Station List

National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 240258
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
958 PM EST Tue Dec 23 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.

ANZ500-240900
958 PM EST Tue Dec 23 2025

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

Low pressure tracks over the Great Lakes today with the associated cold front pushing eastward by tonight and high pressure briefly building overhead Wednesday. A warm front will slowly approach from the southwest Thursday, bringing a few passing showers. An area of low pressure will traverse the boundary as it stalls nearby or just to the south Friday bringing the potential of a wintry mix. A stronger cold front arrives toward the end of the weekend.

ANZ535-240900
Tidal Potomac from Key Bridge to Indian Head
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 5 to 10 kt. Waves 1 ft.

WED
NW winds 10 to 15 kt...diminishing to 5 kt late. Gusts up to 25 kt until late afternoon. Waves 1 ft.

WED NIGHT
E winds around 5 kt. Waves 1 ft or less. A chance of rain. Vsby 1 to 3 NM.

THU
SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.

THU NIGHT
N winds 5 to 10 kt. Waves 1 ft.

FRI
E winds 5 kt. Waves less than 1 ft. Rain.

FRI NIGHT
SE winds around 5 kt. Waves 1 ft. Rain.

SAT
NE winds around 5 kt. Waves 1 ft. A chance of rain after midnight.

SUN
S winds 10 to 15 kt...becoming W 15 to 20 kt. Waves 1 ft. A chance of rain.

ANZ536-240900
Tidal Potomac from Indian Head to Cobb Island
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 5 to 10 kt. Waves 1 ft.

WED
NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

WED NIGHT
E winds around 5 kt...becoming S late. Waves 1 ft. A chance of rain. Vsby 1 to 3 NM.

THU
SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.

THU NIGHT
N winds 5 to 10 kt. Waves 1 ft.

FRI
E winds 5 to 10 kt. Waves 1 ft. Rain.

FRI NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Rain.

SAT
NE winds around 5 kt. Waves 1 ft.

SUN
S winds 10 to 15 kt...becoming W 20 to 25 kt. Waves 1 to 2 ft...building to 3 ft after midnight. A chance of rain.

ANZ537-240900
Tidal Potomac from Cobb Island to Smith Point
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 5 to 10 kt. Waves 1 ft.

WED
NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

WED NIGHT
NE winds around 5 kt...becoming SE late. Waves 1 ft.

THU
SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.

THU NIGHT
N winds 10 to 15 kt. Waves 1 to 2 ft.

FRI
E winds 5 to 10 kt. Waves 1 to 2 ft. Rain likely.

FRI NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Rain.

SAT
NE winds 5 to 10 kt. Waves 1 ft.

SUN
S winds 10 to 15 kt...becoming W 20 to 25 kt. Waves 1 to 2 ft...building to 3 ft after midnight. A chance of rain.

ANZ530-240900
Chesapeake Bay north of Pooles Island
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 5 to 10 kt...increasing to 15 kt with gusts to 20 kt late. Waves 1 ft.

WED
NW winds 15 to 20 kt with gusts to 25 kt... diminishing to 5 to 10 kt late. Waves 1 to 2 ft.

WED NIGHT
NE winds around 5 kt. Waves flat.

THU
S winds 5 to 10 kt...becoming W in the afternoon. Waves 1 ft. A chance of rain.

THU NIGHT
N winds 5 to 10 kt. Waves 1 ft.

FRI
E winds 5 to 10 kt. Waves 1 ft. Rain, snow, sleet and freezing rain likely.

FRI NIGHT
E winds 5 to 10 kt. Waves 1 ft. Rain and freezing rain.

SAT
NE winds 5 to 10 kt. Waves 1 ft or less. A chance of rain in the morning. A chance of rain after midnight.

SUN
S winds 10 to 15 kt...becoming W 15 to 20 kt in the evening, then increasing to 25 to 30 kt after midnight. Waves 1 to 2 ft. Rain likely through the day, then a chance of rain through the night.

ANZ531-240900
Chesapeake Bay from Pooles Island to Sandy Point
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 5 to 10 kt...increasing to 15 kt with gusts to 20 kt late. Waves 1 to 2 ft.

WED
NW winds 15 to 20 kt with gusts to 25 kt... diminishing to 5 to 10 kt late. Waves 2 ft.

WED NIGHT
NE winds around 5 kt...becoming SE late. Waves 1 ft.

THU
SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.

THU NIGHT
N winds 10 to 15 kt. Waves 1 ft.

