900
FZUS51 KLWX 312357
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
757 PM EDT MON AUG 31 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.
ANZ500-010800-
757 PM EDT MON AUG 31 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.
ANZ535-010800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A SLIGHT CHANCE
OF SHOWERS AND TSTMS THIS EVENING.
TUE
W WINDS AROUND 5 KT. WAVES 1 FT.
TUE NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
NW WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
S 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.
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.
ANZ536-010800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS THIS EVENING.
TUE
W WINDS AROUND 5 KT. WAVES 1 FT.
TUE NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
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
SW 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 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-010800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
757 PM EDT MON AUG 31 2026
TONIGHT...S WINDS 5 TO 10 KT
BECOMING SW LATE. WAVES 1 FT. A
SLIGHT CHANCE OF SHOWERS AND TSTMS THIS EVENING.
TUE
SW WINDS AROUND 5 KT. WAVES 1 FT.
TUE NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
WED
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
IN THE AFTERNOON. A CHANCE OF SHOWERS AND TSTMS THROUGH THE NIGHT.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-010800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS 5 KT. WAVES FLAT. A SLIGHT CHANCE OF SHOWERS AND
TSTMS THIS EVENING.
TUE
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
AND TSTMS.
TUE NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
WED
NE WINDS 5 KT. WAVES FLAT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-010800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS 5 KT. WAVES FLAT. A SLIGHT CHANCE OF SHOWERS AND
TSTMS THIS EVENING.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
TUE NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
WED
NE WINDS 5 KT. WAVES FLAT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
N WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-010800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS 5 KT. WAVES FLAT. A SLIGHT CHANCE OF SHOWERS AND
TSTMS THIS EVENING.
TUE
W WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE NIGHT
W WINDS AROUND 5 KT. 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 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS AND TSTMS.
THU
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
THU NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. 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.
ANZ539-010800-
CHESTER RIVER TO QUEENSTOWN MD-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS 5 KT. WAVES FLAT. A SLIGHT CHANCE OF SHOWERS AND
TSTMS THIS EVENING.
TUE
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
WED
NE WINDS AROUND 5 KT. WAVES FLAT.
WED NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS AND TSTMS.
THU
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
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.
ANZ532-010800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS THIS EVENING.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT...S WINDS 5 TO 10 KT
BECOMING W AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS AND TSTMS.
WED
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI...NW WINDS 5 KT
BECOMING N 10 TO 15 KT AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS IN THE AFTERNOON. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
SAT
N WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-010800-
EASTERN BAY-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS THIS EVENING.
TUE
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
WED
N WINDS AROUND 5 KT. WAVES FLAT.
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
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. 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.
ANZ533-010800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS THIS EVENING.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT...S WINDS 5 TO 10 KT
BECOMING NW LATE. WAVES 1 FT. A
CHANCE OF SHOWERS AND TSTMS.
WED
N WINDS 5 KT. WAVES FLAT.
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
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
AFTERNOON. A CHANCE OF SHOWERS AND TSTMS THROUGH THE NIGHT.
SAT
NE WINDS 10 TO 15 KT. WAVES 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-010800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS THIS EVENING.
TUE
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE NIGHT...SW WINDS 5 TO 10 KT
BECOMING NW LATE. WAVES 1 FT. A
CHANCE OF SHOWERS AND TSTMS.
WED
N WINDS AROUND 5 KT. WAVES FLAT.
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
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI...NW WINDS 5 KT
BECOMING N 10 TO 15 KT AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS AND TSTMS THROUGH THE NIGHT.
SAT
N WINDS 10 TO 15 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-010800-
PATUXENT RIVER TO BROOMES ISLAND MD-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS THIS EVENING.
TUE
SW WINDS AROUND 5 KT. WAVES 1 FT.
TUE NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
WED
N WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU
SW WINDS AROUND 5 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
AFTERNOON. A CHANCE OF SHOWERS AND TSTMS THROUGH THE NIGHT.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-010800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
757 PM EDT MON AUG 31 2026
TONIGHT...S WINDS 5 TO 10 KT
BECOMING SW LATE. WAVES 1 FT.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT...S WINDS 5 TO 10 KT
BECOMING W LATE. WAVES 1 FT. A
CHANCE OF SHOWERS.
WED
NW WINDS 5 KT. WAVES LESS THAN 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.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
AFTERNOON. A CHANCE OF SHOWERS AND TSTMS THROUGH THE NIGHT.
SAT
NE WINDS 10 TO 15 KT. WAVES 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-010800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
757 PM EDT MON AUG 31 2026
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED
W WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
THU
SW 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. A CHANCE OF SHOWERS IN THE
AFTERNOON. A CHANCE OF SHOWERS AND TSTMS THROUGH THE NIGHT.
SAT
N WINDS 10 TO 15 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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