SUN NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ530-050800-
Chesapeake Bay north of Pooles Island-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
A chance of showers and tstms, mainly this evening.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.SUN...NW winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft or less.
.TUE...NE winds 5 to 10 kt. Waves 1 ft or less.

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

$$

ANZ531-050800-
Chesapeake Bay from Pooles Island to Sandy Point-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY...

.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A
chance of showers and tstms this evening.
.FRI...S winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 10 kt. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft. Showers likely.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.SUN...N winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ538-050800-
Patapsco River including Baltimore Harbor-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt... becoming SW
5 kt late. Waves 1 ft. A chance of showers and tstms this evening.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft. Showers likely.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.SUN...NW winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.MON...N winds 5 to 10 kt. Waves 1 ft or less.
.TUE...NE winds 5 kt. Waves flat.

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

$$

ANZ539-050800-
Chester River to Queenstown MD-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
A chance of showers and tstms this evening.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 10 kt. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft. Showers likely.
.SAT NIGHT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely.
.SUN...N winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 to 10 kt. Waves 1 ft or less.

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

$$

ANZ532-050800-
Chesapeake Bay from Sandy Point to North Beach-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY...

.TONIGHT...S winds 15 to 20 kt. Gusts up to 25 kt until early
morning. Waves 2 to 3 ft. A chance of showers and tstms this
evening.
.FRI...S winds 5 to 10 kt. Waves 1 to 2 ft.
.FRI NIGHT...S winds 10 to 15 kt. Waves 2 ft.
.SAT...S winds 10 kt. Waves 2 ft. Showers likely.
.SAT NIGHT...SW winds 5 to 10 kt...becoming NW 10 to 15 kt after
midnight. Waves 1 to 2 ft. Showers likely.
.SUN...N winds 10 to 15 kt. Waves 1 ft.
.SUN NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ540-050800-
Eastern Bay-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...S winds 10 to 15 kt. Gusts up to 25 kt until early
morning. Waves 2 ft. A chance of showers and tstms this evening.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 10 kt. Waves 1 ft.
.SAT...S winds 10 kt. Waves 1 ft. Showers likely.
.SAT NIGHT...SW winds 5 to 10 kt...becoming N after midnight. Waves
1 ft. Showers likely.
.SUN...N winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ533-050800-
Chesapeake Bay from North Beach to Drum Point-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY...

.TONIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.
A chance of showers and tstms this evening.
.FRI...SW winds 10 to 15 kt...becoming S late. Waves 2 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...S winds 10 kt. Waves 2 ft. A chance of showers.
.SAT NIGHT...S winds 10 kt...becoming N after midnight. Waves 2 ft.
Showers likely.
.SUN...N winds 10 to 15 kt. Waves 2 ft.
.SUN NIGHT...N winds 5 to 10 kt. Waves 1 to 2 ft.
.MON...N winds 5 to 10 kt. Waves 1 to 2 ft.
.TUE...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ541-050800-
Choptank River to Cambridge MD and the Little Choptank River-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY...

.TONIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A
chance of showers and tstms this evening.
.FRI...S winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI NIGHT...S winds 10 to 15 kt. Waves 1 ft.
.SAT...S winds 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...S winds 10 kt...becoming N after midnight. Waves 1 ft.
Showers likely.
.SUN...N winds 10 to 15 kt. Waves 1 ft.
.SUN NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ542-050800-
Patuxent River to Broomes Island MD-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY...

.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A
chance of showers and tstms this evening.
.FRI...SW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.SAT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
.SAT NIGHT...S winds 5 to 10 kt...becoming NW after midnight. Waves
1 ft. Showers likely with a chance of tstms.
.SUN...N winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...N winds 5 to 10 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 5 to 10 kt. Waves 1 ft.

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

$$

ANZ534-050800-
Chesapeake Bay from Drum Point to Smith Point-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY...

.TONIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A
chance of showers and tstms this evening.
.FRI...SW winds 10 to 15 kt...becoming S in the afternoon. Gusts up
to 20 kt. Waves 2 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 3 ft.
.SAT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance
of showers.
.SAT NIGHT...S winds 10 to 15 kt...becoming N after midnight. Waves
2 ft. Showers likely with a chance of tstms.
.SUN...N winds 10 to 15 kt. Waves 2 ft. A chance of showers.
.SUN NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.MON...N winds 10 to 15 kt. Waves 1 to 2 ft.
.TUE...NE winds 10 kt. Waves 2 ft.

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

$$

ANZ543-050800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
736 PM EDT Thu Sep 4 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT FRIDAY...

.TONIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.
A chance of showers and tstms this evening.
.FRI...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.SAT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A
chance of showers.
.SAT NIGHT...S winds 10 to 15 kt...becoming NW after midnight. Waves
1 ft. A chance of showers and tstms.
.SUN...N winds 10 to 15 kt. Waves 1 ft. A chance of showers.
.SUN NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.MON...N winds 5 to 10 kt. Waves 1 ft.
.TUE...NE winds 10 kt. Waves 1 ft.

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

$$