305
FZUS51 KLWX 202321
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
721 PM EDT FRI MAR 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.
ANZ500-210800-
721 PM EDT FRI MAR 20 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A QUICK MOVING CLIPPER SYSTEM WILL MOVE ACROSS THE AREA TONIGHT.
HIGH PRESSURE WILL BUILD IN SATURDAY. ANOTHER COLD FRONT WILL PUSH
THROUGH SUNDAY NIGHT BEFORE HIGH PRESSURE APPROACHES FROM THE WEST
EARLY NEXT WEEK. SMALL CRAFT ADVISORIES MAY BE NEEDED SATURDAY
MORNING, AND AGAIN SUNDAY AFTERNOON THROUGH MONDAY NIGHT.
ANZ535-210800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT. NUMEROUS SHOWERS WITH ISOLATED TSTMS THIS
EVENING, THEN SCATTERED SHOWERS AFTER MIDNIGHT.
SAT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL LATE AFTERNOON.
WAVES 1 FT.
SAT NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
SUN
S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 1 FT.
SCATTERED SHOWERS.
MON NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 1 FT.
TUE
SE WINDS AROUND 5 KT. WAVES 1 FT.
WED
W WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-210800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
NUMEROUS SHOWERS WITH ISOLATED TSTMS THIS EVENING, THEN SCATTERED
SHOWERS AFTER MIDNIGHT.
SAT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL LATE AFTERNOON.
WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
WED
W WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-210800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
ISOLATED TSTMS. NUMEROUS SHOWERS, MAINLY THIS EVENING.
SAT...NW WINDS 5 TO 10 KT
BECOMING NE LATE. GUSTS UP TO 20 KT.
WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TUE...N WINDS 10 TO 15 KT
BECOMING NE 5 KT IN THE AFTERNOON, THEN
BECOMING S 10 TO 15 KT. WAVES 1 TO 2 FT.
WED...SW WINDS 10 TO 15 KT
BECOMING NW. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-210800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS WITH ISOLATED TSTMS, MAINLY THIS EVENING.
SAT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL LATE AFTERNOON.
WAVES 1 FT.
SAT NIGHT...NE WINDS 5 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
NUMEROUS SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 1 FT.
SCATTERED SHOWERS.
MON NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 1 FT.
TUE...NW WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
WED...W WINDS 10 TO 15 KT
BECOMING NW 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-210800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT...SUBSIDING TO 1 FT LATE. SHOWERS WITH ISOLATED TSTMS THIS
EVENING, THEN SCATTERED SHOWERS AFTER MIDNIGHT.
SAT...NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING N 5 TO
10 KT IN THE AFTERNOON. WAVES 1 FT.
SAT NIGHT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES
1 FT OR LESS.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT...S WINDS 10 TO 15 KT
BECOMING W AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 1 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SCATTERED SHOWERS.
MON NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TUE...N WINDS 10 TO 15 KT
BECOMING SW. WAVES 1 TO 2 FT.
WED...W WINDS 10 TO 15 KT
BECOMING NW. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-210800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT...SW WINDS 10 TO 15 KT
BECOMING W 5 KT LATE. GUSTS UP TO
20 KT. WAVES 1 FT. NUMEROUS SHOWERS WITH ISOLATED TSTMS THIS
EVENING, THEN SCATTERED SHOWERS AFTER MIDNIGHT.
SAT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL LATE AFTERNOON.
WAVES 1 FT.
SAT NIGHT...E WINDS 5 TO 10 KT
BECOMING S LATE. WAVES FLAT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 KT. WAVES 1 FT. NUMEROUS SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 1 FT.
SCATTERED SHOWERS.
MON NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 1 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT OR LESS.
WED
W WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-210800-
CHESTER RIVER TO QUEENSTOWN MD-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS WITH ISOLATED TSTMS THIS EVENING, THEN SCATTERED
SHOWERS AFTER MIDNIGHT.
SAT
NW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL LATE AFTERNOON.
WAVES 1 FT.
SAT NIGHT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES
1 FT OR LESS.
SUN
S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 FT.
SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 2 FT.
TUE...N WINDS 10 TO 15 KT
BECOMING W 5 KT IN THE AFTERNOON, THEN
BECOMING S 10 TO 15 KT. WAVES 1 FT.
WED...W WINDS 10 TO 15 KT
BECOMING NW. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-210800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT. SHOWERS WITH ISOLATED TSTMS THIS EVENING, THEN SCATTERED
SHOWERS AFTER MIDNIGHT.
