National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 111459
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1059 AM EDT Sat Apr 11 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.

ANZ500-112000
1059 AM EDT Sat Apr 11 2026

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

A cold front will cross the waters early today before settling over the southeastern U.S. later in the weekend. High pressure will build quickly north and east of the area Sunday before a warm front moves through later that evening. Next week, high pressure builds to the south while a frontal zone remains over the Great Lakes into New England. Small Craft Advisories may be needed Sunday night through Monday evening.

ANZ535-112000
Tidal Potomac from Key Bridge to Indian Head
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 10 kt with gusts to 20 kt. Waves 1 ft.

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

SUN
SE winds 5 to 10 kt. Waves 1 ft.

SUN NIGHT
S winds 5 to 10 kt. Waves 1 ft.

MON
SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.

MON NIGHT
SW winds 10 to 15 kt with gusts to 20 kt...diminishing to 5 kt after midnight. Waves 1 ft.

TUE
SW winds around 5 kt. Waves 1 ft.

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

ANZ536-112000
Tidal Potomac from Indian Head to Cobb Island
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 10 kt with gusts to 20 kt. Waves 1 ft.

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

SUN
SE winds 5 to 10 kt. Waves 1 ft.

SUN NIGHT
S winds 5 to 10 kt. Waves 1 ft.

MON
SW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.

MON NIGHT
SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 ft.

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

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

ANZ537-112000
Tidal Potomac from Cobb Island to Smith Point
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.

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

SUN
SE winds 5 to 10 kt. Waves 1 ft.

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

MON
SW winds 10 to 15 kt with gusts to 30 kt. Waves 2 to 3 ft.

MON NIGHT
SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft.

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

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

ANZ530-112000
Chesapeake Bay north of Pooles Island
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

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

SUN
E winds 5 to 10 kt...becoming S late. Waves 1 ft or less.

SUN NIGHT
S winds 5 to 10 kt. Waves 1 ft.

MON
SW winds 10 to 15 kt with gusts to 30 kt. Waves 2 ft.

MON NIGHT
SW winds 10 to 15 kt with gusts to 20 kt...diminishing to 5 kt after midnight. Waves 2 ft... subsiding to flat after midnight.

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

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

ANZ531-112000
Chesapeake Bay from Pooles Island to Sandy Point
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

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

SUN
SE winds 5 to 10 kt. Waves 1 ft.

SUN NIGHT
S winds 10 to 15 kt. Waves 2 ft.

MON
SW winds 10 to 15 kt with gusts to 25 kt. Waves 2 to 3 ft.

MON NIGHT
SW winds 10 to 15 kt with gusts to 20 kt...diminishing to 5 kt after midnight. Waves 1 to 2 ft.

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

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

ANZ538-112000
Patapsco River including Baltimore Harbor
1059 AM EDT Sat Apr 11 2026

REST OF TODAY
N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

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

SUN
SE winds 5 to 10 kt. Waves 1 ft.

SUN NIGHT
S winds 5 to 10 kt. Waves 1 ft.

MON
SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft.

MON NIGHT
SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft or less.

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

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

ANZ539-112000
Chester River to Queenstown MD
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.

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

SUN
SE winds 5 to 10 kt...becoming S late. Waves 1 ft.

SUN NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.

MON
S winds 15 to 20 kt with gusts to 30 kt. Waves 2 to 3 ft.

MON NIGHT
SW winds 10 to 15 kt with gusts to 20 kt...diminishing to 5 kt after midnight. Waves 1 to 2 ft.

TUE
S winds 5 kt. Waves less than 1 ft.

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

ANZ532-112000
Chesapeake Bay from Sandy Point to North Beach
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 10 to 15 kt. Gusts up to 25 kt late this morning and early afternoon. Waves 2 ft.

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

SUN
SE winds 10 to 15 kt. Waves 1 to 2 ft.

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

MON
SW winds 10 to 15 kt with gusts to 25 kt. Waves 3 ft.

MON NIGHT
SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 3 ft...subsiding to 1 ft after midnight.

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

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

ANZ540-112000
Eastern Bay
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft.

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

SUN
SE winds 5 to 10 kt. Waves 1 ft.

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

MON
SW winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.

MON NIGHT
SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft.

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

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

ANZ533-112000
Chesapeake Bay from North Beach to Drum Point
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 15 kt with gusts to 25 kt. Waves 2 to 3 ft.

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

SUN
SE winds 5 to 10 kt. Waves 1 to 2 ft.

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

MON
SW winds 10 to 15 kt with gusts to 30 kt. Waves 3 ft.

MON NIGHT
SW winds 10 to 15 kt with gusts to 20 kt. Waves 3 ft... subsiding to 1 ft after midnight.

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

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

ANZ541-112000
Choptank River to Cambridge MD and the Little Choptank River
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 15 kt with gusts to 25 kt. Waves 1 to 2 ft.

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

SUN
SE winds 5 to 10 kt. Waves 1 ft.

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

MON
SW winds 15 to 20 kt with gusts to 30 kt. Waves 2 to 3 ft.

MON NIGHT
SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft.

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

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

ANZ542-112000
Patuxent River to Broomes Island MD
1059 AM EDT Sat Apr 11 2026

REST OF TODAY
N winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.

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

SUN
SE winds 5 to 10 kt. Waves 1 ft.

SUN NIGHT
S winds 10 kt. Waves 1 ft.

MON
SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.

MON NIGHT
SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 ft.

TUE
S winds 5 kt. Waves less than 1 ft.

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

ANZ534-112000
Chesapeake Bay from Drum Point to Smith Point
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 15 kt with gusts to 25 kt. Waves 3 ft.

TONIGHT
NE winds 5 to 10 kt. Waves 1 to 2 ft.

SUN
SE winds 5 to 10 kt. Waves 1 to 2 ft.

SUN NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 3 ft.

MON
SW winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.

MON NIGHT
SW winds 10 to 15 kt with gusts to 25 kt. Waves 2 to 3 ft.

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

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

ANZ543-112000
Tangier Sound and the inland waters surrounding Bloodsworth Island
1059 AM EDT Sat Apr 11 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON

REST OF TODAY
N winds 15 kt with gusts to 25 kt. Waves 2 ft.

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

SUN
SE winds 5 to 10 kt. Waves 1 ft.

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

MON
S winds 15 to 20 kt with gusts to 30 kt. Waves 2 to 3 ft.

MON NIGHT
SW winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.

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

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

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