237
FZUS51 KLWX 211827
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
227 PM EDT THU MAY 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 THU MAY 21 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A COLD FRONT WILL CONTINUE TO MOVE SOUTH OF THE WATERS THIS
AFTERNOON AND REMAIN SOUTH OF THE WATERS FRIDAY AND SATURDAY BEFORE
LIFTING BACK TO THE NORTH SUNDAY INTO EARLY NEXT WEEK. SMALL CRAFT
ADVISORIES WILL BE NEEDED THROUGH SATURDAY.
ANZ535-220800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING
THIS AFTERNOON
NE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
NUMEROUS SHOWERS.
TONIGHT
NE WINDS 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
FRI
NE WINDS 10 KT. WAVES 1 FT. RAIN.
FRI NIGHT
NE WINDS 10 KT. WAVES 1 FT. RAIN.
SAT
E WINDS 10 KT. WAVES 1 FT. RAIN.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SUN
E WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS, MAINLY IN THE
MORNING.
MON
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
IN THE MORNING, THEN SHOWERS LIKELY.
ANZ536-220800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING
THIS AFTERNOON
NE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SCATTERED SHOWERS.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WIDESPREAD SHOWERS.
FRI
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. RAIN.
FRI NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
RAIN.
SAT
E WINDS 10 KT. WAVES 1 FT. RAIN.
SAT NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SUN
E WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS, MAINLY IN THE
MORNING.
MON
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
IN THE MORNING, THEN A CHANCE OF TSTMS THROUGH THE NIGHT. SHOWERS
LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-220800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES
2 TO 3 FT. ISOLATED SHOWERS.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
WIDESPREAD SHOWERS.
FRI
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. RAIN.
FRI NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
RAIN.
SAT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 3 FT. RAIN.
SAT NIGHT...E WINDS 10 TO 15 KT
BECOMING S 5 TO 10 KT AFTER
MIDNIGHT. GUSTS UP TO 20 KT. WAVES 2 FT. SHOWERS.
SUN
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SHOWERS, MAINLY IN
THE MORNING.
MON
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
IN THE MORNING, THEN A CHANCE OF TSTMS THROUGH THE NIGHT. SHOWERS
LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-220800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY MORNING THROUGH LATE
FRIDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT. WIDESPREAD SHOWERS.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
NUMEROUS SHOWERS.
FRI
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
RAIN LIKELY.
FRI NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. RAIN.
SAT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
RAIN.
SAT NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS IN THE
MORNING. A CHANCE OF SHOWERS.
MON
SW WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
ANZ531-220800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
THIS AFTERNOON
NE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
NUMEROUS SHOWERS.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WIDESPREAD SHOWERS.
FRI
E WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT. RAIN LIKELY.
FRI NIGHT
E WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT. RAIN.
SAT
E WINDS 15 TO 20 KT. WAVES 2 FT. RAIN.
SAT NIGHT
E WINDS 15 TO 20 KT. WAVES 2 FT. SHOWERS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS.
MON
S WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
ANZ538-220800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING
...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY MORNING THROUGH LATE
FRIDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT. NUMEROUS SHOWERS.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WIDESPREAD SHOWERS.
FRI
E WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. RAIN LIKELY.
FRI NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. RAIN.
SAT
E WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. RAIN.
SAT NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS.
SUN
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SHOWERS IN THE
MORNING. A CHANCE OF SHOWERS.
MON
S WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
ANZ539-220800-
CHESTER RIVER TO QUEENSTOWN MD-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
THIS AFTERNOON
NE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SCATTERED SHOWERS.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. WIDESPREAD SHOWERS.
FRI
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. RAIN
LIKELY.
FRI NIGHT
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
RAIN.
SAT
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. RAIN.
SAT NIGHT
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 TO
2 FT. SHOWERS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS IN THE
MORNING. A CHANCE OF SHOWERS.
MON
S WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS IN THE
MORNING. SHOWERS LIKELY.
ANZ532-220800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
THIS AFTERNOON
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT. SCATTERED SHOWERS.
TONIGHT
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
WIDESPREAD SHOWERS.
FRI
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. RAIN.
FRI NIGHT
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT. RAIN.
SAT
E WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 3 FT. RAIN.
SAT NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SHOWERS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS IN THE
MORNING. A CHANCE OF SHOWERS.
MON
SE WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS IN THE
MORNING. SHOWERS LIKELY.
ANZ540-220800-
EASTERN BAY-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
THIS AFTERNOON
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SCATTERED SHOWERS.
TONIGHT
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
WIDESPREAD SHOWERS.
FRI
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. RAIN
LIKELY.
FRI NIGHT
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
RAIN.
SAT
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. RAIN.
SAT NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO
2 FT. SHOWERS.
SUN
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SHOWERS, MAINLY IN
THE MORNING.
MON
SE WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS IN THE
MORNING. SHOWERS LIKELY.
ANZ533-220800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
THIS AFTERNOON
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SCATTERED SHOWERS.
TONIGHT
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
WIDESPREAD SHOWERS.
FRI
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. RAIN.
FRI NIGHT
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
RAIN.
SAT
E WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 3 FT. RAIN.
SAT NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SHOWERS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS THROUGH THE
DAY, THEN A CHANCE OF SHOWERS THROUGH THE NIGHT.
MON
SE WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS IN THE
MORNING. SHOWERS LIKELY.
ANZ541-220800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
THIS AFTERNOON
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SCATTERED SHOWERS.
TONIGHT
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
WIDESPREAD SHOWERS.
FRI
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. RAIN.
FRI NIGHT
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
RAIN.
SAT
E WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. RAIN.
SAT NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS THROUGH THE
DAY, THEN A CHANCE OF SHOWERS THROUGH THE NIGHT.
MON
SE WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS IN THE
MORNING. SHOWERS LIKELY.
ANZ542-220800-
PATUXENT RIVER TO BROOMES ISLAND MD-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT. ISOLATED SHOWERS.
TONIGHT
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
WIDESPREAD SHOWERS.
FRI
NE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. RAIN.
FRI NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
RAIN.
SAT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. RAIN.
SAT NIGHT...E WINDS 10 TO 15 KT
BECOMING SE 5 TO 10 KT AFTER
MIDNIGHT. WAVES 1 FT. SHOWERS.
SUN
NE WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS THROUGH THE DAY,
THEN A CHANCE OF SHOWERS THROUGH THE NIGHT.
MON
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
IN THE MORNING, THEN SHOWERS LIKELY.
ANZ534-220800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES
2 TO 3 FT. ISOLATED SHOWERS.
TONIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
WIDESPREAD SHOWERS.
FRI
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. RAIN.
FRI NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
RAIN.
SAT
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. RAIN.
SAT NIGHT...E WINDS 10 TO 15 KT
BECOMING S AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 2 TO 3 FT. SHOWERS.
SUN...NW WINDS 5 TO 10 KT
BECOMING E. WAVES 1 FT.
MON
SE WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY.
ANZ543-220800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
227 PM EDT THU MAY 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE FRIDAY NIGHT
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES
1 TO 2 FT. ISOLATED SHOWERS.
TONIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SCATTERED SHOWERS.
FRI
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. RAIN.
FRI NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
RAIN.
SAT
E WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. RAIN.
SAT NIGHT...E WINDS 10 TO 15 KT
BECOMING SE AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 1 FT. SHOWERS.
SUN...SW WINDS 5 TO 10 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
MON
SE WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY.
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