FRI
E winds 5 to 10 kt. Waves 1 ft. Rain, snow and sleet.

FRI NIGHT
E winds 5 to 10 kt. Waves 1 ft. Rain and freezing rain.

SAT
NE winds 5 to 10 kt. Waves 1 ft or less. A chance of rain in the morning. A chance of rain after midnight.

SUN
S winds 10 to 15 kt...becoming W 25 to 30 kt. Waves 1 to 2 ft...building to 3 ft. Rain likely through the day, then a chance of rain through the night.

ANZ538-240900
Patapsco River including Baltimore Harbor
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 5 to 10 kt. Gusts up to 20 kt. Waves 1 ft or less.

WED
NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.

WED NIGHT
NE winds around 5 kt. Waves flat.

THU
S winds 5 to 10 kt...becoming W in the afternoon. Waves 1 ft. A chance of rain.

THU NIGHT
N winds 5 to 10 kt. Waves 1 ft.

FRI
E winds 5 to 10 kt. Waves 1 ft. Rain, snow and sleet.

FRI NIGHT
E winds 5 to 10 kt. Waves 1 ft. Rain.

SAT
NE winds around 5 kt. Waves 1 ft or less. A chance of rain in the morning. A chance of rain after midnight.

SUN
S winds 5 to 10 kt...becoming W 15 to 20 kt. Waves 1 to 2 ft. Rain likely through the day, then a chance of rain through the night.

ANZ539-240900
Chester River to Queenstown MD
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 5 to 10 kt...increasing to 15 kt with gusts to 20 kt late. Waves 1 to 2 ft.

WED
NW winds 10 to 15 kt. Gusts up to 25 kt until late afternoon. Waves 2 ft.

WED NIGHT
NE winds around 5 kt...becoming S late. Waves 1 ft or less.

THU
SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.

THU NIGHT
N winds 5 to 10 kt. Waves 1 ft.

FRI
E winds 5 to 10 kt. Waves 1 ft. Rain, snow and sleet.

FRI NIGHT
E winds 5 to 10 kt. Waves 1 ft. Rain.

SAT
NE winds 5 to 10 kt. Waves 1 ft or less. A chance of rain in the morning. A chance of rain after midnight.

SUN
S winds 5 to 10 kt...becoming W 20 to 25 kt. Waves 1 ft... building to 3 ft. Rain likely through the day, then a chance of rain through the night.

ANZ532-240900
Chesapeake Bay from Sandy Point to North Beach
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 ft.

WED
NW winds 10 to 15 kt. Gusts up to 20 kt. Waves 2 ft.

WED NIGHT
NE winds around 5 kt...becoming S late. Waves 1 ft.

THU
S winds 10 to 15 kt...becoming W 5 to 10 kt in the afternoon. Waves 1 to 2 ft. A chance of rain.

THU NIGHT
N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

FRI
NE winds 10 to 15 kt...becoming E 5 to 10 kt in the afternoon. Waves 1 to 2 ft. Rain and snow.

FRI NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Rain.

SAT
NE winds 5 to 10 kt. Waves 1 ft. A chance of rain in the morning. A chance of rain after midnight.

SUN
S winds 10 to 15 kt...becoming W 25 to 30 kt. Waves 1 to 2 ft...building to 3 ft. A chance of rain in the morning, then rain likely in the afternoon. A chance of rain through the night.

ANZ540-240900
Eastern Bay
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 5 to 10 kt. Waves 1 ft.

WED
NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

WED NIGHT
NE winds around 5 kt...becoming S late. Waves flat.

THU
SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.

THU NIGHT
N winds 10 to 15 kt. Waves 1 ft.

FRI
E winds 5 to 10 kt. Waves 1 ft. Rain and snow.

FRI NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Rain.

SAT
NE winds 5 to 10 kt. Waves 1 ft or less. A chance of rain in the morning. A chance of rain after midnight.

SUN
S winds 10 to 15 kt...becoming W 15 to 20 kt in the evening, then becoming NW 25 to 30 kt after midnight. Waves 1 to 2 ft... building to 3 ft after midnight. A chance of rain in the morning, then rain likely in the afternoon. A chance of rain through the night.

ANZ533-240900
Chesapeake Bay from North Beach to Drum Point
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to 2 ft.

WED
NW winds 15 to 20 kt...becoming N 5 to 10 kt late. Waves 2 ft.

WED NIGHT
NE winds 5 kt...becoming S late. Waves 1 ft.

