147
FZUS51 KLWX 121735
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1235 PM EST Wed Nov 12 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.

ANZ500-130900-
1235 PM EST Wed Nov 12 2025

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

Surface high pressure builds well to the south this afternoon while
a progressive clipper-like system crosses the waters this  evening.
High pressure returns by Friday into the first half of the  weekend.
A warm front crosses the region by late Saturday with the  attendant
cold front moving through on Sunday. Small Craft  Advisories will
likely need to be extended through Thursday night,  with additional
advisories potentially needed during portions of  the weekend.

$$

ANZ535-130900-
Tidal Potomac from Key Bridge to Indian Head-
1235 PM EST Wed Nov 12 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EST THIS EVENING...

.THIS AFTERNOON...W winds 10 kt with gusts to 30 kt. Waves 1 ft.
.TONIGHT...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.THU...W winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt
in the afternoon. Waves 1 ft.
.THU NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds around 5 kt. Waves 1 ft.
.SAT...SE winds around 5 kt...becoming S 10 to 15 kt. Waves 1 ft. A
chance of rain after midnight.
.SUN...W winds 15 to 20 kt...diminishing to 10 kt after midnight.
Waves 1 to 2 ft.

$$

ANZ536-130900-
Tidal Potomac from Indian Head to Cobb Island-
1235 PM EST Wed Nov 12 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EST THIS EVENING...

.THIS AFTERNOON...W winds 15 kt with gusts to 30 kt. Waves 2 ft.
.TONIGHT...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.THU...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.THU NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 kt. Waves less than 1 ft.
.SAT...SE winds around 5 kt...becoming SW 15 to 20 kt. Waves 1 to
2 ft. A chance of rain after midnight.
.SUN...W winds 15 to 20 kt. Waves 2 to 3 ft...subsiding to 1 ft
after midnight.

$$

ANZ537-130900-
Tidal Potomac from Cobb Island to Smith Point-
1235 PM EST Wed Nov 12 2025

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

.THIS AFTERNOON...SW winds 15 to 20 kt with gusts to 25 kt. Waves
2 to 3 ft.
.TONIGHT...W winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.THU...NW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...NW winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...NE winds 5 to 10 kt...becoming S 15 to 20 kt. Waves 1 to
2 ft. A chance of rain after midnight.
.SUN...W winds 15 to 20 kt...becoming NW. Waves 2 ft.

$$

ANZ530-130900-
Chesapeake Bay north of Pooles Island-
1235 PM EST Wed Nov 12 2025

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

.THIS AFTERNOON...W winds 15 kt with gusts to 25 kt. Waves 2 ft.
.TONIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.THU...W winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft.
.THU NIGHT...NW winds 10 to 15 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...W winds 5 kt...becoming S 10 to 15 kt. Waves 1 to 2 ft. A
chance of rain in the evening. Rain likely after midnight.
.SUN...W winds 15 to 20 kt. Waves 2 ft. A chance of rain in the
morning.

$$

ANZ531-130900-
Chesapeake Bay from Pooles Island to Sandy Point-
1235 PM EST Wed Nov 12 2025

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

.THIS AFTERNOON...W winds 15 to 20 kt with gusts to 25 kt. Waves
3 ft.
.TONIGHT...W winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.THU...W winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.FRI...W winds 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...N winds 5 kt...becoming SW 15 to 20 kt. Waves 1 to 2 ft. A
chance of rain in the evening. Rain likely after midnight.
.SUN...W winds 20 to 25 kt. Waves 3 ft.

$$

ANZ538-130900-
Patapsco River including Baltimore Harbor-
1235 PM EST Wed Nov 12 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EST THIS EVENING...

.THIS AFTERNOON...W winds 15 kt with gusts to 25 kt. Waves 1 ft.
.TONIGHT...W winds 10 kt with gusts to 20 kt. Waves 1 ft.
.THU...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.THU NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 kt. Waves less than 1 ft.
.SAT...W winds 5 kt...becoming S. Waves 1 ft or less. A chance of
rain in the evening. Rain likely after midnight.
.SUN...W winds 10 to 15 kt. Waves 1 ft.

$$

ANZ539-130900-
Chester River to Queenstown MD-
1235 PM EST Wed Nov 12 2025

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

.THIS AFTERNOON...W winds 15 kt with gusts to 25 kt. Waves 2 ft.
.TONIGHT...W winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.THU...W winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...NW winds 10 to 15 kt. Waves 2 ft.
.FRI...W winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...W winds 5 kt...becoming S 10 to 15 kt. Waves 1 to 2 ft. A
chance of rain through the night.
.SUN...W winds 15 to 20 kt. Waves 2 to 3 ft.