SAT...NW WINDS 10 TO 15 KT
BECOMING N 5 TO 10 KT IN THE
AFTERNOON. GUSTS UP TO 20 KT. WAVES 1 FT.
SAT NIGHT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES
1 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SUN NIGHT...S WINDS 10 TO 15 KT
BECOMING SW AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 2 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TUE...N WINDS 10 TO 15 KT
BECOMING NE 5 KT IN THE AFTERNOON, THEN
BECOMING S 10 TO 15 KT. WAVES 1 TO 2 FT.
WED...W WINDS 15 TO 20 KT
BECOMING NW 10 TO 15 KT. WAVES 1 TO
2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-210800-
EASTERN BAY-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS WITH ISOLATED TSTMS THIS EVENING, THEN SCATTERED
SHOWERS AFTER MIDNIGHT.
SAT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL LATE AFTERNOON.
WAVES 1 FT.
SAT NIGHT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES
1 FT OR LESS.
SUN
S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TUE...N WINDS 10 TO 15 KT
BECOMING NW 5 KT IN THE AFTERNOON, THEN
BECOMING S 10 TO 15 KT. WAVES 1 TO 2 FT.
WED...W WINDS 10 TO 15 KT
BECOMING NW. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-210800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT. NUMEROUS SHOWERS, MAINLY THIS EVENING.
SAT...NW WINDS 10 TO 15 KT
BECOMING N IN THE AFTERNOON. GUSTS UP
TO 20 KT. WAVES 2 FT.
SAT NIGHT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES
1 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
TUE...N WINDS 10 TO 15 KT
BECOMING NE 5 KT IN THE AFTERNOON, THEN
BECOMING S 10 TO 15 KT. WAVES 1 TO 2 FT.
WED...SW WINDS 15 TO 20 KT
BECOMING NW 10 TO 15 KT. WAVES 2 FT.
ANZ541-210800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
NUMEROUS SHOWERS, MAINLY THIS EVENING.
SAT...NW WINDS 10 TO 15 KT
BECOMING N IN THE AFTERNOON. GUSTS UP
TO 20 KT. WAVES 1 FT.
SAT NIGHT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES
1 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TUE...N WINDS 10 TO 15 KT
BECOMING NW 5 KT IN THE AFTERNOON, THEN
BECOMING S 10 TO 15 KT. WAVES 1 TO 2 FT.
WED...SW WINDS 15 TO 20 KT
BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. WAVES 2 FT.
ANZ542-210800-
PATUXENT RIVER TO BROOMES ISLAND MD-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
NUMEROUS SHOWERS, MAINLY THIS EVENING.
SAT...W WINDS 5 KT
BECOMING N 10 TO 15 KT IN THE LATE MORNING AND
AFTERNOON. GUSTS UP TO 20 KT. WAVES 1 FT.
SAT NIGHT...E WINDS 5 TO 10 KT
BECOMING SE AFTER MIDNIGHT. WAVES
1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
WED
NW WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ534-210800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
NUMEROUS SHOWERS, MAINLY THIS EVENING.
SAT...NW WINDS 10 TO 15 KT
BECOMING N IN THE AFTERNOON. GUSTS UP
TO 20 KT. WAVES 2 FT.
SAT NIGHT...NE WINDS 5 TO 10 KT
BECOMING SE 10 TO 15 KT IN THE
LATE EVENING AND OVERNIGHT. GUSTS UP TO 20 KT. WAVES 1 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
TUE...N WINDS 15 TO 20 KT
DIMINISHING TO 5 TO 10 KT IN THE
AFTERNOON, THEN BECOMING S 10 TO 15 KT. WAVES 3 FT... SUBSIDING TO
1 TO 2 FT.
WED...SW WINDS 15 TO 20 KT
BECOMING NW. WAVES 2 TO 3 FT.
ANZ543-210800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
721 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
SHOWERS, MAINLY THIS EVENING.
SAT...NW WINDS 5 TO 10 KT
BECOMING N LATE. GUSTS UP TO 20 KT.
WAVES 1 FT.
SAT NIGHT...E WINDS 5 TO 10 KT
BECOMING SE AFTER MIDNIGHT. WAVES
1 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TUE...N WINDS 15 TO 20 KT
BECOMING NW 5 TO 10 KT IN THE
AFTERNOON, THEN BECOMING S 10 TO 15 KT. WAVES 1 TO 2 FT.
WED...SW WINDS 10 TO 15 KT
BECOMING NW 15 TO 20 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT.
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