THU
S winds 10 to 15 kt...becoming W 5 to 10 kt in the afternoon. Waves 2 ft. A chance of rain.

THU NIGHT
N winds 15 to 20 kt. Waves 2 ft.

FRI
NE winds 10 to 15 kt...becoming E 5 to 10 kt in the afternoon. Waves 1 to 2 ft. Rain with a chance of snow.

FRI NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Rain.

SAT
NE winds 5 to 10 kt. Waves 1 ft. A chance of rain after midnight.

SUN
S winds 5 to 10 kt...becoming SW 15 to 20 kt in the afternoon, then becoming W 25 to 30 kt. Waves 1 to 2 ft...building to 3 ft. A chance of rain.

ANZ541-240900
Choptank River to Cambridge MD and the Little Choptank River
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to 2 ft.

WED
NW winds 15 to 20 kt...becoming N 5 to 10 kt late. Waves 2 ft.

WED NIGHT
NE winds around 5 kt...becoming SE late. Waves 1 ft.

THU
S winds 10 to 15 kt...becoming W 5 to 10 kt in the afternoon. Waves 1 ft. A chance of rain.

THU NIGHT
N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

FRI
NE winds 10 to 15 kt...becoming E 5 to 10 kt in the afternoon. Waves 1 ft. A chance of rain and snow.

FRI NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Rain.

SAT
NE winds 5 to 10 kt. Waves 1 ft or less. A chance of rain after midnight.

SUN
S winds 10 to 15 kt...becoming W 25 to 30 kt. Waves 1 to 2 ft...building to 3 ft. A chance of rain.

ANZ542-240900
Patuxent River to Broomes Island MD
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 5 to 10 kt. Waves 1 ft.

WED
NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

WED NIGHT
E winds around 5 kt. Waves 1 ft.

THU
SW winds 5 to 10 kt. Waves 1 ft. A chance of rain.

THU NIGHT
N winds 5 to 10 kt. Waves 1 ft.

FRI
E winds 5 to 10 kt. Waves 1 ft. Rain likely.

FRI NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Rain.

SAT
NE winds 5 to 10 kt. Waves 1 ft.

SUN
SW winds 10 to 15 kt...becoming NW 15 to 20 kt after midnight. Waves 1 ft. A chance of rain.

ANZ534-240900
Chesapeake Bay from Drum Point to Smith Point
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 10 to 15 kt. Waves 1 to 2 ft.

WED
NW winds 15 to 20 kt...becoming N 5 to 10 kt late. Waves 3 ft.

WED NIGHT
NE winds 5 to 10 kt...becoming SE late. Waves 1 ft.

THU
S winds 10 to 15 kt...becoming W in the afternoon. Waves 2 ft. A chance of rain.

THU NIGHT
N winds 15 to 20 kt. Waves 2 ft.

FRI
NE winds 10 to 15 kt...becoming E 5 to 10 kt in the afternoon. Waves 1 to 2 ft. Rain likely.

FRI NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Rain.

SAT
NE winds 5 to 10 kt...becoming E after midnight. Waves 1 ft.

SUN
S winds 10 to 15 kt...becoming W 20 to 25 kt in the evening, then becoming NW 25 to 30 kt after midnight. Waves 1 to 2 ft... building to 5 ft. A chance of rain.

ANZ543-240900
Tangier Sound and the inland waters surrounding Bloodsworth Island
958 PM EST Tue Dec 23 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EST WEDNESDAY THROUGH WEDNESDAY AFTERNOON

REST OF TONIGHT
W winds 10 to 15 kt. Waves 1 ft.

WED
NW winds 10 to 15 kt. Gusts up to 25 kt until late afternoon. Waves 2 ft.

WED NIGHT
NE winds 5 to 10 kt...becoming SE late. Waves 1 ft.

THU
S winds 10 to 15 kt...becoming W in the afternoon. Gusts up to 20 kt. Waves 1 ft. A chance of rain.

THU NIGHT
N winds 10 to 15 kt. Waves 1 to 2 ft.

FRI
NE winds 10 to 15 kt...becoming E 5 to 10 kt in the afternoon. Waves 1 ft. Rain likely.

FRI NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Rain.

SAT
NE winds 5 to 10 kt. Waves 1 ft or less.

SUN
S winds 10 to 15 kt...becoming W 20 to 25 kt in the evening, then becoming NW 25 to 30 kt after midnight. Waves 1 to 2 ft... building to 3 ft after midnight. A chance of rain.