403
FZUS51 KLWX 181459
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
959 AM EST Tue Nov 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.

ANZ500-182100-
959 AM EST Tue Nov 18 2025

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

A wave of low pressure approaching from the Ohio River Valley will
track along a stalled front over or just south of the Mid-Atlantic
through Wednesday. The front will remain stalled just to the south
through Thursday. Another area of low pressure may take a similar
path Friday into Saturday. Small Craft Advisories may be needed
Wednesday afternoon, and Friday night into Saturday.

$$

ANZ535-182100-
Tidal Potomac from Key Bridge to Indian Head-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...SW winds 5 kt. Waves less than 1 ft. A chance of
rain this afternoon.
.TONIGHT...SE winds around 5 kt. Waves 1 ft. Rain. Patchy fog. Vsby
1 to 3 NM.
.WED...N winds around 5 kt. Waves 1 ft.
.WED NIGHT...NE winds around 5 kt. Waves 1 ft.
.THU...SE winds around 5 kt. Waves 1 ft or less.
.THU NIGHT...SE winds around 5 kt. Waves 1 ft. A chance of rain.
.FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft.
A chance of rain in the morning. A chance of rain in the evening,
then rain likely after midnight.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.

$$

ANZ536-182100-
Tidal Potomac from Indian Head to Cobb Island-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...S winds 5 kt. Waves less than 1 ft. A chance of
rain this afternoon.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft. Rain. Vsby 1 to 3 NM.
.WED...N winds 5 kt. Waves less than 1 ft.
.WED NIGHT...NE winds around 5 kt. Waves 1 ft.
.THU...E winds around 5 kt. Waves flat.
.THU NIGHT...SE winds around 5 kt. Waves 1 ft.
.FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft.
A chance of rain in the morning. A chance of rain in the evening,
then rain likely after midnight.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.

$$

ANZ537-182100-
Tidal Potomac from Cobb Island to Smith Point-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...SW winds 5 kt. Waves less than 1 ft. A chance of
rain this afternoon.
.TONIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the late evening
and overnight. Waves 1 ft. Rain. Vsby 1 to 3 NM.
.WED...SW winds 5 to 10 kt...becoming N in the late morning and
afternoon. Waves 1 ft.
.WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.THU...E winds around 5 kt. Waves 1 ft.
.THU NIGHT...SE winds around 5 kt. Waves flat.
.FRI...SW winds 5 to 10 kt...becoming W after midnight. Waves 1 ft.
A chance of rain in the evening. Rain likely after midnight.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.

$$

ANZ530-182100-
Chesapeake Bay north of Pooles Island-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...W winds 5 kt. Waves less than 1 ft. A slight chance
of rain this afternoon.
.TONIGHT...S winds 5 kt. Waves less than 1 ft. Rain. Patchy fog.
Vsby 1 to 3 NM.
.WED...NE winds 5 kt. Waves less than 1 ft. A chance of rain. Patchy
fog. Vsby 1 to 3 NM.
.WED NIGHT...N winds around 5 kt. Waves 1 ft.
.THU...E winds around 5 kt. Waves 1 ft.
.THU NIGHT...SE winds around 5 kt. Waves 1 ft or less. A chance of
rain.
.FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft.
A chance of rain in the morning. Rain likely in the evening, then a
chance of rain after midnight.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain in the
morning. A chance of rain in the evening.

$$

ANZ531-182100-
Chesapeake Bay from Pooles Island to Sandy Point-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...W winds 5 to 10 kt. Waves 1 ft. A slight chance of
rain this afternoon.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Rain. Patchy fog. Vsby
1 to 3 NM.
.WED...NE winds 5 to 10 kt. Waves 1 ft. A chance of rain. Vsby 1 to
3 NM.
.WED NIGHT...NE winds 5 kt. Waves less than 1 ft.
.THU...E winds around 5 kt. Waves flat.
.THU NIGHT...SE winds around 5 kt. Waves flat. A chance of rain.
.FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft.
A chance of rain in the morning. A chance of rain in the evening,
then rain likely after midnight.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.

$$

ANZ538-182100-
Patapsco River including Baltimore Harbor-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...W winds 5 kt. Waves flat. A slight chance of rain
this afternoon.
.TONIGHT...S winds 5 kt. Waves less than 1 ft. Rain. Patchy fog.
Vsby 1 to 3 NM.
.WED...NE winds 5 kt. Waves less than 1 ft. A chance of rain. Vsby
1 to 3 NM.
.WED NIGHT...NE winds around 5 kt. Waves 1 ft or less.
.THU...E winds around 5 kt. Waves flat.
.THU NIGHT...SE winds around 5 kt. Waves flat. A chance of rain.
.FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft
or less. A chance of rain in the morning. A chance of rain in the
evening, then rain likely after midnight.
.SAT...N winds 5 to 10 kt. Waves 1 ft or less. A chance of rain.

$$

ANZ539-182100-
Chester River to Queenstown MD-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...W winds 5 kt. Waves less than 1 ft. A slight chance
of rain this afternoon.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Rain. Patchy fog. Vsby
1 to 3 NM.
.WED...NE winds 5 kt. Waves less than 1 ft. A chance of rain. Vsby
1 to 3 NM.
.WED NIGHT...NE winds 5 kt. Waves less than 1 ft.
.THU...E winds around 5 kt. Waves flat.
.THU NIGHT...SE winds around 5 kt. Waves flat.
.FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft.
A chance of rain in the morning. A chance of rain in the evening,
then rain likely after midnight.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.

