730
FZUS51 KLWX 121500
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1100 AM 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.
ANZ500-122000-
1100 AM 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 TODAY 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.
ANZ535-122000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
WEDNESDAY AFTERNOON...
REST OF TODAY
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
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 1 TO 2 FT. A
CHANCE OF SHOWERS.
WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI...NW WINDS 10 TO 15 KT
BECOMING W AROUND 5 KT AFTER MIDNIGHT.
WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-122000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
WEDNESDAY AFTERNOON...
REST OF TODAY
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
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. WAVES 1 FT. SHOWERS WITH A CHANCE
OF TSTMS.
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
BECOMING SW AROUND 5 KT AFTER
MIDNIGHT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-122000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
WEDNESDAY AFTERNOON...
REST OF TODAY...NE WINDS 5 KT
BECOMING SE LATE. WAVES 1 FT.
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO 2 FT.
WED
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
WED NIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
BECOMING SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 2 TO 3 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT. WAVES 2 FT.
FRI...NW WINDS 10 TO 15 KT
BECOMING SW AROUND 5 KT. WAVES 1 TO
2 FT...SUBSIDING TO FLAT AFTER MIDNIGHT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
ANZ530-122000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
WEDNESDAY AFTERNOON...
REST OF TODAY
W WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. 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 SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT. SHOWERS.
THU
NW WINDS 5 TO 10 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
BECOMING W AROUND 5 KT AFTER MIDNIGHT.
WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ531-122000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH WEDNESDAY AFTERNOON...
REST OF TODAY...NE WINDS 5 KT
BECOMING SE LATE. WAVES 1 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 FT
BUILDING TO 3 FT AFTER MIDNIGHT.
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 SW
10 TO 15 KT AFTER MIDNIGHT. WAVES 2 TO 3 FT. SHOWERS WITH A CHANCE
OF TSTMS.
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
BECOMING W AROUND 5 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT...SUBSIDING TO FLAT AFTER MIDNIGHT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-122000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
WEDNESDAY AFTERNOON...
REST OF TODAY...NE WINDS 5 KT
BECOMING SE LATE. WAVES 1 FT OR
LESS.
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. A CHANCE
OF SHOWERS.
WED NIGHT...S WINDS 10 TO 15 KT
BECOMING W 5 TO 10 KT AFTER
MIDNIGHT. GUSTS UP TO 20 KT. WAVES 1 FT. SHOWERS WITH A CHANCE OF
TSTMS.
THU
NW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING LIGHT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-122000-
CHESTER RIVER TO QUEENSTOWN MD-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
WEDNESDAY AFTERNOON...
REST OF TODAY
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS 10 TO 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. A CHANCE
OF SHOWERS.
WED NIGHT...S WINDS 10 TO 15 KT
BECOMING SW 5 TO 10 KT AFTER
MIDNIGHT. GUSTS UP TO 20 KT. WAVES 2 FT. SHOWERS WITH A CHANCE OF
TSTMS.
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
BECOMING W AROUND 5 KT. WAVES 1 TO
2 FT...SUBSIDING TO FLAT AFTER MIDNIGHT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-122000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH WEDNESDAY AFTERNOON...
REST OF TODAY
E WINDS 5 KT. WAVES LESS THAN 1 FT.
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 SW
10 TO 15 KT AFTER MIDNIGHT. WAVES 2 TO 3 FT. SHOWERS WITH A CHANCE
OF TSTMS.
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...BECOMING W 5 KT. WAVES 1 TO 2 FT
SUBSIDING TO FLAT AFTER MIDNIGHT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-122000-
EASTERN BAY-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH WEDNESDAY AFTERNOON...
REST OF TODAY
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS 10 TO 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. A CHANCE
OF SHOWERS.
WED NIGHT...S WINDS 10 TO 15 KT
BECOMING SW AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 1 TO 2 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
NW WINDS 10 TO 15 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...BECOMING W 5 KT. WAVES 1 TO 2 FT
SUBSIDING TO FLAT AFTER MIDNIGHT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-122000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH WEDNESDAY AFTERNOON...
REST OF TODAY
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS 15 TO 20 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
BECOMING SW 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. WAVES 2 TO 3 FT. SHOWERS WITH A CHANCE
OF TSTMS.
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
BECOMING W AROUND 5 KT. WAVES 1 TO
2 FT...SUBSIDING TO FLAT AFTER MIDNIGHT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-122000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH WEDNESDAY AFTERNOON...
REST OF TODAY
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS 15 TO 20 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
10 TO 15 KT AFTER MIDNIGHT. WAVES 2 FT. SHOWERS.
THU
NW WINDS 10 TO 15 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 TO 20 KT
BECOMING W AROUND 5 KT. WAVES 1 TO
2 FT...SUBSIDING TO FLAT AFTER MIDNIGHT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
ANZ542-122000-
PATUXENT RIVER TO BROOMES ISLAND MD-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH
WEDNESDAY AFTERNOON...
REST OF TODAY
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE LATE
EVENING AND OVERNIGHT. WAVES 1 FT.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
WED NIGHT...S 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.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI...NW WINDS 10 TO 15 KT
BECOMING W AROUND 5 KT. WAVES 1 FT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-122000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH WEDNESDAY AFTERNOON...
REST OF TODAY
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
WED...S WINDS 15 TO 20 KT. 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
BECOMING SW
10 TO 15 KT WITH GUSTS TO 20 KT AFTER MIDNIGHT. WAVES 3 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
FRI...NW WINDS 15 TO 20 KT...BECOMING W 5 KT. WAVES 2 TO 3 FT
SUBSIDING TO 1 FT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ543-122000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
1100 AM EDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM EDT THIS EVENING
THROUGH WEDNESDAY AFTERNOON...
REST OF TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS 15 TO 20 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
BECOMING SW AFTER MIDNIGHT. GUSTS
UP TO 25 KT. 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
BECOMING W 5 KT. WAVES 1 TO 2 FT.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
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