National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 240627
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
227 AM EDT Thu Sep 24 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.

ANZ500-242000
227 AM EDT Thu Sep 24 2026

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

A strong coastal low will then develop offshore and intensify as it lifts northward into this weekend. Small Craft Advisories will likely be needed for much of the Friday through Saturday time period, and a few low-end gale gusts can't be ruled out.

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ANZ535-242000
Tidal Potomac from Key Bridge to Indian Head
227 AM EDT Thu Sep 24 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

OVERNIGHT
NE winds 10 kt with gusts to 20 kt. Waves 1 ft.

THU
NE winds 10 kt with gusts to 20 kt. Waves 1 ft.

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

FRI
N winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.

FRI NIGHT
N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

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

SAT NIGHT
NW winds 5 to 10 kt. Gusts up to 25 kt in the evening. Waves 1 ft.

SUN
NW winds 10 to 15 kt...diminishing to 5 kt after midnight. Waves 1 ft.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

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ANZ536-242000
Tidal Potomac from Indian Head to Cobb Island
227 AM EDT Thu Sep 24 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

OVERNIGHT
NE winds 15 kt with gusts to 25 kt. Waves 2 ft.

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

THU NIGHT
N winds 10 to 15 kt. Gusts up to 25 kt... diminishing to 20 kt after midnight. Waves 1 ft.

FRI
N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

FRI NIGHT
N winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.

SAT
NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.

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

SUN
NW winds 10 to 15 kt...diminishing to 5 kt after midnight. Waves 1 ft.

MON
NW winds 5 to 10 kt. Waves 1 ft.

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ANZ537-242000
Tidal Potomac from Cobb Island to Smith Point
227 AM EDT Thu Sep 24 2026

GALE WARNING IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING

SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH LATE TONIGHT

OVERNIGHT
NE winds 25 kt with gusts to 30 kt. Waves 4 ft.

THU
NE winds 15 to 20 kt with gusts to 30 kt. Waves 4 ft.

THU NIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

FRI
N winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.

FRI NIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

SAT
NW winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.

SAT NIGHT
NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.

SUN
NW winds 15 to 20 kt...diminishing to 5 to 10 kt after midnight. Waves 1 to 2 ft.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

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ANZ530-242000
Chesapeake Bay north of Pooles Island
227 AM EDT Thu Sep 24 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

OVERNIGHT
NE winds 20 kt with gusts to 25 kt. Waves 2 ft.

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

THU NIGHT
N winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.

FRI
N winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.

FRI NIGHT
N winds 20 to 25 kt. Waves 2 ft.

SAT
N winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.

SAT NIGHT
NW winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A chance of showers.

SUN
NW winds 15 to 20 kt...diminishing to 5 to 10 kt after midnight. Waves 1 to 2 ft. A chance of showers through the day.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

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ANZ531-242000
Chesapeake Bay from Pooles Island to Sandy Point
227 AM EDT Thu Sep 24 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

OVERNIGHT
NE winds 20 kt with gusts to 30 kt. Waves 3 ft.

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

THU NIGHT
N winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.

FRI
N winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.

FRI NIGHT
N winds 20 to 25 kt. Waves 3 ft.

SAT
N winds 20 to 25 kt. Waves 3 ft.

SAT NIGHT
N winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.

SUN
NW winds 15 to 20 kt. Waves 2 to 3 ft.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

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ANZ538-242000
Patapsco River including Baltimore Harbor
227 AM EDT Thu Sep 24 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

OVERNIGHT
NE winds 15 kt with gusts to 25 kt. Waves 2 ft.

THU
NE winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft.

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

FRI
N winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.

FRI NIGHT
N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

SAT
N winds 15 kt with gusts to 25 kt. Waves 1 to 2 ft.

SAT NIGHT
NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. A chance of showers.

SUN
NW winds 10 to 15 kt. Waves 1 ft.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

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ANZ539-242000
Chester River to Queenstown MD
227 AM EDT Thu Sep 24 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

OVERNIGHT
NE winds 20 kt with gusts to 25 kt. Waves 2 ft.

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

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

FRI
N winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.

FRI NIGHT
N winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.

