819
FZUS51 KLWX 271459
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1059 AM EDT MON APR 27 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.
ANZ500-272000-
1059 AM EDT MON APR 27 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
HIGH PRESSURE WILL BUILD TO THE NORTH BEFORE ANOTHER FRONTAL SYSTEM
APPROACHES FROM THE WEST BY THE MIDDLE OF THE WEEK. A TROUGH OF LOW
PRESSURE LINGERS THROUGH FRIDAY. SMALL CRAFT ADVISORIES ARE LIKELY
NEEDED WEDNESDAY AFTERNOON DUE TO INCREASING SOUTHEASTERLY WINDS.
HAZARDOUS MARINE CONDITIONS LIKELY PERSIST THROUGH THE LATE WEEK
TIMEFRAME.
ANZ535-272000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
1059 AM EDT MON APR 27 2026
REST OF TODAY
E WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
TUE
S WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
TUE NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
WED
SE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT. SHOWERS.
WED NIGHT...S WINDS 5 TO 10 KT
BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. WAVES 1 FT. SHOWERS.
THU...NW WINDS 15 TO 20 KT
DIMINISHING TO 10 KT AFTER MIDNIGHT.
WAVES 1 FT. A CHANCE OF SHOWERS IN THE MORNING.
FRI
NW WINDS 10 TO 15 KT. WAVES 1 FT.
ANZ536-272000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
1059 AM EDT MON APR 27 2026
REST OF TODAY
E WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
TUE
S WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
TUE NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
WED
SE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
WED NIGHT...S WINDS 10 KT
BECOMING NW 15 TO 20 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT. SHOWERS.
THU
NW WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS IN
THE MORNING.
FRI
NW WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
ANZ537-272000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
1059 AM EDT MON APR 27 2026
REST OF TODAY
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS AROUND 5 KT. WAVES 1 FT.
TUE...SE WINDS AROUND 5 KT
INCREASING TO 5 TO 10 KT LATE. WAVES
1 FT OR LESS.
TUE NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS.
WED NIGHT...S WINDS 10 TO 15 KT
BECOMING W 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. WAVES 2 FT. SHOWERS WITH A CHANCE OF
TSTMS.
THU
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS IN
THE MORNING.
FRI
NW WINDS 10 TO 15 KT. WAVES 2 FT. A CHANCE OF SHOWERS THROUGH
THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-272000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
1059 AM EDT MON APR 27 2026
REST OF TODAY
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TUE
S WINDS AROUND 5 KT. WAVES 1 FT.
TUE NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
WED
SE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
WED NIGHT...SE WINDS 10 TO 15 KT
BECOMING NW AFTER MIDNIGHT.
GUSTS UP TO 20 KT. WAVES 1 FT. SHOWERS.
THU
NW WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS IN THE
MORNING.
FRI
NW WINDS 15 TO 20 KT. WAVES 1 TO 2 FT.
ANZ531-272000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
1059 AM EDT MON APR 27 2026
REST OF TODAY
NE WINDS 5 KT. WAVES FLAT.
TONIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
TUE
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
TUE NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT. SHOWERS.
WED NIGHT...SE WINDS 10 TO 15 KT
BECOMING W 15 TO 20 KT AFTER
MIDNIGHT. WAVES 2 FT. SHOWERS.
THU
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS IN
THE MORNING.
FRI
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
ANZ538-272000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
1059 AM EDT MON APR 27 2026
REST OF TODAY
E WINDS 5 KT. WAVES FLAT.
TONIGHT
SE WINDS AROUND 5 KT. WAVES FLAT.
TUE
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS.
TUE NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
WED
SE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT. SHOWERS.
WED NIGHT...SE WINDS 10 KT
BECOMING W AFTER MIDNIGHT. GUSTS UP TO
20 KT. WAVES 1 FT. SHOWERS.
THU
NW WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS IN
THE MORNING.
FRI...NW WINDS 15 TO 20 KT
DIMINISHING TO 10 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT.
ANZ539-272000-
CHESTER RIVER TO QUEENSTOWN MD-
1059 AM EDT MON APR 27 2026
REST OF TODAY
N WINDS 5 KT. WAVES FLAT.
TONIGHT
SE WINDS AROUND 5 KT. WAVES FLAT.
TUE
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TUE NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
WED
SE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT. SHOWERS.
WED NIGHT...SE WINDS 10 TO 15 KT
BECOMING W AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 1 TO 2 FT. SHOWERS.
THU
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS IN
THE MORNING.