$$

ANZ532-130900-
Chesapeake Bay from Sandy Point to North Beach-
1235 PM EST Wed Nov 12 2025

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

.THIS AFTERNOON...W winds 15 to 20 kt with gusts to 25 kt. Waves
3 ft.
.TONIGHT...W winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU...W winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to
2 ft.
.FRI...NW winds 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...N winds 5 to 10 kt...becoming S in the afternoon, then
increasing to 15 to 20 kt. Waves 1 to 2 ft... building to 3 ft after
midnight. A chance of rain through the night.
.SUN...W winds 20 to 25 kt. Waves 3 ft.

$$

ANZ540-130900-
Eastern Bay-
1235 PM EST Wed Nov 12 2025

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

.THIS AFTERNOON...W winds 15 kt with gusts to 25 kt. Waves 2 ft.
.TONIGHT...W winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.THU...W winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...N winds 5 kt...becoming SW 15 to 20 kt. Waves 1 to 2 ft. A
chance of rain through the night.
.SUN...W winds 15 to 20 kt. Waves 2 ft.

$$

ANZ533-130900-
Chesapeake Bay from North Beach to Drum Point-
1235 PM EST Wed Nov 12 2025

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

.THIS AFTERNOON...W winds 15 to 20 kt with gusts to 30 kt. Waves
3 ft.
.TONIGHT...W winds 15 to 20 kt with gusts to 30 kt. Waves 2 to 3 ft.
.THU...W winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...N winds 5 to 10 kt...becoming S in the afternoon, then
becoming SW 15 to 20 kt. Waves 1 to 2 ft... building to 3 ft after
midnight. A chance of rain through the night.
.SUN...W winds 20 to 25 kt...becoming NW. Waves 3 ft.

$$

ANZ541-130900-
Choptank River to Cambridge MD and the Little Choptank River-
1235 PM EST Wed Nov 12 2025

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

.THIS AFTERNOON...W winds 15 to 20 kt with gusts to 25 kt. Waves
2 to 3 ft.
.TONIGHT...W winds 15 to 20 kt with gusts to 30 kt. Waves 2 to 3 ft.
.THU...NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.THU NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...N winds 5 to 10 kt...becoming SW in the afternoon, then
becoming S 15 to 20 kt. Waves 1 to 2 ft. A chance of rain through
the night.
.SUN...W winds 20 to 25 kt...becoming NW. Waves 3 ft.

$$

ANZ542-130900-
Patuxent River to Broomes Island MD-
1235 PM EST Wed Nov 12 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EST THIS EVENING...

.THIS AFTERNOON...W winds 15 kt with gusts to 25 kt. Waves 1 ft.
.TONIGHT...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
.THU...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.THU NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 kt. Waves less than 1 ft.
.SAT...N winds 5 kt...becoming S 10 to 15 kt. Waves 1 ft. A chance
of rain after midnight.
.SUN...W winds 10 to 15 kt...becoming NW. Waves 1 ft.

$$

ANZ534-130900-
Chesapeake Bay from Drum Point to Smith Point-
1235 PM EST Wed Nov 12 2025

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

.THIS AFTERNOON...SW winds 20 kt with gusts to 30 kt. Waves 4 ft.
.TONIGHT...W winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.
.THU...NW winds 15 to 20 kt. Gusts up to 30 kt... diminishing to
25 kt in the late morning and afternoon. Waves 3 ft.
.THU NIGHT...NW winds 15 to 20 kt. Waves 3 ft.
.FRI...NW winds 10 to 15 kt. Waves 2 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 to 2 ft.
.SAT...N winds 5 to 10 kt...becoming S in the afternoon, then
becoming SW 20 to 25 kt. Waves 1 ft... building to 3 ft. A chance of
rain after midnight.
.SUN...SW winds 20 to 25 kt...becoming NW. Waves 3 ft.

$$

ANZ543-130900-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1235 PM EST Wed Nov 12 2025

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

.THIS AFTERNOON...W winds 20 kt with gusts to 30 kt. Waves 2 ft.
.TONIGHT...W winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
.THU...NW winds 15 to 20 kt. Gusts up to 30 kt... diminishing to
20 kt late. Waves 2 ft.
.THU NIGHT...NW winds 15 to 20 kt. Waves 2 ft.
.FRI...NW winds 10 to 15 kt. Waves 1 ft.
.FRI NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...N winds 5 to 10 kt...becoming SW in the afternoon, then
increasing to 20 to 25 kt. Waves 1 to 2 ft. A chance of rain after
midnight.
.SUN...SW winds 20 kt...becoming NW. Waves 2 to 3 ft.

$$