797
FZUS51 KLWX 211827
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
227 PM EDT FRI AUG 21 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.
ANZ500-220800-
227 PM EDT FRI AUG 21 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
WEAK AREAS OF LOW PRESSURE WILL TRAVERSE THE WATERS DURING THE
WEEKEND KEEPING STORMY WEATHER THROUGH SUNDAY. WEAK HIGH PRESSURE
BUILDS OVER THE WATERS FOR EARLY NEXT WEEK BRINGING FAIR WEATHER.
ANZ535-220800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS. WIDESPREAD
SHOWERS.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT. WIDESPREAD SHOWERS. AREAS OF
FOG.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SCATTERED
SHOWERS.
SUN
W WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS AROUND 5 KT. WAVES 1 FT.
TUE
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ536-220800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 5 KT. WAVES LESS THAN 1 FT. ISOLATED
SHOWERS.
TONIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT. WIDESPREAD SHOWERS. AREAS OF
FOG.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT. SCATTERED SHOWERS.
SUN
W WINDS AROUND 5 KT. WAVES 1 FT.
SUN NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
MON
NW WINDS AROUND 5 KT. WAVES 1 FT.
TUE
SW WINDS AROUND 5 KT. WAVES 1 FT.
ANZ537-220800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT. WIDESPREAD SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
SAT NIGHT
S WINDS AROUND 5 KT. WAVES 1 FT. NUMEROUS SHOWERS.
SUN
W WINDS 5 KT. WAVES LESS THAN 1 FT.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
TUE
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ530-220800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS AROUND 5 KT. WAVES 1 FT.
TONIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SCATTERED
SHOWERS.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT. WIDESPREAD SHOWERS.
SAT NIGHT
E WINDS AROUND 5 KT. WAVES 1 FT. SCATTERED SHOWERS.
SUN
W WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ531-220800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
SE WINDS AROUND 5 KT. WAVES FLAT. SCATTERED SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. SCATTERED SHOWERS.
SUN
W WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE...NW WINDS 5 TO 10 KT
BECOMING SW. WAVES 1 FT OR LESS.
ANZ538-220800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
E WINDS 5 KT. WAVES FLAT.
TONIGHT
SE WINDS AROUND 5 KT. WAVES FLAT. NUMEROUS SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SCATTERED
SHOWERS.
SUN
W WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
MON
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
TUE
W WINDS AROUND 5 KT. WAVES FLAT.
ANZ539-220800-
CHESTER RIVER TO QUEENSTOWN MD-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS AROUND 5 KT. WAVES FLAT. SCATTERED SHOWERS.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT. WIDESPREAD SHOWERS.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SCATTERED
SHOWERS.
SUN
W WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ532-220800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS AROUND 5 KT. WAVES 1 FT. NUMEROUS SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT. SCATTERED SHOWERS.
SUN
W WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE...NW WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
ANZ540-220800-
EASTERN BAY-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS AROUND 5 KT. WAVES FLAT. SCATTERED SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SCATTERED
SHOWERS.
SUN
W WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ533-220800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS AROUND 5 KT. WAVES 1 FT. NUMEROUS SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
SAT NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT. SCATTERED SHOWERS.
SUN
W WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE...NW WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
ANZ541-220800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS. NUMEROUS
SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SCATTERED
SHOWERS.
SUN
W WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE...NW WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT OR LESS.
ANZ542-220800-
PATUXENT RIVER TO BROOMES ISLAND MD-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS AROUND 5 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
SAT NIGHT
S WINDS AROUND 5 KT. WAVES 1 FT. SCATTERED SHOWERS.
SUN
W WINDS AROUND 5 KT. WAVES 1 FT.
SUN NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
MON
NW WINDS AROUND 5 KT. WAVES 1 FT.
TUE
SW WINDS AROUND 5 KT. WAVES 1 FT.
ANZ534-220800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT. NUMEROUS SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 2 FT. WIDESPREAD SHOWERS.
SAT NIGHT...SE WINDS 5 TO 10 KT
BECOMING SW AFTER MIDNIGHT. WAVES
1 FT. NUMEROUS SHOWERS.
SUN
W WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING SE. WAVES 1 FT.
ANZ543-220800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
227 PM EDT FRI AUG 21 2026
THIS AFTERNOON
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT. NUMEROUS SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
SAT NIGHT...SE WINDS 5 TO 10 KT
BECOMING SW AFTER MIDNIGHT. WAVES
1 FT. NUMEROUS SHOWERS.
SUN
W WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
TUE...NW WINDS 5 TO 10 KT
BECOMING SE. WAVES 1 FT OR LESS.
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