452
FZUS51 KLWX 182058
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
458 PM EDT SAT APR 18 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.
ANZ500-190800-
458 PM EDT SAT APR 18 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A COLD FRONT APPROACHING THE APPALACHIANS WILL CROSS THE MID-
ATLANTIC TONIGHT, THEN MOVE OFFSHORE SUNDAY MORNING. A SECONDARY
COLD FRONT WILL FOLLOW IN ITS WAKE SUNDAY NIGHT INTO MONDAY MORNING.
HIGH PRESSURE WILL BUILD IN BEHIND THESE FRONTS LATE MONDAY THROUGH
TUESDAY. ANOTHER FRONT LOOKS TO DROP IN FROM THE NORTH WEDNESDAY.
SMALL CRAFT ADVISORIES MAY BE NEEDED MONDAY MORNING THROUGH MONDAY
EVENING IN NORTHWEST FLOW, AND LATE TUESDAY INTO WEDNESDAY IN SOUTH
TO SOUTHWEST FLOW.
ANZ535-190800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...
REST OF THIS AFTERNOON
SE WINDS 10 KT WITH GUSTS TO 25 KT. WAVES
1 FT.
TONIGHT...SE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
BECOMING NE
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 FT. SCATTERED SHOWERS.
SUN...NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 KT WITH GUSTS TO 20 KT LATE. WAVES 1 TO 2 FT. SHOWERS.
SUN NIGHT
NW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
MON NIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
TUE...SW WINDS AROUND 5 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
WED...SW WINDS 5 TO 10 KT
BECOMING N. WAVES 1 FT. A CHANCE OF
SHOWERS.
ANZ536-190800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...
REST OF THIS AFTERNOON
SE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT.
TONIGHT...SE WINDS 10 TO 15 KT
BECOMING W LATE. GUSTS UP TO
20 KT. WAVES 1 TO 2 FT.
SUN...NW WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 TO 15 KT WITH GUSTS TO 20 KT IN THE AFTERNOON. WAVES 3 FT...
SUBSIDING TO 1 FT IN THE AFTERNOON. SHOWERS.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
MON NIGHT...N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
DIMINISHING
TO 5 KT AFTER MIDNIGHT. WAVES 1 FT.
TUE...W WINDS AROUND 5 KT
BECOMING S. WAVES 1 FT.
WED...SW WINDS 5 TO 10 KT
BECOMING N. WAVES 1 FT. A CHANCE OF
SHOWERS.
ANZ537-190800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON
REST OF THIS AFTERNOON
SE WINDS 20 KT. WAVES 2 FT.
TONIGHT...SE WINDS 15 TO 20 KT
BECOMING SW 10 TO 15 KT LATE.
WAVES 2 FT.
SUN...NW WINDS 20 TO 25 KT
DIMINISHING TO 10 TO 15 KT LATE. WAVES
3 FT. NUMEROUS SHOWERS.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING SE IN THE AFTERNOON, THEN
BECOMING S 10 TO 15 KT. WAVES 1 TO 2 FT.
WED...SW WINDS 10 TO 15 KT
BECOMING N 5 TO 10 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS.
ANZ530-190800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...
REST OF THIS AFTERNOON
SE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT...SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING E
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 FT. SCATTERED SHOWERS. PATCHY
FOG. VSBY 1 NM OR LESS.
SUN
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SHOWERS. PATCHY DENSE FOG. VSBY 1 NM OR LESS.
SUN NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
MON NIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
TUE...W WINDS AROUND 5 KT
BECOMING S. WAVES 1 FT OR LESS.
WED...SW WINDS 5 TO 10 KT
BECOMING N. WAVES 1 FT OR LESS. A
CHANCE OF SHOWERS THROUGH THE DAY.
ANZ531-190800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...
REST OF THIS AFTERNOON
SE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT...SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING NE
5 TO 10 KT LATE. WAVES 1 TO 2 FT. SCATTERED SHOWERS.
SUN...NW WINDS 20 TO 25 KT
DIMINISHING TO 15 KT IN THE AFTERNOON.
GUSTS UP TO 30 KT...DIMINISHING TO 20 KT LATE. WAVES 3 FT. SHOWERS.
SUN NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 TO 2 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
TUE...N WINDS AROUND 5 KT
BECOMING S 10 TO 15 KT. WAVES 1 TO
2 FT.
WED...SW WINDS 10 TO 15 KT
BECOMING W 5 TO 10 KT IN THE
AFTERNOON, THEN BECOMING N. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
ANZ538-190800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...
REST OF THIS AFTERNOON
SE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT...SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING NE
5 KT AFTER MIDNIGHT. WAVES 1 FT. SCATTERED SHOWERS.
SUN
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 TO 2 FT.
SHOWERS.
SUN NIGHT
NW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT OR LESS.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
MON NIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
TUE...E WINDS AROUND 5 KT
BECOMING S. WAVES 1 FT OR LESS.
WED...SW WINDS 5 TO 10 KT
BECOMING N. WAVES 1 FT OR LESS. A
CHANCE OF SHOWERS.
ANZ539-190800-
CHESTER RIVER TO QUEENSTOWN MD-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...
REST OF THIS AFTERNOON
SE WINDS 10 KT. WAVES 1 FT.
TONIGHT...SE WINDS 5 TO 10 KT
BECOMING N LATE. WAVES 1 FT.
SUN
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS.
SUN NIGHT
NW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 TO 2 FT.
TUE...W WINDS 5 KT
BECOMING S 10 TO 15 KT. WAVES 1 TO 2 FT.
