National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 020303
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1102 PM EDT Fri May 1 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.

ANZ500-020800
1102 PM EDT Fri May 1 2026

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

A trough of low pressure lingers this afternoon. A coastal low tracks off the Carolinas on Saturday before high pressure builds to the southwest to finish the weekend. Another frontal system approaches from the west by early next week. Small Craft Advisories may be needed tonight, Saturday night into Sunday, and Monday through Tuesday.

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ANZ535-020800
Tidal Potomac from Key Bridge to Indian Head
1102 PM EDT Fri May 1 2026

REST OF TONIGHT
SW winds 5 kt...becoming NW late. Waves 1 ft. Scattered showers.

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

SAT NIGHT
NW winds 5 to 10 kt. Waves 1 ft.

SUN
NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.

SUN NIGHT
SW winds around 5 kt. Waves 1 ft.

MON
SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.

MON NIGHT
S winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.

TUE
S winds 10 to 15 kt. Waves 1 ft. A chance of showers after midnight.

WED
S winds 10 to 15 kt. Waves 1 ft. A chance of showers in the morning, then showers likely.

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ANZ536-020800
Tidal Potomac from Indian Head to Cobb Island
1102 PM EDT Fri May 1 2026

REST OF TONIGHT
S winds 10 kt...becoming NW. Gusts up to 20 kt. Waves 1 ft. Scattered showers.

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

SAT NIGHT
NW winds 5 to 10 kt. Waves 1 ft.

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

SUN NIGHT
SW winds around 5 kt. Waves 1 ft.

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

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

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

WED
S winds 10 to 15 kt. Waves 1 ft. A chance of showers through the day. Showers likely through the night.

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ANZ537-020800
Tidal Potomac from Cobb Island to Smith Point
1102 PM EDT Fri May 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EDT SATURDAY

REST OF TONIGHT
S winds 15 kt with gusts to 25 kt... becoming NW late. Waves 1 to 2 ft. Scattered showers.

SAT
N winds 5 to 10 kt. Waves 1 to 2 ft. A chance of rain.

SAT NIGHT
NW winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to 2 ft. A chance of rain.

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

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

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

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

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

WED
S winds 15 to 20 kt. Waves 2 ft. A chance of showers through the day. Showers likely through the night.

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ANZ530-020800
Chesapeake Bay north of Pooles Island
1102 PM EDT Fri May 1 2026

REST OF TONIGHT
SW winds 10 to 15 kt...becoming W late. Waves 1 ft. Isolated showers late this evening, then scattered showers.

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

SAT NIGHT
NW winds 5 to 10 kt. Waves 1 ft.

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

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

MON
SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft.

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

TUE
S winds 15 to 20 kt. Waves 1 to 2 ft. A chance of showers after midnight.

WED
S winds 15 to 20 kt...becoming SW 10 to 15 kt. Waves 1 to 2 ft. Showers likely.

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ANZ531-020800
Chesapeake Bay from Pooles Island to Sandy Point
1102 PM EDT Fri May 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EDT SATURDAY

REST OF TONIGHT
SW winds 15 kt...becoming NW late. Gusts up to 20 kt. Waves 1 to 2 ft. Isolated showers late this evening, then scattered showers.

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

SAT NIGHT
NW winds 10 to 15 kt. Waves 1 to 2 ft.

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

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

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

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

TUE
S winds 15 to 20 kt. Waves 2 to 3 ft. A chance of showers after midnight.

WED
S winds 15 to 20 kt. Waves 2 to 3 ft. A chance of showers in the morning, then showers likely.

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ANZ538-020800
Patapsco River including Baltimore Harbor
1102 PM EDT Fri May 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EDT SATURDAY

REST OF TONIGHT
SW winds 5 kt...becoming NW late. Waves 1 ft. Scattered showers.

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

SAT NIGHT
NW winds 5 to 10 kt. Waves 1 ft.

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

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

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

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

TUE
S winds 10 to 15 kt. Waves 1 ft. A chance of showers after midnight.

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

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ANZ539-020800
Chester River to Queenstown MD
1102 PM EDT Fri May 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EDT SATURDAY

REST OF TONIGHT
S winds 10 kt...becoming NW late. Gusts up to 20 kt. Waves 1 ft. Isolated showers late this evening, then scattered showers.

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

SAT NIGHT
NW winds 5 to 10 kt. Waves 1 to 2 ft.

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

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

MON
SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft.

MON NIGHT
S winds 10 to 15 kt. Waves 1 ft.

TUE
S winds 15 to 20 kt. Waves 2 ft. A chance of showers after midnight.

WED
S winds 15 to 20 kt...diminishing to 10 to 15 kt. Waves 2 ft. A chance of showers in the morning, then showers likely.