SAT
N winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.

SAT NIGHT
N winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A chance of showers.

SUN
NW winds 15 to 20 kt...diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

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ANZ532-242000
Chesapeake Bay from Sandy Point to North Beach
227 AM EDT Thu Sep 24 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

OVERNIGHT
NE winds 25 kt with gusts to 30 kt. Waves 4 ft.

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

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

FRI
N winds 20 to 25 kt. Waves 3 ft.

FRI NIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

SAT
N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

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

SUN
NW winds 15 to 20 kt...diminishing to 10 kt after midnight. Waves 2 to 3 ft.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

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ANZ540-242000
Eastern Bay
227 AM EDT Thu Sep 24 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

OVERNIGHT
NE winds 20 kt with gusts to 25 kt. Waves 2 ft.

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

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

FRI
N winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.

FRI NIGHT
N winds 20 to 25 kt. Waves 2 ft.

SAT
N winds 20 to 25 kt. Waves 2 ft.

SAT NIGHT
N winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. A chance of showers.

SUN
NW winds 15 to 20 kt...diminishing to 10 kt after midnight. Waves 1 to 2 ft.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

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ANZ533-242000
Chesapeake Bay from North Beach to Drum Point
227 AM EDT Thu Sep 24 2026

GALE WARNING IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING

SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH LATE TONIGHT

OVERNIGHT
NE winds 25 kt with gusts to 30 kt. Waves 5 ft...except around 3 ft near the mouth of the Choptank.

THU
NE winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

THU NIGHT
NE winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

FRI
N winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

FRI NIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

SAT
N winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

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

SUN
NW winds 15 to 20 kt. Waves 2 to 3 ft.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

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ANZ541-242000
Choptank River to Cambridge MD and the Little Choptank River
227 AM EDT Thu Sep 24 2026

GALE WARNING IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING

SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH LATE TONIGHT

OVERNIGHT
NE winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

THU
NE winds 20 to 25 kt with gusts to 30 kt. Waves 2 to 3 ft.

THU NIGHT
NE winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.

FRI
N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

FRI NIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

SAT
N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

SAT NIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

SUN
NW winds 15 to 20 kt. Waves 2 to 3 ft.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

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ANZ542-242000
Patuxent River to Broomes Island MD
227 AM EDT Thu Sep 24 2026

GALE WARNING IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING

SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH LATE TONIGHT

OVERNIGHT
NE winds 15 kt with gusts to 30 kt. Waves 1 ft.

THU
NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 ft.

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

FRI
N winds 15 to 20 kt with gusts to 25 kt. Waves 1 ft.

FRI NIGHT
N winds 15 to 20 kt with gusts to 30 kt. Waves 1 ft.

SAT
N winds 15 to 20 kt with gusts to 25 kt. Waves 1 ft.

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

SUN
NW winds 10 to 15 kt...diminishing to 5 kt after midnight. Waves 1 ft.

MON
NW winds 5 to 10 kt. Waves 1 ft.

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ANZ534-242000
Chesapeake Bay from Drum Point to Smith Point
227 AM EDT Thu Sep 24 2026

GALE WARNING IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING

SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH LATE TONIGHT

OVERNIGHT
NE winds 25 kt with gusts to 30 kt. Waves 5 ft.

THU
NE winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

THU NIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

FRI
N winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

FRI NIGHT
N winds 25 to 30 kt. Waves 5 ft.

SAT
N winds 25 to 30 kt. Waves 5 ft.

SAT NIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft.

SUN
NW winds 15 to 20 kt. Waves 3 ft...subsiding to 2 ft after midnight.

MON
NW winds 5 to 10 kt. Waves 1 to 2 ft.

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ANZ543-242000
Tangier Sound and the inland waters surrounding Bloodsworth Island
227 AM EDT Thu Sep 24 2026

GALE WARNING IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING

SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH LATE TONIGHT

OVERNIGHT
NE winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

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

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

FRI
N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

FRI NIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

SAT
N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

SAT NIGHT
N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.

SUN
NW winds 15 to 20 kt. Waves 2 to 3 ft... subsiding to 1 ft after midnight.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.