$$

ANZ532-182100-
Chesapeake Bay from Sandy Point to North Beach-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...SW winds 5 kt. Waves less than 1 ft. A chance of
rain this afternoon.
.TONIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft. Rain. Patchy fog.
Vsby 1 to 3 NM.
.WED...SW winds 5 to 10 kt...becoming N in the late morning and
afternoon. Waves 1 ft. A chance of rain.
.WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.THU...E winds around 5 kt. Waves 1 ft or less.
.THU NIGHT...SE winds around 5 kt. Waves 1 ft or less.
.FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft.
A chance of rain in the morning. A chance of rain in the evening,
then rain likely after midnight.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.

$$

ANZ540-182100-
Eastern Bay-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...W winds 5 kt. Waves less than 1 ft. A chance of
rain this afternoon.
.TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Rain. Patchy fog. Vsby
1 to 3 NM.
.WED...NE winds 5 kt. Waves less than 1 ft. A chance of rain.
.WED NIGHT...NE winds 5 kt. Waves less than 1 ft.
.THU...E winds around 5 kt. Waves flat.
.THU NIGHT...SE winds around 5 kt. Waves flat.
.FRI...SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft.
A chance of rain in the morning. A chance of rain in the evening,
then rain likely after midnight.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.

$$

ANZ533-182100-
Chesapeake Bay from North Beach to Drum Point-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...SW winds 5 kt. Waves less than 1 ft. A chance of
rain this afternoon.
.TONIGHT...S winds 5 to 10 kt. Waves 1 to 2 ft. Rain. Vsby 1 to
3 NM.
.WED...SW winds 5 to 10 kt...becoming N in the late morning and
afternoon. Waves 1 to 2 ft.
.WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.THU...E winds around 5 kt. Waves 1 ft or less.
.THU NIGHT...SE winds 5 kt. Waves less than 1 ft.
.FRI...SW winds 5 to 10 kt...becoming NW 10 to 15 kt after midnight.
Waves 1 ft. A chance of rain in the morning. A chance of rain in the
evening, then rain likely after midnight.
.SAT...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain.

$$

ANZ541-182100-
Choptank River to Cambridge MD and the Little Choptank River-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...W winds 5 kt. Waves less than 1 ft. A chance of
rain this afternoon.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft. Rain. Vsby 1 to 3 NM.
.WED...S winds 5 to 10 kt...becoming N in the late morning and
afternoon. Waves 1 ft. A chance of rain.
.WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.THU...E winds around 5 kt. Waves 1 ft or less.
.THU NIGHT...SE winds around 5 kt. Waves 1 ft or less.
.FRI...SW winds 5 to 10 kt...becoming NW 10 to 15 kt after midnight.
Waves 1 ft. A chance of rain in the morning. A chance of rain in the
evening, then rain likely after midnight.
.SAT...N winds 10 to 15 kt. Waves 1 ft. A chance of rain.

$$

ANZ542-182100-
Patuxent River to Broomes Island MD-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...SW winds 5 kt. Waves less than 1 ft. A chance of
rain this afternoon.
.TONIGHT...SE winds 5 to 10 kt. Waves 1 ft. Rain. Vsby 1 to 3 NM.
.WED...W winds 5 kt...becoming N in the afternoon. Waves 1 ft.
.WED NIGHT...NE winds 5 kt. Waves less than 1 ft.
.THU...E winds around 5 kt. Waves 1 ft.
.THU NIGHT...SE winds around 5 kt. Waves 1 ft.
.FRI...SW winds 5 kt...becoming NW after midnight. Waves 1 ft. A
chance of rain in the morning. A chance of rain in the evening, then
rain likely after midnight.
.SAT...N winds 5 to 10 kt. Waves 1 ft. A chance of rain.

$$

ANZ534-182100-
Chesapeake Bay from Drum Point to Smith Point-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...NW winds 10 kt...becoming SW this afternoon. Waves
1 ft. A slight chance of rain this afternoon.
.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Rain. Vsby 1 to 3 NM.
.WED...SW winds 10 kt...becoming N in the late morning and
afternoon. Waves 2 ft. A chance of rain. Vsby 1 to 3 NM.
.WED NIGHT...NE winds 5 to 10 kt. Waves 1 to 2 ft.
.THU...NE winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...SE winds 5 kt. Waves less than 1 ft.
.FRI...SW winds 5 to 10 kt...becoming W 10 to 15 kt after midnight.
Waves 1 to 2 ft. A chance of rain in the evening. Rain likely after
midnight.
.SAT...N winds 10 to 15 kt. Waves 1 to 2 ft. A chance of rain.

$$

ANZ543-182100-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
959 AM EST Tue Nov 18 2025

.REST OF TODAY...W winds 5 kt. Waves less than 1 ft. A chance of
rain this afternoon.
.TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the late
evening and overnight. Waves 1 ft. Rain. Vsby 1 to 3 NM.
.WED...SW winds 5 to 10 kt...becoming N in the late morning and
afternoon. Waves 1 ft. A chance of rain. Vsby 1 to 3 NM.
.WED NIGHT...NE winds 5 to 10 kt. Waves 1 ft.
.THU...NE winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...SE winds around 5 kt. Waves flat.
.FRI...SW winds 10 to 15 kt. Waves 1 ft. A chance of rain in the
evening. Rain likely after midnight.
.SAT...N winds 10 to 15 kt. Waves 1 ft. A chance of rain.

$$