227
FZUS51 KLWX 012057
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
457 PM EDT TUE SEP 1 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.
ANZ500-020800-
457 PM EDT TUE SEP 1 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
HIGH PRESSURE WILL BUILD SOUTH OF THE WATERS THROUGH MID WEEK WITH
SCATTERED DIURNAL SHOWERS AND THUNDERSTORMS EXPECTED IN A HOT AND
HUMID AIR MASS. SPECIAL MARINE WARNINGS MAY BE NEEDED EACH AFTERNOON
THROUGH AT LEAST FRIDAY FOR STRONG THUNDERSTORMS MOVING OVER THE
WATERS. SMALL CRAFT ADVISORIES MAY BE NEEDED FRIDAY NIGHT INTO
SATURDAY.
ANZ535-020800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
457 PM EDT TUE SEP 1 2026
REST OF THIS AFTERNOON
W WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE
OF SHOWERS AND TSTMS.
TONIGHT
W WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
WED
NE WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
THU
SW WINDS AROUND 5 KT. WAVES 1 FT.
THU NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-020800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
457 PM EDT TUE SEP 1 2026
REST OF THIS AFTERNOON
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A
SLIGHT CHANCE OF SHOWERS.
TONIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT.
WED
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU
SW WINDS AROUND 5 KT. WAVES 1 FT.
THU NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT.
FRI
NW WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-020800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
457 PM EDT TUE SEP 1 2026
REST OF THIS AFTERNOON
S WINDS 5 KT. WAVES LESS THAN 1 FT. A
SLIGHT CHANCE OF SHOWERS.
TONIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
WED...N WINDS 5 KT
BECOMING E LATE. WAVES 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
AND TSTMS.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-020800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
457 PM EDT TUE SEP 1 2026
...SEVERE THUNDERSTORM WATCH 638 IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...
REST OF THIS AFTERNOON
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A
SLIGHT CHANCE OF SHOWERS AND TSTMS.
TONIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
WED
E WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
THU
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-020800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
457 PM EDT TUE SEP 1 2026
REST OF THIS AFTERNOON
SW WINDS 10 KT. WAVES 1 FT. A SLIGHT
CHANCE OF SHOWERS AND TSTMS.
TONIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
WED
E WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-020800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
457 PM EDT TUE SEP 1 2026
REST OF THIS AFTERNOON
W WINDS 5 KT. WAVES LESS THAN 1 FT. A
SLIGHT CHANCE OF SHOWERS AND TSTMS.
TONIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
WED
E WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
THU
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-020800-
CHESTER RIVER TO QUEENSTOWN MD-
457 PM EDT TUE SEP 1 2026
...SEVERE THUNDERSTORM WATCH 638 IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...
REST OF THIS AFTERNOON
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A
SLIGHT CHANCE OF SHOWERS AND TSTMS.
TONIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
WED
E WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
THU
S WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS AND TSTMS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-020800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
457 PM EDT TUE SEP 1 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE
OF SHOWERS AND TSTMS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING N AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS AND TSTMS.
WED
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU
S WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS AND TSTMS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-020800-
EASTERN BAY-
457 PM EDT TUE SEP 1 2026
...SEVERE THUNDERSTORM WATCH 638 IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE
OF SHOWERS AND TSTMS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING NE AFTER MIDNIGHT. WAVES
1 FT OR LESS. A CHANCE OF SHOWERS AND TSTMS.
WED
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
THU
S WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS AND TSTMS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
AND TSTMS THROUGH THE NIGHT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-020800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
457 PM EDT TUE SEP 1 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE
OF SHOWERS AND TSTMS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING N LATE. WAVES 1 FT. A
CHANCE OF SHOWERS AND TSTMS.
WED
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-020800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
457 PM EDT TUE SEP 1 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE
OF SHOWERS AND TSTMS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING N LATE. WAVES 1 FT. A
CHANCE OF SHOWERS AND TSTMS.
WED
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU
S WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS AND TSTMS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-020800-
PATUXENT RIVER TO BROOMES ISLAND MD-
457 PM EDT TUE SEP 1 2026
REST OF THIS AFTERNOON
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A
SLIGHT CHANCE OF SHOWERS.
TONIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
WED
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-020800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
457 PM EDT TUE SEP 1 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE
OF SHOWERS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING W LATE. WAVES 1 FT. A
CHANCE OF SHOWERS.
WED...N WINDS 5 KT
BECOMING E LATE. WAVES 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 2 FT.
THU
S WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-020800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
457 PM EDT TUE SEP 1 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE
OF SHOWERS.
TONIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED...N WINDS 5 KT
BECOMING E LATE. WAVES 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
W WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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