738
FZUS51 KLWX 180627
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
227 AM EDT SUN OCT 18 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.
ANZ500-182000-
227 AM EDT SUN OCT 18 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
HIGH PRESSURE WILL BUILD IN FROM THE CENTRAL U.S. THROUGH TODAY,
THEN LINGER EARLY NEXT WEEK AS LOW PRESSURE DEVELOPS AND MEANDERS
OFF THE CAROLINA COAST. ADDITIONAL SMALL CRAFT ADVISORIES WILL
LIKELY BE NEEDED AT TIMES FROM THROUGH MUCH OF NEXT WEEK.
ANZ535-182000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
227 AM EDT SUN OCT 18 2026
OVERNIGHT
N WINDS 5 KT. WAVES LESS THAN 1 FT.
SUN
N WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT.
MON
N WINDS 5 TO 10 KT. WAVES 1 FT.
MON NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE
N WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WED
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ536-182000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
227 AM EDT SUN OCT 18 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...
OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
MON
N WINDS 10 KT. WAVES 1 FT.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE NIGHT
N WINDS 10 TO 15 KT. WAVES 1 FT.
WED
N WINDS 10 TO 15 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ537-182000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
227 AM EDT SUN OCT 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
N WINDS 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
SUN...NE WINDS 15 TO 20 KT. GUSTS UP TO 30 KT
DIMINISHING TO
20 KT IN THE AFTERNOON. WAVES 3 FT.
SUN NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT.
MON
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
MON NIGHT
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
TUE
N WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
TUE NIGHT...N WINDS 10 TO 15 KT
INCREASING TO 20 TO 25 KT AFTER
MIDNIGHT. WAVES 2 FT...BUILDING TO 4 FT AFTER MIDNIGHT.
WED
N WINDS 20 TO 25 KT. WAVES 3 FT.
THU
N WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
ANZ530-182000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
227 AM EDT SUN OCT 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING
OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL LATE AFTERNOON.
WAVES 1 FT.
SUN NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
MON
N WINDS 5 TO 10 KT. WAVES 1 FT.
MON NIGHT
N WINDS 15 TO 20 KT. WAVES 1 FT.
TUE
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
N WINDS 10 TO 15 KT. WAVES 1 FT.
THU
N WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ531-182000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
227 AM EDT SUN OCT 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING
OVERNIGHT
N WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SUN
NE WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE MORNING. WAVES
2 TO 3 FT.
SUN NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
MON
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
N WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
TUE
N WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
TUE NIGHT
N WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
WED
N WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
THU
N WINDS 15 TO 20 KT. WAVES 2 FT.
ANZ538-182000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
227 AM EDT SUN OCT 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING
OVERNIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN
NE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL LATE AFTERNOON.
WAVES 1 FT.
SUN NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
MON
N WINDS 5 TO 10 KT. WAVES 1 FT.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
N WINDS 10 TO 15 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ539-182000-
CHESTER RIVER TO QUEENSTOWN MD-
227 AM EDT SUN OCT 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING
OVERNIGHT
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SUN
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SUN NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
MON
N WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
TUE
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TUE NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WED
N WINDS 10 TO 15 KT. WAVES 2 FT.
THU
N WINDS 10 TO 15 KT. WAVES 2 FT.
ANZ532-182000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
227 AM EDT SUN OCT 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 20 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
SUN...NE WINDS 15 TO 20 KT. GUSTS UP TO 30 KT
DIMINISHING TO
20 KT IN THE AFTERNOON. WAVES 2 TO 3 FT.
SUN NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON
N WINDS 15 TO 20 KT. WAVES 2 FT.
MON NIGHT
N WINDS 20 TO 25 KT. WAVES 2 TO 3 FT.
TUE
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
TUE NIGHT
N WINDS 20 TO 25 KT. WAVES 2 TO 3 FT.
WED...N WINDS 20 TO 25 KT
DIMINISHING TO 15 TO 20 KT. WAVES 2 TO
3 FT.
THU
N WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
ANZ540-182000-
EASTERN BAY-
227 AM EDT SUN OCT 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SUN
NE WINDS 10 TO 15 KT. GUSTS UP TO 25 KT UNTIL LATE AFTERNOON.
