504
FZUS51 KLWX 190258
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1058 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-
1058 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-
1058 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT SUNDAY THROUGH
SUNDAY AFTERNOON...
REST OF TONIGHT...E WINDS 5 TO 10 KT
BECOMING N 15 KT LATE. 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 EARLY 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
W WINDS AROUND 5 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED...SW WINDS 5 TO 10 KT
BECOMING N. WAVES 1 FT. A CHANCE OF
SHOWERS.
THU
W WINDS AROUND 5 KT. WAVES 1 FT.
ANZ536-190800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
1058 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT SUNDAY THROUGH
SUNDAY AFTERNOON...
REST OF TONIGHT...S WINDS 10 KT
BECOMING W LATE. GUSTS UP TO
20 KT. WAVES 1 FT. SCATTERED SHOWERS.
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. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED...SW WINDS 5 TO 10 KT
BECOMING N. WAVES 1 FT. A CHANCE OF
SHOWERS.
THU
N WINDS AROUND 5 KT. WAVES 1 FT.
ANZ537-190800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
1058 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON
REST OF TONIGHT...S WINDS 15 KT
BECOMING SW LATE. GUSTS UP TO
20 KT. WAVES 2 FT. ISOLATED SHOWERS.
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. 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
BECOMING N 5 TO 10 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS.
THU...NE WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
ANZ530-190800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
1058 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT SUNDAY THROUGH
SUNDAY AFTERNOON...
REST OF TONIGHT...E WINDS 5 TO 10 KT
BECOMING NE LATE. WAVES
1 FT. PATCHY DENSE FOG. SCATTERED SHOWERS. 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 WITH GUSTS TO 20 KT
BECOMING W
5 TO 10 KT AFTER MIDNIGHT. 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. WAVES FLAT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED...SW WINDS 5 TO 10 KT
BECOMING N. WAVES 1 FT OR LESS. A
CHANCE OF SHOWERS THROUGH THE DAY.
THU
W WINDS AROUND 5 KT. WAVES FLAT.
ANZ531-190800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
1058 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT SUNDAY THROUGH
SUNDAY AFTERNOON...
REST OF TONIGHT...E WINDS 10 KT
BECOMING NE 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 WITH GUSTS TO 20 KT
BECOMING W
5 TO 10 KT AFTER MIDNIGHT. 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 IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 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.
THU
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ538-190800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
1058 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT SUNDAY THROUGH
SUNDAY AFTERNOON...
REST OF TONIGHT...E WINDS 5 TO 10 KT
BECOMING NE LATE. 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. WAVES 1 FT OR LESS.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED...SW WINDS 5 TO 10 KT
BECOMING N. WAVES 1 FT OR LESS. A
CHANCE OF SHOWERS.
THU
SW WINDS AROUND 5 KT. WAVES FLAT.
ANZ539-190800-
CHESTER RIVER TO QUEENSTOWN MD-
1058 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT SUNDAY THROUGH
SUNDAY AFTERNOON...
REST OF TONIGHT...SE WINDS 10 KT
BECOMING N LATE. WAVES 1 FT.
ISOLATED SHOWERS.
SUN
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS.
SUN NIGHT...NW WINDS 10 TO 15 KT
BECOMING W 5 TO 10 KT AFTER
MIDNIGHT. 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. WAVES LESS THAN 1 FT.
TUE NIGHT
S WINDS 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.
THU
SW WINDS 5 KT. WAVES FLAT.
ANZ532-190800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
1058 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT SUNDAY THROUGH
SUNDAY AFTERNOON...
REST OF TONIGHT...SE WINDS 10 TO 15 KT
BECOMING N LATE. GUSTS UP
TO 20 KT. WAVES 1 TO 2 FT. ISOLATED SHOWERS.
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
BECOMING W 5 TO 10 KT AFTER
MIDNIGHT. 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 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
BECOMING N 5 KT. WAVES 1 TO 2 FT. A
CHANCE OF SHOWERS.
THU...NE WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT OR LESS.
ANZ540-190800-
EASTERN BAY-
1058 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT SUNDAY THROUGH
SUNDAY AFTERNOON...
REST OF TONIGHT...SE WINDS 10 KT
BECOMING NW LATE. WAVES 1 FT.
ISOLATED SHOWERS.
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 SW IN THE AFTERNOON. WAVES 1 FT
OR LESS.
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...BECOMING N 5 KT. WAVES 1 TO 2 FT
SUBSIDING TO FLAT AFTER MIDNIGHT. A CHANCE OF SHOWERS.
THU
SW WINDS AROUND 5 KT. WAVES FLAT.
ANZ533-190800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
1058 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT SUNDAY THROUGH
SUNDAY AFTERNOON...
REST OF TONIGHT...SE WINDS 15 KT
BECOMING SW LATE. GUSTS UP TO
20 KT. WAVES 2 TO 3 FT. ISOLATED SHOWERS.
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
BECOMING W 5 TO 10 KT AFTER
MIDNIGHT. 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 IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 15 TO 20 KT. WAVES 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.
THU...NE WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
ANZ541-190800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
1058 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT SUNDAY THROUGH
SUNDAY AFTERNOON...
REST OF TONIGHT...SE WINDS 15 KT
BECOMING SW LATE. GUSTS UP TO
20 KT. WAVES 1 TO 2 FT. ISOLATED SHOWERS.
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. WAVES 1 FT
OR LESS.
TUE NIGHT
S WINDS 15 TO 20 KT. 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.
THU
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ542-190800-
PATUXENT RIVER TO BROOMES ISLAND MD-
1058 PM EDT SAT APR 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT SUNDAY THROUGH
SUNDAY AFTERNOON...
REST OF TONIGHT...SE WINDS 10 KT
BECOMING SW LATE. 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 SE IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED...SW WINDS 5 TO 10 KT
BECOMING N. WAVES 1 FT. A CHANCE OF
SHOWERS.
THU
E WINDS 5 KT. WAVES LESS THAN 1 FT.
ANZ534-190800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
1058 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON
REST OF TONIGHT
S WINDS 15 TO 20 KT. WAVES 3 FT. ISOLATED
SHOWERS.
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 5 TO 10 KT IN THE AFTERNOON.
WAVES 1 TO 2 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
BECOMING N 5 TO 10 KT. WAVES 2 TO
3 FT...SUBSIDING TO 1 FT. A CHANCE OF SHOWERS.
THU...N WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
ANZ543-190800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
1058 PM EDT SAT APR 18 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON
REST OF TONIGHT
S WINDS 15 TO 20 KT. WAVES 2 FT. ISOLATED
SHOWERS.
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.
WAVES 1 FT.
TUE NIGHT
S WINDS 15 TO 20 KT. GUSTS UP TO 25 KT AFTER MIDNIGHT.
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.
THU...N WINDS 5 TO 10 KT
BECOMING W IN THE AFTERNOON, THEN
BECOMING S. WAVES 1 FT.
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