320
FZUS51 KLWX 110900
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
500 AM EDT MON MAY 11 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.
ANZ500-120000-
500 AM EDT MON MAY 11 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
LOW PRESSURE WILL RIDE ALONG A COLD FRONT TO THE SOUTH TODAY. HIGH
PRESSURE WILL BUILD IN FROM THE WEST ON TUESDAY BEFORE ANOTHER
FRONTAL SYSTEM APPROACHES WEDNESDAY INTO WEDNESDAY NIGHT. HIGH
PRESSURE WILL RETURN FRIDAY. SMALL CRAFT ADVISORIES MAY BE NEEDED
AT TIMES TONIGHT THROUGH TUESDAY MORNING AND AGAIN TUESDAY NIGHT
THROUGH FRIDAY.
ANZ535-120000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT. A SLIGHT CHANCE OF SHOWERS.
TODAY...N WINDS 5 TO 10 KT WITH GUSTS TO 20 KT
BECOMING W LATE.
WAVES 1 FT. A CHANCE OF SHOWERS.
TONIGHT
W WINDS AROUND 5 KT. WAVES 1 FT.
TUE
NW WINDS AROUND 5 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
WAVES 1 FT.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT. SHOWERS.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ536-120000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
1 FT. A SLIGHT CHANCE OF SHOWERS.
TODAY...N WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
BECOMING W 5 KT
IN THE AFTERNOON. WAVES 1 FT. SHOWERS LIKELY.
TONIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
WAVES 1 FT.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS LIKELY.
WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT. SHOWERS.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ537-120000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT.
TODAY...N WINDS 15 TO 20 KT WITH GUSTS TO 30 KT
DIMINISHING TO
5 TO 10 KT IN THE AFTERNOON. WAVES 2 TO 3 FT. SHOWERS.
TONIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
W WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
ANZ530-120000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT. A SLIGHT CHANCE OF SHOWERS.
TODAY...NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING NW
5 TO 10 KT IN THE AFTERNOON. WAVES 1 FT.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
TUE NIGHT...S WINDS AROUND 5 KT
INCREASING TO 10 TO 15 KT WITH
GUSTS TO 20 KT AFTER MIDNIGHT. WAVES 1 FT OR LESS.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY.
WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-120000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
3 FT. A SLIGHT CHANCE OF SHOWERS.
TODAY...NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
BECOMING SE
5 KT IN THE AFTERNOON. WAVES 3 FT...SUBSIDING TO 1 FT IN THE
AFTERNOON. A CHANCE OF SHOWERS.
TONIGHT...W WINDS 5 TO 10 KT
BECOMING N AFTER MIDNIGHT. WAVES
1 TO 2 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING W IN THE AFTERNOON. WAVES 1 TO
2 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. SHOWERS
LIKELY.
WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING.
FRI...NW WINDS 10 TO 15 KT...BECOMING W 5 KT. WAVES 1 TO 2 FT
SUBSIDING TO FLAT AFTER MIDNIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-120000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT. A SLIGHT CHANCE OF SHOWERS.
TODAY
NE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE MORNING.
WAVES 1 FT OR LESS. A CHANCE OF SHOWERS.
TONIGHT...W WINDS 5 KT
BECOMING N LATE. WAVES 1 FT OR LESS.
TUE
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
TUE NIGHT
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
WAVES 1 FT.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
LIKELY.
WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-120000-
CHESTER RIVER TO QUEENSTOWN MD-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT. A SLIGHT CHANCE OF SHOWERS.
TODAY...NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
BECOMING NW
5 KT IN THE AFTERNOON. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
TONIGHT...W WINDS 5 TO 10 KT
BECOMING N LATE. WAVES 1 FT.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY.
WED NIGHT...S WINDS 10 TO 15 KT
BECOMING SW 5 TO 10 KT AFTER
MIDNIGHT. GUSTS UP TO 20 KT. WAVES 1 TO 2 FT. SHOWERS WITH A CHANCE
OF TSTMS.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING.