WAVES 1 TO 2 FT.
SUN NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
MON
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
MON NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 TO
2 FT.
TUE
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TUE NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 TO
2 FT.
WED
N WINDS 15 TO 20 KT. WAVES 1 TO 2 FT.
THU
N WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
ANZ533-182000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
227 AM EDT SUN OCT 18 2026
..GALE WARNING IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
THIS AFTERNOON...
OVERNIGHT...NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT
EXCEPT
AROUND 3 FT NEAR THE MOUTH OF THE CHOPTANK.
SUN...NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 TO 15 KT WITH GUSTS TO 20 KT IN THE AFTERNOON. WAVES 3 FT.
SUN NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT.
MON
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
MON NIGHT
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
TUE
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
TUE NIGHT
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
WED
N WINDS 20 TO 25 KT. WAVES 3 FT.
THU...N WINDS 20 TO 25 KT
DIMINISHING TO 15 TO 20 KT. WAVES
3 FT...SUBSIDING TO 2 TO 3 FT.
ANZ541-182000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
227 AM EDT SUN OCT 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 20 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SUN...NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 KT WITH GUSTS TO 20 KT LATE. WAVES 2 FT.
SUN NIGHT...NE WINDS 15 TO 20 KT. GUSTS UP TO 20 KT
INCREASING TO
25 KT LATE. WAVES 1 TO 2 FT.
MON
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
MON NIGHT
N WINDS 20 TO 25 KT. WAVES 2 TO 3 FT.
TUE
N WINDS 20 TO 25 KT. WAVES 2 TO 3 FT.
TUE NIGHT
N WINDS 20 TO 25 KT. GUSTS UP TO 30 KT AFTER MIDNIGHT.
WAVES 2 TO 3 FT.
WED...N WINDS 20 TO 25 KT
DIMINISHING TO 10 TO 15 KT IN THE
EVENING, THEN INCREASING TO 20 TO 25 KT AFTER MIDNIGHT. WAVES 2 TO
3 FT.
THU...N WINDS 20 TO 25 KT
DIMINISHING TO 15 TO 20 KT. WAVES 2 TO
3 FT.
ANZ542-182000-
PATUXENT RIVER TO BROOMES ISLAND MD-
227 AM EDT SUN OCT 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
SUN
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
SUN NIGHT...NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT
INCREASING TO
25 KT LATE. WAVES 1 FT.
MON
N WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
MON NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
TUE
N WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
TUE NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
WED
N WINDS 15 TO 20 KT. WAVES 1 FT.
THU
N WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ534-182000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
227 AM EDT SUN OCT 18 2026
..GALE WARNING IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
THIS AFTERNOON...
OVERNIGHT
N WINDS 25 KT WITH GUSTS TO 35 KT. WAVES 5 FT.
SUN...NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
BECOMING N 15 KT
WITH GUSTS TO 25 KT IN THE AFTERNOON. WAVES 5 FT...SUBSIDING TO 3 FT
IN THE AFTERNOON.
SUN NIGHT
NE WINDS 20 TO 25 KT. WAVES 3 FT.
MON
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
MON NIGHT
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
TUE
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
TUE NIGHT
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
WED
N WINDS 25 TO 30 KT. WAVES 4 FT.
THU
N WINDS 20 TO 25 KT. WAVES 3 FT.
ANZ543-182000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
227 AM EDT SUN OCT 18 2026
..GALE WARNING IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
THIS AFTERNOON...
OVERNIGHT
N WINDS 25 KT WITH GUSTS TO 35 KT. WAVES 3 FT.
SUN...N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
BECOMING NE 10 TO
15 KT WITH GUSTS TO 25 KT IN THE AFTERNOON. WAVES 2 TO 3 FT.
SUN NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
MON
N WINDS 20 TO 25 KT. WAVES 2 TO 3 FT.
MON NIGHT
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 TO
3 FT.
TUE
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
TUE NIGHT
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 TO
3 FT.
WED
N WINDS 20 TO 25 KT. WAVES 2 TO 3 FT.
THU...N WINDS 20 TO 25 KT
DIMINISHING TO 15 TO 20 KT. WAVES 2 TO
3 FT.
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