WED...SW WINDS 10 TO 15 KT...BECOMING N 5 KT. WAVES 1 TO 2 FT
SUBSIDING TO FLAT AFTER MIDNIGHT. A CHANCE OF SHOWERS.
ANZ532-190800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...
REST OF THIS AFTERNOON
SE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TONIGHT...SE WINDS 10 TO 15 KT
BECOMING N LATE. GUSTS UP TO
20 KT. WAVES 2 TO 3 FT.
SUN...NW WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 TO 15 KT WITH GUSTS TO 20 KT LATE. WAVES 3 FT. SCATTERED SHOWERS.
SUN NIGHT
NW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING SE 10 TO 15 KT IN THE AFTERNOON
AND EVENING, THEN BECOMING S AFTER MIDNIGHT. WAVES 1 TO 2 FT.
WED...SW WINDS 10 TO 15 KT
BECOMING N 5 KT. WAVES 1 TO 2 FT. A
CHANCE OF SHOWERS.
ANZ540-190800-
EASTERN BAY-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...
REST OF THIS AFTERNOON
SE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT...SE WINDS 10 TO 15 KT
BECOMING NW LATE. GUSTS UP TO
20 KT. WAVES 1 FT.
SUN...NW WINDS 20 TO 25 KT
DIMINISHING TO 10 TO 15 KT IN THE
AFTERNOON. WAVES 2 FT. SHOWERS.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING S 10 TO 15 KT. WAVES 1 FT OR
LESS...BUILDING TO 2 FT AFTER MIDNIGHT.
WED...SW WINDS 10 TO 15 KT...BECOMING N 5 KT. WAVES 1 TO 2 FT
SUBSIDING TO FLAT AFTER MIDNIGHT. A CHANCE OF SHOWERS.
ANZ533-190800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...
REST OF THIS AFTERNOON
SE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TONIGHT...SE WINDS 15 TO 20 KT
BECOMING SW 10 TO 15 KT LATE.
WAVES 2 TO 3 FT.
SUN...NW WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 TO 15 KT WITH GUSTS TO 20 KT LATE. WAVES 3 FT. SHOWERS.
SUN NIGHT
NW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
MON
NW WINDS 15 TO 20 KT. WAVES 2 FT.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING SE 10 TO 15 KT IN THE AFTERNOON
AND EVENING, THEN BECOMING S 15 TO 20 KT AFTER MIDNIGHT. WAVES 1 TO
2 FT.
WED...SW WINDS 15 TO 20 KT
DIMINISHING TO 5 TO 10 KT IN THE
AFTERNOON, THEN BECOMING N. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
ANZ541-190800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...
REST OF THIS AFTERNOON
SE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT...SE WINDS 10 TO 15 KT
BECOMING SW LATE. GUSTS UP TO
20 KT. WAVES 2 FT.
SUN...NW WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 TO 15 KT WITH GUSTS TO 20 KT LATE. WAVES 3 FT. SHOWERS.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING SW IN THE AFTERNOON, THEN
BECOMING S 15 TO 20 KT. WAVES 1 FT OR LESS... BUILDING TO 2 FT AFTER
MIDNIGHT.
WED...SW WINDS 10 TO 15 KT
BECOMING N 5 KT. WAVES 1 TO 2 FT. A
CHANCE OF SHOWERS.
ANZ542-190800-
PATUXENT RIVER TO BROOMES ISLAND MD-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...
REST OF THIS AFTERNOON
SE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT...SE WINDS 10 TO 15 KT
BECOMING SW LATE. GUSTS UP TO
20 KT. WAVES 1 FT. SCATTERED SHOWERS.
SUN...NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
DIMINISHING TO
10 KT LATE. WAVES 1 FT. SHOWERS.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
MON NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
WED...SW WINDS 5 TO 10 KT
BECOMING N. WAVES 1 FT. A CHANCE OF
SHOWERS.
ANZ534-190800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON
REST OF THIS AFTERNOON
SE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TONIGHT...SE WINDS 15 TO 20 KT
BECOMING S LATE. WAVES 3 FT.
SUN...W WINDS 15 TO 20 KT
BECOMING NW 20 TO 25 KT IN THE LATE
MORNING AND AFTERNOON. GUSTS UP TO 30 KT. WAVES 4 FT. NUMEROUS
SHOWERS.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO 3 FT.
MON NIGHT
N WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
TUE...N WINDS 10 TO 15 KT
BECOMING S 15 TO 20 KT. WAVES 1 TO
2 FT...BUILDING TO 3 FT AFTER MIDNIGHT.
WED...SW WINDS 15 TO 20 KT
BECOMING N 5 TO 10 KT. WAVES 2 TO
3 FT...SUBSIDING TO 1 FT. A CHANCE OF SHOWERS.
ANZ543-190800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
458 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON
REST OF THIS AFTERNOON
SE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT...SE WINDS 15 TO 20 KT
BECOMING S LATE. WAVES 2 FT.
SUN...W WINDS 15 TO 20 KT
BECOMING NW 20 TO 25 KT IN THE LATE
MORNING AND AFTERNOON. GUSTS UP TO 30 KT. WAVES 2 TO 3 FT. NUMEROUS
SHOWERS.
SUN NIGHT
NW WINDS 10 TO 15 KT. WAVES 1 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
TUE...N WINDS 10 TO 15 KT
BECOMING SW 5 KT IN THE AFTERNOON, THEN
BECOMING S 15 TO 20 KT. WAVES 1 TO 2 FT.
WED...SW WINDS 15 TO 20 KT
BECOMING W 5 TO 10 KT IN THE EVENING,
THEN BECOMING N AFTER MIDNIGHT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
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