017
FZUS51 KLWX 130259
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1059 PM EDT TUE MAY 12 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.
ANZ500-130800-
1059 PM EDT TUE MAY 12 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
HIGH PRESSURE WILL BUILD IN FROM THE WEST THROUGH TONIGHT BEFORE
ANOTHER FRONTAL SYSTEM APPROACHES WEDNESDAY INTO WEDNESDAY NIGHT.
HIGH PRESSURE WILL RETURN FRIDAY. SMALL CRAFT ADVISORIES MAY BE
NEEDED AT TIMES WEDNESDAY NIGHT THROUGH FRIDAY.
ANZ535-130800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
1059 PM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH
WEDNESDAY AFTERNOON...
REST OF TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
WED NIGHT...SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT
BECOMING NW
LATE. WAVES 1 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ536-130800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
1059 PM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH
WEDNESDAY AFTERNOON...
REST OF TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
WED NIGHT...SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT
BECOMING NW
LATE. WAVES 1 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ537-130800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
1059 PM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH
WEDNESDAY AFTERNOON...
REST OF TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES
1 TO 2 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
WED NIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 2 TO 3 FT. SHOWERS LIKELY.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ530-130800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
1059 PM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH
WEDNESDAY AFTERNOON...
REST OF TONIGHT...S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT
INCREASING TO 25 KT LATE. WAVES 1 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
WED NIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
BECOMING W
5 TO 10 KT LATE. WAVES 1 TO 2 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUN
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ531-130800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
1059 PM EDT TUE MAY 12 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
1 TO 2 FT...BUILDING TO 3 FT LATE.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. A CHANCE
OF SHOWERS.
WED NIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING W
5 TO 10 KT AFTER MIDNIGHT. WAVES 2 TO 3 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ538-130800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
1059 PM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH
WEDNESDAY AFTERNOON...
REST OF TONIGHT
S WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO 2 FT. A
CHANCE OF SHOWERS.
WED NIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING W
5 KT AFTER MIDNIGHT. WAVES 1 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI
NW WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ539-130800-
CHESTER RIVER TO QUEENSTOWN MD-
1059 PM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH
WEDNESDAY AFTERNOON...
REST OF TONIGHT...S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT
INCREASING TO 25 KT LATE. WAVES 1 TO 2 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
WED NIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
BECOMING W
5 TO 10 KT LATE. WAVES 1 TO 2 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI...NW WINDS 15 KT
DIMINISHING TO 5 TO 10 KT IN THE AFTERNOON.
GUSTS UP TO 20 KT. WAVES 2 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES FLAT.
ANZ532-130800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
1059 PM EDT TUE MAY 12 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
2 TO 3 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. A CHANCE
OF SHOWERS.
WED NIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING W
5 TO 10 KT AFTER MIDNIGHT. WAVES 2 TO 3 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ540-130800-
EASTERN BAY-
1059 PM EDT TUE MAY 12 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF TONIGHT
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO
2 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
WED NIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT. SHOWERS LIKELY.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS 5 KT. WAVES LESS THAN 1 FT.
ANZ533-130800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
1059 PM EDT TUE MAY 12 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
2 TO 3 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
WED NIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 2 TO 3 FT. SHOWERS LIKELY.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 15 TO 20 KT. WAVES 2 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ541-130800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
1059 PM EDT TUE MAY 12 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
1 TO 2 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
WED NIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT. SHOWERS LIKELY.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ542-130800-
PATUXENT RIVER TO BROOMES ISLAND MD-
1059 PM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH
WEDNESDAY AFTERNOON...
REST OF TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED NIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING W
5 KT LATE. WAVES 1 FT. SHOWERS LIKELY.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 10 KT. WAVES 1 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT.
ANZ534-130800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
1059 PM EDT TUE MAY 12 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
2 TO 3 FT.
WED...S WINDS 15 TO 20 KT
BECOMING 20 KT LATE. GUSTS UP TO
25 KT...INCREASING TO 30 KT LATE. WAVES 3 FT.
WED NIGHT...S WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING
TO 10 TO 15 KT WITH GUSTS TO 20 KT AFTER MIDNIGHT, THEN BECOMING W
LATE. WAVES 3 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 15 TO 20 KT. WAVES 3 FT.
FRI
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SUN...SW WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
ANZ543-130800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
1059 PM EDT TUE MAY 12 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
1 TO 2 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
WED NIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 30 KT
BECOMING SW
10 KT LATE. WAVES 2 TO 3 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 15 TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 15 TO 20 KT. WAVES 2 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
SAT
SW WINDS 10 TO 15 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
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