545
FZUS51 KLWX 171157
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
757 AM EDT THU SEP 17 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.
ANZ500-172000-
757 AM EDT THU SEP 17 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
CANADIAN HIGH PRESSURE WILL SLOWLY PULL AWAY FROM THE ATLANTIC
COAST TODAY. AT THE SAME TIME, A STALLED FRONTAL SYSTEM OVER THE
GREAT LAKES EVENTUALLY CROSSES THE LOCAL WATERS BY FRIDAY MORNING.
HIGH PRESSURE BRIEFLY BUILDS OVER THE NORTHEASTERN U.S. ON SATURDAY
BEFORE ANOTHER FRONTAL SYSTEM LOOMS NEARBY ON SUNDAY AND INTO EARLY
NEXT WEEK. SMALL CRAFT ADVISORIES MAY BE NEEDED ON FRIDAY BEHIND THE
COLD FRONT. WIND GUSTS REMAINS ELEVATED OVER THE WEEKEND AND INTO
EARLY NEXT WEEK WHICH MAY PROMPT ADDITIONAL ADVISORIES.
ANZ535-172000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
757 AM EDT THU SEP 17 2026
TODAY
S WINDS 5 KT. WAVES LESS THAN 1 FT. ISOLATED SHOWERS AND
TSTMS THIS AFTERNOON.
TONIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT. SCATTERED SHOWERS AND
TSTMS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
SUN...SW WINDS 5 TO 10 KT
BECOMING N AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS THROUGH THE NIGHT. A CHANCE OF TSTMS THROUGH THE
NIGHT.
MON
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-172000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
757 AM EDT THU SEP 17 2026
TODAY
S WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN...SW WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. A CHANCE OF SHOWERS AND TSTMS
THROUGH THE NIGHT.
MON
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-172000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
757 AM EDT THU SEP 17 2026
TODAY
S WINDS 5 TO 10 KT. WAVES 1 FT. SCATTERED SHOWERS THIS
MORNING.
TONIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
N WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SUN...S WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. A CHANCE OF SHOWERS AND TSTMS
THROUGH THE NIGHT.
MON
NE WINDS 10 TO 15 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-172000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
757 AM EDT THU SEP 17 2026
TODAY
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. ISOLATED SHOWERS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING NW LATE. WAVES 1 FT.
SCATTERED TSTMS WITH A CHANCE OF SHOWERS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
N WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING NW. WAVES 1 FT. A CHANCE OF
SHOWERS IN THE MORNING, THEN SHOWERS LIKELY.
MON
NE WINDS 10 TO 15 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-172000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
757 AM EDT THU SEP 17 2026
TODAY
S WINDS 10 KT. WAVES 1 FT. SCATTERED SHOWERS, MAINLY THIS
MORNING.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING NW LATE. WAVES 1 FT.
SCATTERED TSTMS WITH A CHANCE OF SHOWERS.
FRI
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING W IN THE EVENING, THEN
BECOMING N AFTER MIDNIGHT. WAVES 2 FT. SHOWERS LIKELY. A CHANCE OF
TSTMS THROUGH THE NIGHT.
MON
NE WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS THROUGH
THE DAY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-172000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
757 AM EDT THU SEP 17 2026
TODAY
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SCATTERED SHOWERS
THIS MORNING, THEN ISOLATED SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING NW LATE. WAVES 1 FT OR
LESS. SCATTERED SHOWERS AND TSTMS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING NW 5 TO 10 KT. WAVES 1 FT.
SHOWERS LIKELY. A CHANCE OF TSTMS THROUGH THE NIGHT.
MON
NE WINDS 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-172000-
CHESTER RIVER TO QUEENSTOWN MD-
757 AM EDT THU SEP 17 2026
TODAY
S WINDS 10 KT. WAVES 1 FT. SCATTERED SHOWERS THIS MORNING.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING NW LATE. WAVES 1 FT.
FRI
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING W 5 TO 10 KT IN THE EVENING,
THEN BECOMING N 10 TO 15 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT. A
CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY WITH A CHANCE OF
TSTMS THROUGH THE NIGHT.
MON
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS
THROUGH THE DAY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-172000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
757 AM EDT THU SEP 17 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM EDT THIS AFTERNOON
THROUGH THIS EVENING...
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SCATTERED SHOWERS, MAINLY THIS MORNING.
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING W
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT.
FRI
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SAT
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING W IN THE EVENING, THEN
BECOMING N AFTER MIDNIGHT. WAVES 2 FT. A CHANCE OF SHOWERS IN THE
AFTERNOON. SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE NIGHT.
MON...NE WINDS 10 TO 15 KT
BECOMING E. WAVES 2 FT. A CHANCE OF
SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-172000-
EASTERN BAY-
757 AM EDT THU SEP 17 2026
TODAY
S WINDS 10 KT. WAVES 1 FT. SCATTERED SHOWERS THIS MORNING.
TONIGHT...S WINDS 5 TO 10 KT
BECOMING NW LATE. WAVES 1 FT.
FRI
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING SW IN THE EVENING, THEN
BECOMING N AFTER MIDNIGHT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS IN
THE AFTERNOON. SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE
NIGHT.
MON
NE WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-172000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
757 AM EDT THU SEP 17 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM EDT THIS AFTERNOON
THROUGH THIS EVENING...
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SCATTERED SHOWERS THIS MORNING.
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING W
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT.
FRI
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING NW AFTER MIDNIGHT. WAVES 2 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY WITH A CHANCE
OF TSTMS THROUGH THE NIGHT.
MON
NE WINDS 10 TO 15 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-172000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
757 AM EDT THU SEP 17 2026
TODAY
S WINDS 10 KT. WAVES 1 FT. SCATTERED SHOWERS THIS MORNING.
TONIGHT...S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT
BECOMING W
LATE. WAVES 1 FT.
FRI
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING SW IN THE EVENING, THEN
BECOMING NW AFTER MIDNIGHT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS IN
THE AFTERNOON. SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE
NIGHT.
MON
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-172000-
PATUXENT RIVER TO BROOMES ISLAND MD-
757 AM EDT THU SEP 17 2026
TODAY
S WINDS 5 TO 10 KT. WAVES 1 FT. SCATTERED SHOWERS THIS
MORNING.
TONIGHT...S WINDS 5 TO 10 KT
BECOMING W LATE. WAVES 1 FT.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN...S WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY WITH A CHANCE
OF TSTMS THROUGH THE NIGHT.
MON
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-172000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
757 AM EDT THU SEP 17 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM EDT THIS AFTERNOON
THROUGH THIS EVENING...
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SCATTERED SHOWERS THIS MORNING.
TONIGHT...S WINDS 10 TO 15 KT
BECOMING W 5 TO 10 KT LATE. GUSTS
UP TO 20 KT. WAVES 2 FT.
FRI
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SAT
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT. WAVES 2 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING NW AFTER MIDNIGHT. WAVES 2 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY WITH A CHANCE
OF TSTMS THROUGH THE NIGHT.
MON
NE WINDS 10 TO 15 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-172000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
757 AM EDT THU SEP 17 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM EDT THIS AFTERNOON
THROUGH THIS EVENING...
TODAY
S WINDS 10 KT. WAVES 1 FT. SCATTERED SHOWERS THIS MORNING.
TONIGHT...S WINDS 10 TO 15 KT
BECOMING SW 5 TO 10 KT LATE. GUSTS
UP TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING W AFTER MIDNIGHT. WAVES 1 TO
2 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE NIGHT.
MON
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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