237
FZUS51 KLWX 151457
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1057 AM EDT Tue Sep 15 2026

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.

ANZ500-152000-
1057 AM EDT Tue Sep 15 2026

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

Canadian high pressure will remain over the northeastern U.S.
through the middle of the week. Another cold front is expected to
near the region by Friday morning before high pressure builds in
from the northwest into the weekend. Small Craft Advisories may be
needed at times on Thursday due to southerly channeling effects.

$$

ANZ535-152000-
Tidal Potomac from Key Bridge to Indian Head-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...SE winds 5 kt. Waves less than 1 ft.
.TONIGHT...S winds around 5 kt. Waves 1 ft.
.WED...S winds around 5 kt. Waves 1 ft.
.WED NIGHT...S winds around 5 kt. Waves 1 ft.
.THU...S winds around 5 kt. Waves 1 ft.
.THU NIGHT...S winds around 5 kt. Waves 1 ft.
.FRI...N winds around 5 kt. Waves 1 ft. A chance of showers through
the night.
.SAT...E winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.

$$

ANZ536-152000-
Tidal Potomac from Indian Head to Cobb Island-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...E winds 5 kt. Waves less than 1 ft.
.TONIGHT...S winds around 5 kt. Waves 1 ft.
.WED...S winds around 5 kt. Waves 1 ft.
.WED NIGHT...S winds 5 kt. Waves less than 1 ft.
.THU...S winds 5 kt. Waves less than 1 ft.
.THU NIGHT...S winds 5 kt. Waves less than 1 ft.
.FRI...N winds 5 kt...becoming NE after midnight. Waves 1 ft. A
chance of showers through the night.
.SAT...E winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.

$$

ANZ537-152000-
Tidal Potomac from Cobb Island to Smith Point-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...E winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.WED...SE winds around 5 kt. Waves 1 ft or less.
.WED NIGHT...S winds 5 kt. Waves less than 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt...becoming NE. Waves 1 to 2 ft. A chance
of showers in the afternoon.
.SAT...E winds 10 to 15 kt...becoming SE. Waves 2 ft.

$$

ANZ530-152000-
Chesapeake Bay north of Pooles Island-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...SE winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.WED...S winds around 5 kt. Waves 1 ft.
.WED NIGHT...S winds around 5 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft.
.SAT...E winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.

$$

ANZ531-152000-
Chesapeake Bay from Pooles Island to Sandy Point-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...SE winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 10 to 15 kt. Waves 1 to 2 ft.
.SAT...NE winds 10 to 15 kt...becoming S after midnight. Waves 1 to
2 ft.

$$

ANZ538-152000-
Patapsco River including Baltimore Harbor-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...SE winds 5 kt. Waves less than 1 ft.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft or less.
.WED NIGHT...S winds around 5 kt. Waves 1 ft or less.
.THU...S winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt. Waves 1 ft or less.
.SAT...E winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.

$$

ANZ539-152000-
Chester River to Queenstown MD-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...E winds around 5 kt. Waves 1 ft or less.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.WED...S winds 5 kt. Waves less than 1 ft.
.WED NIGHT...S winds 5 kt. Waves less than 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...N winds 5 to 10 kt...becoming NE after midnight. Waves 1 ft.
.SAT...E winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.

$$

ANZ532-152000-
Chesapeake Bay from Sandy Point to North Beach-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...SE winds 5 kt. Waves less than 1 ft.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 10 to 15 kt. Waves 1 to 2 ft.
.THU NIGHT...S winds 10 to 15 kt. Waves 2 ft.
.FRI...NW winds 5 to 10 kt...becoming NE 10 to 15 kt. Waves 1 to
2 ft. A chance of showers through the night.
.SAT...E winds 10 to 15 kt...becoming SE. Waves 1 to 2 ft.

$$

ANZ540-152000-
Eastern Bay-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...E winds around 5 kt. Waves flat.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.WED...S winds 5 kt. Waves less than 1 ft.
.WED NIGHT...S winds 5 kt. Waves less than 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt...becoming NE. Waves 1 ft.
.SAT...E winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.

$$

ANZ533-152000-
Chesapeake Bay from North Beach to Drum Point-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...E winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.WED...S winds 5 to 10 kt. Waves 1 ft or less.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 5 kt...increasing to 10 to 15 kt in the afternoon.
Waves 1 to 2 ft.
.THU NIGHT...S winds 10 to 15 kt. Waves 1 to 2 ft.
.FRI...NW winds 5 to 10 kt...becoming NE 10 to 15 kt. Waves 1 to
2 ft. A chance of showers through the night.
.SAT...E winds 10 to 15 kt...becoming SE. Waves 1 to 2 ft.

$$

ANZ541-152000-
Choptank River to Cambridge MD and the Little Choptank River-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...SE winds around 5 kt. Waves 1 ft or less.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.WED...S winds around 5 kt. Waves 1 ft or less.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt...becoming NE 10 to 15 kt. Waves 1 ft.
.SAT...E winds 10 to 15 kt...becoming SE. Waves 1 ft.

$$

ANZ542-152000-
Patuxent River to Broomes Island MD-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...E winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds around 5 kt. Waves 1 ft.
.WED...S winds around 5 kt. Waves 1 ft.
.WED NIGHT...S winds around 5 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...W winds 5 kt...becoming NE. Waves 1 ft.
.SAT...E winds 5 to 10 kt...becoming S after midnight. Waves 1 ft.

$$

ANZ534-152000-
Chesapeake Bay from Drum Point to Smith Point-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...E winds 5 to 10 kt. Waves 1 ft or less.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.WED...SE winds around 5 kt. Waves 1 ft or less.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 to 2 ft.
.THU NIGHT...S winds 10 to 15 kt. Waves 2 ft.
.FRI...NW winds 5 to 10 kt...becoming NE 10 to 15 kt. Waves 1 to
2 ft.
.SAT...E winds 10 to 15 kt...becoming SE. Waves 2 ft.

$$

ANZ543-152000-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
1057 AM EDT Tue Sep 15 2026

.REST OF TODAY...E winds 5 kt. Waves less than 1 ft.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft.
.WED...SE winds around 5 kt. Waves flat.
.WED NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.THU...S winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...S winds 10 to 15 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt...becoming NE. Waves 1 ft.
.SAT...E winds 10 to 15 kt...becoming SE. Waves 1 ft.

$$