574
FZUS51 KLWX 301202
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
802 AM EDT THU APR 30 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.
ANZ500-302000-
802 AM EDT THU APR 30 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
BEHIND A COLD FRONT WHICH EXITS THE WATERS EARLY THIS MORNING, A
TROUGH OF LOW PRESSURE LINGERS THROUGH THE REMAINDER OF THE WEEK. 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 NEED TO BE EXTENDED INTO TONIGHT, WITH
ADDITIONAL ADVISORIES POSSIBLE ON SUNDAY AND MONDAY.
ANZ535-302000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY...NW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT
INCREASING TO
25 KT LATE. WAVES 1 FT.
TONIGHT
NW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT.
FRI
W WINDS AROUND 5 KT. WAVES 1 FT.
FRI NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS AROUND 5 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
BECOMING SW AROUND 5 KT AFTER
MIDNIGHT. WAVES 1 FT.
MON
SW WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ536-302000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TONIGHT...NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
DIMINISHING
TO 5 KT LATE. WAVES 1 FT.
FRI
W WINDS AROUND 5 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 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
BECOMING S AROUND 5 KT AFTER MIDNIGHT.
WAVES 1 FT.
MON
SW WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ537-302000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TONIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING SE LATE. WAVES 1 FT OR LESS.
FRI NIGHT...SE WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT. RAIN LIKELY.
SAT NIGHT
N WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF RAIN.
SUN...NW WINDS 10 TO 15 KT
BECOMING S AROUND 5 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT.
MON
SW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
ANZ530-302000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY...NW WINDS 5 TO 10 KT
INCREASING TO 15 KT LATE. GUSTS UP TO
20 KT. WAVES 1 FT.
TONIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
SAT
NW WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF RAIN.
SAT NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW AROUND 5 KT AFTER
MIDNIGHT. WAVES 1 FT OR LESS.
MON
SW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
ANZ531-302000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY...NW WINDS 5 TO 10 KT
INCREASING TO 15 KT LATE. GUSTS UP TO
20 KT. WAVES 2 FT.
TONIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 2 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF RAIN.
SAT NIGHT
NW WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF RAIN.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW 5 KT AFTER MIDNIGHT. WAVES
1 TO 2 FT.
MON
S WINDS 10 TO 15 KT. WAVES 2 FT.
ANZ538-302000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY...NW WINDS 5 TO 10 KT
INCREASING TO 15 KT LATE. GUSTS UP TO
20 KT. WAVES 1 FT.
TONIGHT...NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
DIMINISHING
TO 5 KT LATE. WAVES 1 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES FLAT. A CHANCE OF RAIN.
SAT NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW AROUND 5 KT AFTER
MIDNIGHT. WAVES 1 FT OR LESS.
MON
SW WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ539-302000-
CHESTER RIVER TO QUEENSTOWN MD-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY
NW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TONIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 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
BECOMING SW 5 KT AFTER MIDNIGHT. WAVES
1 TO 2 FT.
MON
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
ANZ532-302000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY...NW WINDS 5 TO 10 KT
INCREASING TO 15 KT LATE. GUSTS UP TO
20 KT. WAVES 2 FT.
TONIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT.
FRI NIGHT...SW WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF RAIN.
SAT NIGHT
NW WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF RAIN.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW 5 TO 10 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT.
MON
S WINDS 10 TO 15 KT. WAVES 2 FT.
ANZ540-302000-
EASTERN BAY-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY...NW WINDS 5 TO 10 KT
INCREASING TO 15 KT LATE. GUSTS UP TO
20 KT. WAVES 1 TO 2 FT.
TONIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES FLAT. 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
BECOMING SW AROUND 5 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT.
MON
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
ANZ533-302000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TONIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT.
FRI NIGHT...S WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF RAIN.
SAT NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT. A CHANCE OF RAIN.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW 5 TO 10 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT.
MON
S WINDS 15 TO 20 KT. WAVES 2 FT.
ANZ541-302000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY...NW WINDS 5 TO 10 KT
INCREASING TO 15 KT LATE. GUSTS UP TO
20 KT. WAVES 2 FT.
TONIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING S LATE. WAVES 1 FT.
FRI NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF RAIN.
SAT NIGHT
NW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF
RAIN.
SUN...NW WINDS 10 TO 15 KT
BECOMING SW 5 KT AFTER MIDNIGHT. WAVES
1 TO 2 FT.
MON
S WINDS 15 TO 20 KT. WAVES 1 TO 2 FT.
ANZ542-302000-
PATUXENT RIVER TO BROOMES ISLAND MD-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY
NW WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. RAIN LIKELY.
SAT NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF RAIN.
SUN...NW WINDS 10 TO 15 KT
BECOMING W AROUND 5 KT. WAVES 1 FT.
MON
SW WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ534-302000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY
NW WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO 3 FT.
TONIGHT
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING S LATE. WAVES 1 TO 2 FT.
FRI NIGHT...S WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT. RAIN LIKELY.
SAT NIGHT...N WINDS 5 TO 10 KT
BECOMING NW 15 TO 20 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT. A CHANCE OF RAIN.
SUN...NW WINDS 15 TO 20 KT...BECOMING SW 5 TO 10 KT. WAVES 3 FT
SUBSIDING TO 1 FT.
MON
S WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
ANZ543-302000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
802 AM EDT THU APR 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING
TODAY
NW WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TONIGHT
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING SW LATE. WAVES 1 FT.
FRI NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT. RAIN LIKELY.
SAT NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF RAIN.
SUN...NW WINDS 15 TO 20 KT
BECOMING SW 5 TO 10 KT. WAVES 1 TO
2 FT.
MON
S WINDS 15 TO 20 KT. WAVES 2 FT.
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