National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 122249
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
549 PM EST Mon Jan 12 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.

ANZ500-131000
549 PM EST Mon Jan 12 2026

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

High pressure will build south of the area into Tuesday. A coastal low may develop Wednesday night into Thursday, before tracking out to sea by the end of the week. Small Craft Advisories are possible Tuesday afternoon into Wednesday, as well as Thursday into Friday. Gale gusts can't be ruled out Thursday into Thursday night.

ANZ535-131000
Tidal Potomac from Key Bridge to Indian Head
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds around 5 kt. Waves 1 ft or less.

TUE
S winds 5 to 10 kt. Waves 1 ft.

TUE NIGHT
SW winds 5 to 10 kt. Waves 1 ft.

WED
SW winds 5 kt. Waves less than 1 ft. A chance of rain.

WED NIGHT
SW winds around 5 kt...becoming NW 10 to 15 kt with gusts to 20 kt after midnight. Waves 1 ft. Rain likely.

THU
NW winds 10 to 15 kt with gusts to 30 kt. Waves 1 ft. A chance of rain and snow.

THU NIGHT
NW winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 1 ft.

FRI
SW winds 5 to 10 kt. Waves 1 ft.

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

ANZ536-131000
Tidal Potomac from Indian Head to Cobb Island
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 5 to 10 kt. Waves 1 ft.

TUE
S winds 5 to 10 kt. Waves 1 ft.

TUE NIGHT
SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

WED
SW winds 5 to 10 kt. Waves 1 ft.

WED NIGHT
W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Rain likely.

THU
NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A chance of rain and snow.

THU NIGHT
NW winds 15 to 20 kt. Waves 1 to 2 ft.

FRI
SW winds 5 to 10 kt. Waves 1 ft.

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

ANZ537-131000
Tidal Potomac from Cobb Island to Smith Point
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 5 to 10 kt. Waves 1 ft.

TUE
S winds 5 to 10 kt. Waves 1 ft.

TUE NIGHT
SW winds 15 to 20 kt. Waves 2 ft.

WED
SW winds 10 to 15 kt. Waves 1 to 2 ft.

WED NIGHT
SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Rain likely.

THU
NW winds 15 to 20 kt. Waves 2 ft. A chance of snow and rain.

THU NIGHT
NW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.

FRI
W winds 10 to 15 kt...becoming SW. Waves 1 to 2 ft.

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

ANZ530-131000
Chesapeake Bay north of Pooles Island
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 5 kt. Waves less than 1 ft.

TUE
SW winds 5 to 10 kt. Waves 1 ft or less.

TUE NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

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

WED NIGHT
SW winds around 5 kt...becoming W 10 to 15 kt after midnight. Waves 1 ft or less. Rain likely.

THU
W winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A chance of rain and snow.

THU NIGHT
W winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.

FRI
W winds 10 to 15 kt...becoming SW 5 to 10 kt. Waves 1 ft.

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

ANZ531-131000
Chesapeake Bay from Pooles Island to Sandy Point
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 5 to 10 kt. Waves 1 ft or less.

TUE
S winds 5 to 10 kt. Waves 1 ft.

TUE NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

WED
S winds 5 to 10 kt. Waves 1 ft. A chance of rain.

WED NIGHT
SW winds around 5 kt...becoming W 10 to 15 kt after midnight. Waves flat...building to 2 ft after midnight. Rain likely.

THU
NW winds 20 to 25 kt. Waves 2 to 3 ft. A chance of rain and snow.

THU NIGHT
W winds 20 to 25 kt. Waves 3 ft.

FRI
W winds 15 to 20 kt...becoming SW 10 to 15 kt. Waves 1 to 2 ft.

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

ANZ538-131000
Patapsco River including Baltimore Harbor
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds around 5 kt. Waves 1 ft or less.

TUE
S winds 5 to 10 kt. Waves 1 ft or less.

TUE NIGHT
SW winds 5 to 10 kt. Waves 1 ft.

WED
S winds 5 kt. Waves less than 1 ft. A chance of rain.

WED NIGHT
W winds 5 to 10 kt. Waves 1 ft or less. Rain likely.

THU
NW winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. A chance of rain and snow.

THU NIGHT
W winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.

FRI
SW winds 5 to 10 kt. Waves 1 ft.

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

ANZ539-131000
Chester River to Queenstown MD
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 5 to 10 kt. Waves 1 ft or less.

TUE
S winds 5 to 10 kt. Waves 1 ft or less.

TUE NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

WED
S winds 5 to 10 kt. Waves 1 ft.

WED NIGHT
SW winds 5 kt...becoming W 10 to 15 kt after midnight. Waves flat...building to 2 ft after midnight. Rain likely.

THU
NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. A chance of rain and snow.

THU NIGHT
NW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.

FRI
W winds 10 to 15 kt...becoming SW. Waves 1 to 2 ft.

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

ANZ532-131000
Chesapeake Bay from Sandy Point to North Beach
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 5 to 10 kt. Waves 1 ft.