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ANZ532-020800
Chesapeake Bay from Sandy Point to North Beach
1102 PM EDT Fri May 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EDT SATURDAY

REST OF TONIGHT
S winds 15 kt...becoming NW late. Gusts up to 20 kt. Waves 1 to 2 ft. Isolated showers late this evening, then scattered showers.

SAT
NW winds 10 to 15 kt...becoming N 5 to 10 kt in the afternoon. Waves 1 to 2 ft.

SAT NIGHT
NW winds 10 to 15 kt. Waves 1 to 2 ft.

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

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

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

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

TUE
S winds 15 to 20 kt. Waves 2 to 3 ft.

WED
S winds 15 to 20 kt. Waves 2 to 3 ft. A chance of showers through the day. Showers likely through the night.

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ANZ540-020800
Eastern Bay
1102 PM EDT Fri May 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EDT SATURDAY

REST OF TONIGHT
S winds 10 kt...becoming NW late. Gusts up to 20 kt. Waves 1 ft. Scattered showers.

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

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

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

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

MON
S winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.

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

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

WED
S winds 15 to 20 kt. Waves 2 ft. A chance of showers through the day. Showers likely through the night.

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ANZ533-020800
Chesapeake Bay from North Beach to Drum Point
1102 PM EDT Fri May 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EDT SATURDAY

REST OF TONIGHT
S winds 15 kt with gusts to 25 kt... becoming NW late. Waves 1 to 2 ft. Scattered showers.

SAT
N winds 10 to 15 kt...diminishing to 5 to 10 kt late. Waves 2 ft.

SAT NIGHT
N winds 10 to 15 kt...becoming NW with gusts to 20 kt late. Waves 1 to 2 ft. A chance of rain.

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

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

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

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

TUE
S winds 15 to 20 kt. Waves 2 to 3 ft.

WED
S winds 15 to 20 kt. Waves 2 to 3 ft. A chance of showers through the day. Showers likely through the night.

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ANZ541-020800
Choptank River to Cambridge MD and the Little Choptank River
1102 PM EDT Fri May 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EDT SATURDAY

REST OF TONIGHT
S winds 10 to 15 kt...becoming NW late. Gusts up to 20 kt. Waves 1 to 2 ft. Scattered showers.

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

SAT NIGHT
NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A chance of rain.

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

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

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

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

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

WED
S winds 15 to 20 kt. Waves 2 ft. A chance of showers through the day, then showers likely through the night.

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ANZ542-020800
Patuxent River to Broomes Island MD
1102 PM EDT Fri May 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EDT SATURDAY

REST OF TONIGHT
S winds 10 kt...becoming W. Gusts up to 20 kt. Waves 1 ft. Scattered showers.

SAT
N winds 5 to 10 kt. Waves 1 ft. A chance of rain.

SAT NIGHT
NW winds 5 to 10 kt. Waves 1 ft. A chance of rain.

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

SUN NIGHT
SW winds around 5 kt. Waves 1 ft.

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

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

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

WED
S winds 10 to 15 kt. Waves 1 ft. A chance of showers through the day. Showers likely through the night.

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ANZ534-020800
Chesapeake Bay from Drum Point to Smith Point
1102 PM EDT Fri May 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EDT SATURDAY

REST OF TONIGHT
S winds 20 kt with gusts to 25 kt... becoming NW 10 kt late. Waves 2 to 3 ft. Scattered showers.

SAT
N winds 10 to 15 kt. Waves 2 ft. A chance of rain.

SAT NIGHT
NW winds 15 to 20 kt. Waves 2 to 3 ft. A chance of rain.

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

SUN NIGHT
SW winds 10 to 15 kt. Waves 1 to 2 ft.

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

MON NIGHT
S winds 15 to 20 kt. Waves 2 to 3 ft.

TUE
S winds 15 to 20 kt. Waves 3 ft.

WED
S winds 15 to 20 kt. Waves 3 ft. A chance of showers through the day, then showers likely through the night.

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ANZ543-020800
Tangier Sound and the inland waters surrounding Bloodsworth Island
1102 PM EDT Fri May 1 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EDT SATURDAY

REST OF TONIGHT
S winds 15 to 20 kt with gusts to 25 kt... becoming W 10 kt late. Waves 1 to 2 ft. Scattered showers.

SAT
N winds 10 to 15 kt. Waves 1 ft. A chance of rain.

SAT NIGHT
NW winds 15 to 20 kt. Waves 1 to 2 ft. A chance of rain.

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

SUN NIGHT
SW winds 10 to 15 kt. Waves 1 ft.

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

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

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

WED
S winds 15 to 20 kt. Waves 2 ft. A chance of showers through the day. Showers likely through the night.