FRI
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
ANZ532-272000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
1059 AM EDT MON APR 27 2026
REST OF TODAY
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
TUE...SW WINDS AROUND 5 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT OR LESS.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED...SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT
BUILDING TO 3 FT IN THE AFTERNOON. SHOWERS.
WED NIGHT...SE WINDS 15 TO 20 KT
BECOMING W AFTER MIDNIGHT. WAVES
2 TO 3 FT. SHOWERS.
THU
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS IN
THE MORNING.
FRI
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
ANZ540-272000-
EASTERN BAY-
1059 AM EDT MON APR 27 2026
REST OF TODAY
N WINDS 5 KT. WAVES FLAT.
TONIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TUE...S WINDS AROUND 5 KT
INCREASING TO 5 TO 10 KT LATE. WAVES
1 FT OR LESS.
TUE NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT. SHOWERS.
WED NIGHT...SE WINDS 10 TO 15 KT
BECOMING W AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 1 TO 2 FT. SHOWERS.
THU
NW WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS IN THE
MORNING.
FRI
NW WINDS 15 TO 20 KT. WAVES 1 TO 2 FT.
ANZ533-272000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
1059 AM EDT MON APR 27 2026
REST OF TODAY
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS AROUND 5 KT. WAVES 1 FT.
TUE...W WINDS AROUND 5 KT
BECOMING S IN THE AFTERNOON. WAVES 1 FT
OR LESS.
TUE NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED...SE WINDS 5 TO 10 KT
INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. WAVES 1 FT...BUILDING TO 3 FT IN THE AFTERNOON. SHOWERS.
WED NIGHT...SE WINDS 15 TO 20 KT
BECOMING W AFTER MIDNIGHT. GUSTS
UP TO 25 KT. WAVES 2 TO 3 FT. SHOWERS.
THU
NW WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS IN THE
MORNING.
FRI
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS
AFTER MIDNIGHT.
ANZ541-272000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
1059 AM EDT MON APR 27 2026
REST OF TODAY
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TUE...E WINDS AROUND 5 KT
BECOMING S IN THE AFTERNOON. WAVES 1 FT
OR LESS.
TUE NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS.
WED NIGHT...SE WINDS 10 TO 15 KT
BECOMING W 15 TO 20 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. WAVES 2 FT. SHOWERS.
THU
NW WINDS 20 TO 25 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS IN
THE MORNING.
FRI
NW WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
ANZ542-272000-
PATUXENT RIVER TO BROOMES ISLAND MD-
1059 AM EDT MON APR 27 2026
REST OF TODAY
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS AROUND 5 KT. WAVES 1 FT.
TUE
SE WINDS AROUND 5 KT. WAVES 1 FT.
TUE NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
WED
SE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT. SHOWERS.
WED NIGHT...SE WINDS 10 TO 15 KT
BECOMING W AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 1 FT. SHOWERS.
THU
NW WINDS 15 TO 20 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING.
FRI
NW WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
ANZ534-272000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
1059 AM EDT MON APR 27 2026
REST OF TODAY
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
TONIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT.
TUE...NE WINDS AROUND 5 KT
BECOMING SE IN THE AFTERNOON. WAVES
1 FT OR LESS.
TUE NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED...SE WINDS 5 TO 10 KT
INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. WAVES 1 FT...BUILDING TO 3 FT IN THE AFTERNOON. SHOWERS.
WED NIGHT...SE WINDS 15 TO 20 KT
BECOMING W 20 TO 25 KT AFTER
MIDNIGHT. WAVES 3 FT. SHOWERS.
THU
NW WINDS 20 TO 25 KT. WAVES 4 FT. A CHANCE OF SHOWERS IN THE
MORNING.
FRI
NW WINDS 15 TO 20 KT. WAVES 3 FT. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
ANZ543-272000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
1059 AM EDT MON APR 27 2026
REST OF TODAY
NE WINDS 10 KT. WAVES 1 FT.
TONIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT.
TUE...E WINDS AROUND 5 KT
BECOMING SE LATE. WAVES 1 FT OR LESS.
TUE NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS LIKELY.
WED NIGHT...SE WINDS 15 TO 20 KT
BECOMING W AFTER MIDNIGHT. GUSTS
UP TO 25 KT. WAVES 2 FT. SHOWERS.
THU
NW WINDS 20 TO 25 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS IN
THE MORNING.
FRI...NW WINDS 20 TO 25 KT
DIMINISHING TO 15 TO 20 KT. WAVES
2 FT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
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