National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 101927
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
327 PM EDT Sat Oct 10 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.

ANZ500-110830
327 PM EDT Sat Oct 10 2026

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

The remnants of Isaias will move across the region late tonight through Monday morning. In the wake, high pressure builds to the south of the waters before a dry cold front pushes through by mid
week. Gale-force winds possible for several hours Sunday morning, mainly over southern portions of the Chesapeake Bay. Additional Small Craft Advisories are likely needed for Monday afternoon.

---

ANZ535-110830
Tidal Potomac from Key Bridge to Indian Head
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM EDT SUNDAY THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 10 kt. Waves 1 ft.

TONIGHT
E winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves 1 ft. Showers.

SUN
E winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. Showers with a chance of tstms.

SUN NIGHT
SE winds 5 to 10 kt...becoming W after midnight. Waves 1 ft. Showers with a chance of tstms.

MON
NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance of showers.

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

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

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

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ536-110830
Tidal Potomac from Indian Head to Cobb Island
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM EDT SUNDAY THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 10 kt. Waves 1 ft.

TONIGHT
E winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt late. Waves 1 to 2 ft. Showers.

SUN
E winds 10 to 15 kt. Gusts up to 30 kt... diminishing to 20 kt in the afternoon. Waves 2 ft. Showers with a chance of tstms.

SUN NIGHT
SE winds 5 to 10 kt...becoming W after midnight. Waves 1 ft. Showers with a chance of tstms.

MON
NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance of showers.

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

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

WED
NW winds 5 kt...becoming N after midnight. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ537-110830
Tidal Potomac from Cobb Island to Smith Point
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EDT THIS EVENING THROUGH LATE TONIGHT

GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY MORNING

SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 15 kt. Waves 2 ft.

TONIGHT
E winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. Showers.

SUN
SE winds 20 to 25 kt with gusts to 35 kt... diminishing to 10 to 15 kt with gusts to 20 kt late. Waves 4 ft. Showers with a chance of tstms.

SUN NIGHT
S winds 10 to 15 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

MON
NW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers likely.

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

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

WED
NW winds 5 to 10 kt...becoming N 10 to 15 kt after midnight. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ530-110830
Chesapeake Bay north of Pooles Island
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM EDT SUNDAY THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 10 kt. Waves 1 ft.

TONIGHT
E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance of showers.

SUN
E winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. Showers with a chance of tstms.

SUN NIGHT
E winds 15 to 20 kt with gusts to 25 kt... becoming NE 5 to 10 kt after midnight. Waves 1 to 2 ft. Showers with a chance of tstms.

MON
N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance of showers and tstms.

MON NIGHT
NW winds around 5 kt. Waves 1 ft.

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

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

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ531-110830
Chesapeake Bay from Pooles Island to Sandy Point
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EDT THIS EVENING THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 10 kt. Waves 1 ft.

TONIGHT
E winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft. Showers likely.

SUN
E winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. Showers with a chance of tstms.

SUN NIGHT
E winds 15 to 20 kt with gusts to 25 kt... becoming N 10 to 15 kt after midnight. Waves 1 to 2 ft. Showers with a chance of tstms.

MON
N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance of showers.

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

TUE
SW winds 5 to 10 kt. Waves 1 ft or less... building to 2 ft.

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

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ538-110830
Patapsco River including Baltimore Harbor
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM EDT SUNDAY THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 10 kt. Waves 1 ft.

TONIGHT
E winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely.

SUN
E winds 15 kt with gusts to 25 kt. Waves 2 ft. Showers with a chance of tstms.

SUN NIGHT
E winds 10 to 15 kt...becoming N 5 to 10 kt after midnight. Gusts up to 20 kt. Waves 1 to 2 ft. Showers with a chance of tstms.

MON
N winds 10 kt with gusts to 20 kt. Waves 1 ft. Showers likely.

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

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

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

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ539-110830
Chester River to Queenstown MD
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM EDT SUNDAY THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 10 kt. Waves 1 ft.

TONIGHT
E winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft. Showers likely.

SUN
E winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. Showers with a chance of tstms.

SUN NIGHT
SE winds 10 to 15 kt...becoming SW 5 to 10 kt after midnight. Gusts up to 20 kt. Waves 1 ft. Showers with a chance of tstms.

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

MON NIGHT
NW winds 5 kt. Waves less than 1 ft.

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

WED
W winds 5 to 10 kt...becoming N after midnight. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ532-110830
Chesapeake Bay from Sandy Point to North Beach
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EDT THIS EVENING THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 10 kt. Waves 1 ft.

TONIGHT
E winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. Showers.

