580
FZUS51 KLWX 201457
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1057 AM EDT WED MAY 20 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.
ANZ500-202000-
1057 AM EDT WED MAY 20 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
SMALL CRAFT ADVISORIES MAY BE NEEDED THROUGH THURSDAY AS A COLD
FRONT SLOWLY CROSSES THE WATERS. THE FRONT WILL BRING SCATTERED TO
NUMEROUS SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING.
SPECIAL MARINE WARNINGS MAY BE NEEDED FOR STRONGER THUNDERSTORMS
DURING THIS TIME. ADDITIONAL SMALL CRAFT ADVISORIES WILL BE NEEDED
THURSDAY AFTERNOON AND EVENING IN NORTHERLY CHANNELING. INCREASED
ONSHORE FLOW WILL KEEP SMALL CRAFT ADVISORY CONDITIONS GOING ACROSS
THE WATERS AT TIMES FRIDAY INTO THE WEEKEND.
ANZ535-202000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
1057 AM EDT WED MAY 20 2026
REST OF TODAY
SW WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY
WITH A CHANCE OF TSTMS THIS AFTERNOON.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
THU
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
FRI NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SUN
E WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-202000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
1057 AM EDT WED MAY 20 2026
REST OF TODAY
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
WITH A SLIGHT CHANCE OF TSTMS THIS AFTERNOON.
TONIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT EARLY IN THE
EVENING. WAVES 1 FT. A CHANCE OF SHOWERS AND TSTMS.
THU
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
SAT
NE WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS.
SUN
E WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-202000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
1057 AM EDT WED MAY 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO 8 PM
EDT THIS EVENING...
REST OF TODAY...SW WINDS 5 KT
BECOMING S WITH GUSTS TO 20 KT THIS
AFTERNOON. WAVES 1 TO 2 FT. A SLIGHT CHANCE OF SHOWERS THIS
AFTERNOON.
TONIGHT...NE WINDS 5 TO 10 KT WITH GUSTS TO 20 KT
BECOMING N
AFTER MIDNIGHT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
THU NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SHOWERS.
FRI
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO 3 FT.
SHOWERS.
FRI NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT. SHOWERS LIKELY.
SAT
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. SHOWERS LIKELY. A CHANCE
OF TSTMS THROUGH THE NIGHT.
SUN
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-202000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
1057 AM EDT WED MAY 20 2026
REST OF TODAY
SW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY
WITH A CHANCE OF TSTMS THIS AFTERNOON.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
THU
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
THU NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
E WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT. WAVES 1 FT. SHOWERS.
SAT
E WINDS 10 TO 15 KT. WAVES 1 FT. SHOWERS.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY, MAINLY IN THE
MORNING.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-202000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
1057 AM EDT WED MAY 20 2026
REST OF TODAY
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH
A CHANCE OF TSTMS THIS AFTERNOON.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SHOWERS
LIKELY.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SHOWERS.
SAT
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. SHOWERS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-202000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
1057 AM EDT WED MAY 20 2026
REST OF TODAY
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS
LIKELY WITH A CHANCE OF TSTMS THIS AFTERNOON.
TONIGHT...NW WINDS 5 TO 10 KT
BECOMING N LATE. WAVES 1 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
THU
NE WINDS 10 KT. WAVES 1 FT. SHOWERS.
THU NIGHT
NE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
FRI
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS.
FRI NIGHT
E WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SUN
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-202000-
CHESTER RIVER TO QUEENSTOWN MD-
1057 AM EDT WED MAY 20 2026
REST OF TODAY
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF
SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
THU
NE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
LIKELY.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
FRI
E WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS.
FRI NIGHT
E WINDS 10 KT. WAVES 1 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-202000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
1057 AM EDT WED MAY 20 2026
REST OF TODAY
S WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. A CHANCE OF
SHOWERS WITH A SLIGHT CHANCE OF TSTMS THIS AFTERNOON.
TONIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT EARLY IN THE
EVENING. WAVES 1 TO 2 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SHOWERS
LIKELY.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. SHOWERS LIKELY.
FRI
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SHOWERS.
SAT
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. SHOWERS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-202000-
EASTERN BAY-
1057 AM EDT WED MAY 20 2026
REST OF TODAY
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS THIS AFTERNOON.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
LIKELY.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
FRI
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SUN
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-202000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
1057 AM EDT WED MAY 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO 8 PM
EDT THIS EVENING...
REST OF TODAY...S WINDS 5 TO 10 KT
INCREASING TO 15 KT WITH GUSTS
TO 20 KT LATE. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS AND TSTMS THIS
AFTERNOON.
TONIGHT...NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING N IN
THE LATE EVENING AND OVERNIGHT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS
AND TSTMS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO 3 FT.
SHOWERS LIKELY.
THU NIGHT
NE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SHOWERS
LIKELY.
FRI
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. SHOWERS THROUGH THE DAY,
THEN SHOWERS LIKELY THROUGH THE NIGHT.
SUN
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-202000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
1057 AM EDT WED MAY 20 2026
REST OF TODAY
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF
SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT EARLY IN THE
EVENING. WAVES 1 FT. A CHANCE OF SHOWERS AND TSTMS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SHOWERS
LIKELY.
THU NIGHT
NE WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS LIKELY.
FRI
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS THROUGH THE DAY, THEN
SHOWERS LIKELY THROUGH THE NIGHT.
SUN
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-202000-
PATUXENT RIVER TO BROOMES ISLAND MD-
1057 AM EDT WED MAY 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO 8 PM
EDT THIS EVENING...
REST OF TODAY...SW WINDS 5 TO 10 KT
BECOMING SE LATE. WAVES 1 FT.
A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF TSTMS THIS AFTERNOON.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A CHANCE
OF SHOWERS.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
FRI
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS THROUGH THE DAY,
THEN SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE NIGHT.
SUN
E WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-202000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
1057 AM EDT WED MAY 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO 8 PM
EDT THIS EVENING...
REST OF TODAY
S WINDS 10 TO 15 KT. GUSTS UP TO 25 KT. WAVES 1 TO
2 FT...BUILDING TO 3 FT LATE.
TONIGHT...SE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
BECOMING NE
WITH GUSTS TO 20 KT LATE IN THE EVENING, THEN BECOMING N 5 TO 10 KT
AFTER MIDNIGHT. WAVES 3 FT...SUBSIDING TO 1 FT AFTER MIDNIGHT. A
CHANCE OF SHOWERS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
THU NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
FRI
NE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 3 FT. SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT. SHOWERS.
SAT
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. SHOWERS THROUGH THE
DAY, THEN SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE NIGHT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-202000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
1057 AM EDT WED MAY 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO 8 PM
EDT THIS EVENING...
REST OF TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING E
WITH GUSTS TO 20 KT LATE IN THE EVENING, THEN BECOMING N 5 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SHOWERS.
THU NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS LIKELY.
FRI
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SHOWERS.
FRI NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS.
SAT
E WINDS 10 TO 15 KT. WAVES 1 FT. SHOWERS THROUGH THE DAY,
THEN SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE NIGHT.
SUN
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page