TUE
S winds 10 to 15 kt. Waves 1 to 2 ft.

TUE NIGHT
SW winds 15 to 20 kt. Waves 3 ft.

WED
S winds 5 to 10 kt. Waves 1 to 2 ft.

WED NIGHT
SW winds 5 kt...becoming W 10 to 15 kt with gusts to 20 kt after midnight. Waves 1 to 2 ft. Rain likely.

THU
NW winds 20 to 25 kt. Waves 2 to 3 ft. A chance of rain and snow.

THU NIGHT
NW winds 20 to 25 kt. Waves 3 ft.

FRI
W winds 15 to 20 kt...becoming SW 10 to 15 kt. Waves 2 ft.

SAT
SW winds 10 kt. Waves 1 to 2 ft.

ANZ540-131000
Eastern Bay
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 5 to 10 kt. Waves 1 ft.

TUE
S winds 5 to 10 kt. Waves 1 ft or less.

TUE NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

WED
S winds 5 to 10 kt. Waves 1 ft.

WED NIGHT
SW winds 5 kt...becoming W 10 to 15 kt after midnight. Waves 1 ft. Rain likely.

THU
NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A chance of rain and snow.

THU NIGHT
NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.

FRI
W winds 10 to 15 kt...becoming SW. Waves 1 to 2 ft.

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

ANZ533-131000
Chesapeake Bay from North Beach to Drum Point
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 5 to 10 kt. Waves 1 ft.

TUE
S winds 10 to 15 kt. Waves 1 to 2 ft.

TUE NIGHT
SW winds 15 to 20 kt. Waves 3 ft.

WED
SW winds 10 to 15 kt. Waves 1 to 2 ft.

WED NIGHT
W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Rain likely.

THU
NW winds 20 to 25 kt. Waves 3 ft. A chance of rain and snow.

THU NIGHT
NW winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

FRI
W winds 15 to 20 kt...becoming SW 10 to 15 kt. Waves 2 ft.

SAT
S winds 10 to 15 kt...becoming W after midnight. Waves 1 to 2 ft.

ANZ541-131000
Choptank River to Cambridge MD and the Little Choptank River
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 5 to 10 kt. Waves 1 ft.

TUE
S winds 10 to 15 kt. Waves 1 ft.

TUE NIGHT
S winds 15 to 20 kt. Waves 2 ft.

WED
SW winds 10 to 15 kt. Waves 1 ft.

WED NIGHT
SW winds 5 to 10 kt...becoming W 15 to 20 kt after midnight. Waves 1 to 2 ft. Rain likely.

THU
NW winds 20 to 25 kt. Waves 2 to 3 ft. A chance of rain and snow.

THU NIGHT
NW winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

FRI
W winds 15 to 20 kt...becoming SW 10 to 15 kt. Waves 1 to 2 ft.

SAT
S winds 10 to 15 kt...becoming W 5 to 10 kt after midnight. Waves 1 ft.

ANZ542-131000
Patuxent River to Broomes Island MD
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 5 to 10 kt. Waves 1 ft.

TUE
S winds 5 to 10 kt. Waves 1 ft.

TUE NIGHT
SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

WED
SW winds 5 to 10 kt. Waves 1 ft.

WED NIGHT
W winds 5 to 10 kt. Waves 1 ft. Rain likely.

THU
NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance of rain and snow.

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

FRI
SW winds 5 to 10 kt. Waves 1 ft.

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

ANZ534-131000
Chesapeake Bay from Drum Point to Smith Point
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 10 to 15 kt. Gusts up to 20 kt until early morning. Waves 1 to 2 ft.

TUE
S winds 10 to 15 kt. Waves 1 to 2 ft.

TUE NIGHT
SW winds 15 to 20 kt. Waves 3 ft.

WED
SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft.

WED NIGHT
SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Rain likely.

THU
NW winds 20 to 25 kt. Waves 3 ft. A chance of snow and rain.

THU NIGHT
NW winds 20 to 25 kt. Waves 4 ft.

FRI
W winds 15 to 20 kt...becoming SW 10 to 15 kt. Waves 2 to 3 ft.

SAT
SW winds 10 to 15 kt...becoming W after midnight. Waves 2 ft.

ANZ543-131000
Tangier Sound and the inland waters surrounding Bloodsworth Island
549 PM EST Mon Jan 12 2026

TONIGHT
SW winds 10 to 15 kt. Waves 1 ft.

TUE
S winds 10 to 15 kt. Waves 1 ft.

TUE NIGHT
SW winds 15 to 20 kt. Waves 2 ft.

WED
SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.

WED NIGHT
SW winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 ft.

THU
NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A chance of rain and snow.

THU NIGHT
NW winds 20 to 25 kt with gusts to 30 kt. Waves 2 ft.

FRI
W winds 15 to 20 kt...becoming SW 10 to 15 kt. Waves 1 to 2 ft.

SAT
SW winds 10 to 15 kt. Waves 1 to 2 ft.

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