SUN
E winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. Showers with a chance of tstms.

SUN NIGHT
SE winds 10 to 15 kt...becoming SW after midnight. Gusts up to 20 kt. Waves 3 ft...subsiding to 1 ft after midnight. Showers likely with a chance of tstms.

MON
NW winds 15 to 20 kt. Waves 2 ft. Showers.

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

TUE
SW winds 10 to 15 kt. Waves 1 ft or less... building to 2 ft.

WED
NW winds 5 to 10 kt...becoming N 10 to 15 kt after midnight. Waves 1 to 2 ft.

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ540-110830
Eastern Bay
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM EDT SUNDAY THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 10 kt. Waves 1 ft.

TONIGHT
E winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft. Showers likely.

SUN
E winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. Showers with a chance of tstms.

SUN NIGHT
SE winds 10 to 15 kt...becoming SW 5 to 10 kt after midnight. Gusts up to 20 kt. Waves 1 ft. Showers with a chance of tstms.

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

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

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

WED
W winds 5 to 10 kt...becoming N after midnight. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ533-110830
Chesapeake Bay from North Beach to Drum Point
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EDT THIS EVENING THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 10 kt. Waves 1 ft.

TONIGHT
E winds 15 to 20 kt. Gusts up to 25 kt... increasing to 30 kt late. Waves 2 to 3 ft. Showers.

SUN
SE winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft. Showers with a chance of tstms.

SUN NIGHT
S winds 10 to 15 kt...becoming SW after midnight. Gusts up to 20 kt. Waves 3 ft...subsiding to 1 ft after midnight. Showers likely with a chance of tstms.

MON
NW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A chance of showers.

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

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

WED
NW winds 5 to 10 kt...becoming N 10 to 15 kt after midnight. Waves 1 to 2 ft.

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ541-110830
Choptank River to Cambridge MD and the Little Choptank River
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM EDT SUNDAY THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 10 kt. Waves 1 ft.

TONIGHT
E winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. Showers likely.

SUN
E winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. Showers with a chance of tstms.

SUN NIGHT
S winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

MON
NW winds 15 to 20 kt. Waves 2 ft. Showers likely.

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

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

WED
NW winds 5 to 10 kt...becoming N 10 to 15 kt after midnight. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ542-110830
Patuxent River to Broomes Island MD
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM EDT SUNDAY THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 10 kt. Waves 1 ft.

TONIGHT
E winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. Showers.

SUN
SE winds 15 to 20 kt. Gusts up to 30 kt... diminishing to 20 kt late. Waves 1 ft. Showers with a chance of tstms.

SUN NIGHT
S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms.

MON
NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Showers likely.

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

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

WED
NW winds 5 to 10 kt...becoming N after midnight. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ534-110830
Chesapeake Bay from Drum Point to Smith Point
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EDT THIS EVENING THROUGH LATE TONIGHT

GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY MORNING

SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 15 kt with gusts to 20 kt. Waves 2 ft.

TONIGHT
E winds 20 to 25 kt. Gusts up to 30 kt. Waves 3 ft. Showers.

SUN
SE winds 20 to 25 kt. Gusts up to 35 kt... diminishing to 25 kt late. Waves 5 ft. Showers with a chance of tstms.

SUN NIGHT
S winds 10 to 15 kt...becoming SW after midnight. Gusts up to 20 kt. Waves 2 to 3 ft. Showers likely with a chance of tstms.

MON
NW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft. A chance of showers.

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

TUE
W winds 5 kt...becoming S 10 to 15 kt. Waves 1 to 2 ft.

WED
NW winds 5 to 10 kt...becoming N 10 to 15 kt after midnight. Waves 1 to 2 ft.

Winds and waves higher and visibilities lower in and near tstms.

---

ANZ543-110830
Tangier Sound and the inland waters surrounding Bloodsworth Island
327 PM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM EDT THIS EVENING THROUGH LATE TONIGHT

GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY MORNING

SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING

REST OF THIS AFTERNOON
E winds 15 kt. Waves 1 ft.

TONIGHT
E winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. Showers likely.

SUN
SE winds 20 to 25 kt with gusts to 35 kt... diminishing to 10 to 15 kt with gusts to 25 kt late. Waves 3 ft. Showers with a chance of tstms.

SUN NIGHT
S winds 10 to 15 kt...becoming SW after midnight. Gusts up to 20 kt. Waves 2 ft. Showers likely with a chance of tstms.

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

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

TUE
W winds 5 kt...becoming S 10 to 15 kt. Waves 1 ft.

WED
W winds 5 to 10 kt...becoming N 10 to 15 kt after midnight. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.