280
FZUS51 KLWX 170535
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
135 AM EDT WED SEP 17 2025
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.
ANZ500-172000-
135 AM EDT WED SEP 17 2025
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A COASTAL LOW OFF THE VIRGINIA TIDEWATER WILL DRIFT OFFSHORE
THROUGH TONIGHT. HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH
THIS EVENING. A COLD FRONT WILL APPROACH FROM THE WEST LATE IN THE
WEEK, AND MOVE ACROSS THE WATERS THIS WEEKEND.
ANZ535-172000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
135 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY.
WED
N WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO 2 FT.
SHOWERS. VSBY 1 TO 3 NM.
WED NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
PATCHY FOG. VSBY 1 TO 3 NM.
THU
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS AROUND 5 KT. WAVES 1 FT.
ANZ536-172000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
135 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
N WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY. VSBY 1 TO 3 NM.
WED...N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
DIMINISHING TO
10 KT IN THE AFTERNOON. WAVES 1 TO 2 FT. SHOWERS. VSBY 1 TO 3 NM.
WED NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
PATCHY FOG. VSBY 1 TO 3 NM.
THU
NW WINDS AROUND 5 KT. WAVES 1 FT.
THU NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 KT. WAVES LESS THAN 1 FT.
ANZ537-172000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
135 AM EDT WED SEP 17 2025
..GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 35 KT. WAVES 4 FT.
SHOWERS. VSBY 1 TO 3 NM.
WED...NE WINDS 15 TO 20 KT
DIMINISHING TO 10 KT LATE. GUSTS UP TO
25 KT. WAVES 2 TO 3 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. A CHANCE OF
SHOWERS. VSBY 1 TO 3 NM.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ530-172000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
135 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES 2 FT. SHOWERS
LIKELY.
WED...NE WINDS 15 TO 20 KT
DIMINISHING TO 10 KT LATE. GUSTS UP TO
25 KT. WAVES 2 FT. SHOWERS. VSBY 1 NM OR LESS.
WED NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ531-172000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
135 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
LIKELY. VSBY 1 TO 3 NM.
WED...NE WINDS 15 TO 20 KT. GUSTS UP TO 30 KT
DIMINISHING TO
20 KT IN THE LATE MORNING AND AFTERNOON. WAVES 2 TO 3 FT. SHOWERS
LIKELY. VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT...NE WINDS 10 TO 15 KT
BECOMING E 5 TO 10 KT. WAVES 1 TO
2 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ538-172000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
135 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY. VSBY 1 TO 3 NM.
WED
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO 2 FT.
SHOWERS. VSBY 1 TO 3 NM.
WED NIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES FLAT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ539-172000-
CHESTER RIVER TO QUEENSTOWN MD-
135 AM EDT WED SEP 17 2025
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
WITH A SLIGHT CHANCE OF TSTMS. VSBY 1 TO 3 NM.
WED...NE WINDS 15 TO 20 KT
DIMINISHING TO 10 KT LATE. GUSTS UP TO
25 KT. WAVES 2 TO 3 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-172000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
135 AM EDT WED SEP 17 2025
..GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT. SHOWERS
WITH A SLIGHT CHANCE OF TSTMS. VSBY 1 TO 3 NM.
WED...NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
15 KT WITH GUSTS TO 20 KT IN THE AFTERNOON. WAVES 4 FT...SUBSIDING
TO 2 FT IN THE AFTERNOON. SHOWERS. VSBY 1 NM OR LESS.
WED NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. VSBY 1 NM OR LESS.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT...NE WINDS 10 TO 15 KT
BECOMING E. WAVES 1 TO 2 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-172000-
EASTERN BAY-
135 AM EDT WED SEP 17 2025
..GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
WITH A SLIGHT CHANCE OF TSTMS. VSBY 1 TO 3 NM.
WED
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS. VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-172000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
135 AM EDT WED SEP 17 2025
..GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT...NE WINDS 30 KT. WAVES 5 FT
EXCEPT AROUND 3 FT NEAR
THE MOUTH OF THE CHOPTANK. SHOWERS WITH A SLIGHT CHANCE OF TSTMS.
VSBY 1 NM OR LESS.
WED...NE 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.
SHOWERS LIKELY. VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 2 FT. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT...NE WINDS 10 TO 15 KT
BECOMING E. WAVES 1 TO 2 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-172000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
135 AM EDT WED SEP 17 2025
..GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
WITH A SLIGHT CHANCE OF TSTMS. VSBY 1 TO 3 NM.
WED...NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 TO 15 KT WITH GUSTS TO 25 KT IN THE LATE MORNING AND AFTERNOON.
WAVES 2 TO 3 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. PATCHY FOG. VSBY 1 TO
3 NM.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 FT.
SAT...NE WINDS 10 TO 15 KT
BECOMING E. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-172000-
PATUXENT RIVER TO BROOMES ISLAND MD-
135 AM EDT WED SEP 17 2025
..GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 20 KT WITH GUSTS TO 30 KT. WAVES 1 FT.
SHOWERS. VSBY 1 TO 3 NM.
WED
NE WINDS 10 TO 15 KT. GUSTS UP TO 25 KT UNTIL LATE AFTERNOON.
WAVES 1 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY. VSBY
1 TO 3 NM.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ534-172000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
135 AM EDT WED SEP 17 2025
..GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 25 TO 30 KT. WAVES 5 FT. SHOWERS LIKELY. VSBY
1 NM OR LESS.
WED...NE WINDS 15 TO 20 KT
DIMINISHING TO 10 KT LATE. GUSTS UP TO
25 KT. WAVES 3 FT. SHOWERS LIKELY. VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 10 KT. GUSTS UP TO 20 KT UNTIL EARLY MORNING.
WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
W WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT...S WINDS 5 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 FT.
SAT
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
ANZ543-172000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
135 AM EDT WED SEP 17 2025
..GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
OVERNIGHT
NE WINDS 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
LIKELY WITH A SLIGHT CHANCE OF TSTMS. VSBY 1 NM OR LESS.
WED...NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
DIMINISHING TO
10 KT LATE. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
WED NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
VSBY 1 TO 3 NM.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
W WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT...SW WINDS 5 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 FT.
SAT
E WINDS 10 TO 15 KT. WAVES 1 FT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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