FRI...NW WINDS 10 TO 15 KT...BECOMING W 5 KT. WAVES 1 TO 2 FT
SUBSIDING TO FLAT AFTER MIDNIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-120000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 20 KT WITH GUSTS TO 30 KT. WAVES
3 FT. A SLIGHT CHANCE OF SHOWERS.
TODAY...N WINDS 15 TO 20 KT WITH GUSTS TO 30 KT
BECOMING NE 5 TO
10 KT EARLY IN THE AFTERNOON, THEN BECOMING SE LATE. WAVES 3 FT...
SUBSIDING TO 1 FT IN THE AFTERNOON. A CHANCE OF SHOWERS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. WAVES 1 FT.
TUE...N WINDS 10 TO 15 KT
BECOMING NE 5 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT...S WINDS 5 TO 10 KT
INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. WAVES 1 FT...BUILDING TO 3 FT AFTER MIDNIGHT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. SHOWERS
LIKELY.
WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI...NW WINDS 10 TO 15 KT
BECOMING W 5 KT. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-120000-
EASTERN BAY-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT. A SLIGHT CHANCE OF SHOWERS.
TODAY...N WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
BECOMING NW 5 KT
IN THE AFTERNOON. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
TONIGHT...W WINDS 5 TO 10 KT
BECOMING N LATE. WAVES 1 FT.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY.
WED NIGHT...S WINDS 10 TO 15 KT
BECOMING SW 5 TO 10 KT AFTER
MIDNIGHT. GUSTS UP TO 20 KT. WAVES 1 TO 2 FT. SHOWERS WITH A CHANCE
OF TSTMS.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING.
FRI...NW WINDS 10 TO 15 KT
BECOMING W 5 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-120000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 20 KT WITH GUSTS TO 30 KT. WAVES
3 FT. A SLIGHT CHANCE OF SHOWERS.
TODAY...N WINDS 15 TO 20 KT WITH GUSTS TO 30 KT
DIMINISHING TO
5 TO 10 KT IN THE AFTERNOON. WAVES 4 FT... SUBSIDING TO 2 FT IN THE
AFTERNOON. SHOWERS LIKELY.
TONIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
TUE...N WINDS 10 TO 15 KT
BECOMING NE 5 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT...S WINDS 5 TO 10 KT
INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. SHOWERS
LIKELY.
WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
NW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
FRI...NW WINDS 10 TO 15 KT
BECOMING W 5 KT. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-120000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 20 KT WITH GUSTS TO 30 KT. WAVES
2 FT. A SLIGHT CHANCE OF SHOWERS.
TODAY...N WINDS 15 TO 20 KT WITH GUSTS TO 30 KT
DIMINISHING TO
5 TO 10 KT IN THE AFTERNOON. WAVES 1 TO 2 FT. SHOWERS LIKELY.
TONIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY.
WED NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
NW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS IN
THE MORNING.
FRI...NW WINDS 10 TO 15 KT
BECOMING W AROUND 5 KT. WAVES 1 TO
2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-120000-
PATUXENT RIVER TO BROOMES ISLAND MD-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
1 FT.
TODAY...N WINDS 10 TO 15 KT WITH GUSTS TO 30 KT
DIMINISHING TO
5 KT LATE. WAVES 1 FT. SHOWERS.
TONIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE
NE WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT. SHOWERS
LIKELY.
WED NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS WITH A CHANCE
OF TSTMS.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
W WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-120000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
3 FT.
TODAY...N WINDS 15 TO 20 KT WITH GUSTS TO 30 KT
DIMINISHING TO
5 TO 10 KT LATE. WAVES 4 FT...SUBSIDING TO 2 FT IN THE AFTERNOON.
SHOWERS.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
TUE
N WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
TUE NIGHT...S WINDS 15 TO 20 KT. WAVES 1 FT
BUILDING TO 3 FT
AFTER MIDNIGHT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. A CHANCE
OF SHOWERS.
WED NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS.
THU
NW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS IN
THE MORNING.
FRI...NW WINDS 10 TO 15 KT
BECOMING W 5 TO 10 KT. WAVES 1 TO
2 FT.
ANZ543-120000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
500 AM EDT MON MAY 11 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TODAY
N WINDS 10 TO 15 KT WITH GUSTS TO 30 KT. WAVES 1 TO 2 FT.
SHOWERS.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 15 TO 20 KT. WAVES 1 TO 2 FT.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
WED NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS.
THU
NW WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING.
FRI...NW WINDS 10 TO 15 KT
BECOMING W 5 TO 10 KT. WAVES 1 FT.
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