946
FZUS51 KLWX 202357
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
757 PM EDT MON APR 20 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.
ANZ500-210800-
757 PM EDT MON APR 20 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
HIGH PRESSURE WILL BUILD IN THROUGH TUESDAY. A WEAK COLD FRONT LOOKS
TO DROP IN FROM THE NORTH WEDNESDAY, THEN CROSS THE MID-ATLANTIC BY
THURSDAY. SMALL CRAFT ADVISORIES MAY BE NEEDED LATE TUESDAY INTO
WEDNESDAY IN SOUTH TO SOUTHWEST FLOW. ADDITIONAL SMALL CRAFT
ADVISORIES ARE POSSIBLE LATER THIS WEEK AND WEEKEND AS MULTIPLE
FRONTS AND WAVES OF LOW PRESSURE TRAVERSE THE REGION.
ANZ535-210800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
TONIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT THIS EVENING. WAVES
1 FT.
TUE
S WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SW WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY.
WED NIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE NIGHT.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
AFTERNOON. SHOWERS LIKELY THROUGH THE NIGHT.
ANZ536-210800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
TONIGHT...N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
DIMINISHING TO
5 KT LATE. WAVES 1 FT.
TUE...NE WINDS AROUND 5 KT
BECOMING S LATE. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
LIKELY.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT.
SAT...SE WINDS AROUND 5 KT
BECOMING NE. WAVES 1 FT. A CHANCE OF
SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE NIGHT.
ANZ537-210800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT TUESDAY
TONIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SE LATE. WAVES 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 2 FT.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS LIKELY.
WED NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
SE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT...E WINDS 10 TO 15 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH
THE NIGHT.
ANZ530-210800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
TONIGHT
N WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE...N WINDS AROUND 5 KT
BECOMING S LATE. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE NIGHT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE DAY, THEN SHOWERS LIKELY THROUGH THE NIGHT.
ANZ531-210800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
TONIGHT...N WINDS 10 TO 15 KT
BECOMING NE LATE. GUSTS UP TO
20 KT. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 TO 2 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE DAY. SHOWERS LIKELY THROUGH THE NIGHT.
ANZ538-210800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
TONIGHT
N WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE...E WINDS 5 KT
BECOMING SE LATE. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
NW WINDS 5 KT. WAVES FLAT.
THU NIGHT
SE WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS THROUGH
THE NIGHT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE DAY. SHOWERS LIKELY THROUGH THE NIGHT.
ANZ539-210800-
CHESTER RIVER TO QUEENSTOWN MD-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
TONIGHT...N WINDS 10 TO 15 KT
BECOMING NE LATE. GUSTS UP TO
20 KT. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SE WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS 5 KT. WAVES FLAT. A CHANCE OF SHOWERS THROUGH THE
NIGHT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE DAY, THEN SHOWERS LIKELY THROUGH THE NIGHT.
ANZ532-210800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT TUESDAY
TONIGHT...N WINDS 10 TO 15 KT
BECOMING NE LATE. GUSTS UP TO
20 KT. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SE IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WED
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 TO 2 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
SAT...E WINDS 10 TO 15 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS THROUGH THE DAY. SHOWERS LIKELY THROUGH THE
NIGHT.
ANZ540-210800-
EASTERN BAY-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
TONIGHT...N WINDS 10 TO 15 KT
BECOMING NE LATE. GUSTS UP TO
20 KT. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
THU
NW WINDS 5 KT. WAVES FLAT.
THU NIGHT
S WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE DAY, THEN SHOWERS LIKELY THROUGH THE NIGHT.
ANZ533-210800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT TUESDAY
TONIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO 3 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SE LATE. WAVES 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT. A
CHANCE OF SHOWERS.
WED NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE NIGHT.
SAT...E WINDS 10 TO 15 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH
THE NIGHT.
ANZ541-210800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT TUESDAY
TONIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT. A
CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
S WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
SAT...E WINDS 10 TO 15 KT
BECOMING NE 5 TO 10 KT AFTER MIDNIGHT.
WAVES 1 FT. A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY
THROUGH THE NIGHT.
ANZ542-210800-
PATUXENT RIVER TO BROOMES ISLAND MD-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
TONIGHT
N WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE...NE WINDS 5 KT
BECOMING SE LATE. WAVES 1 FT.
TUE NIGHT
S WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A CHANCE
OF SHOWERS.
WED NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
N WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
FRI
SE WINDS AROUND 5 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
AFTERNOON. SHOWERS LIKELY THROUGH THE NIGHT.
ANZ534-210800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT TUESDAY
TONIGHT
N WINDS 15 TO 20 KT. GUSTS UP TO 25 KT UNTIL EARLY
MORNING. WAVES 2 TO 3 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SE LATE. WAVES 1 TO 2 FT.
TUE NIGHT...S WINDS 15 TO 20 KT. GUSTS UP TO 20 KT
INCREASING TO
25 KT AFTER MIDNIGHT. WAVES 3 FT.
WED...SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING W 5 TO
10 KT IN THE AFTERNOON. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH
THE NIGHT.
ANZ543-210800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
757 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT TUESDAY
TONIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 TO 2 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING SW IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT.
WED...SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING W 5 TO
10 KT IN THE AFTERNOON. WAVES 3 FT...SUBSIDING TO 1 FT IN THE
AFTERNOON. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
SE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT...E WINDS 10 TO 15 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE
NIGHT.
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