657
FZUS51 KLWX 202107
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
507 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.
ANZ500-210900-
507 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.
ANZ535-210900-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
507 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 25 KT
DIMINISHING
TO 5 KT LATE. WAVES 1 FT. SCATTERED TSTMS. SHOWERS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 KT. WAVES LESS THAN 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 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
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.
ANZ536-210900-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
507 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT. NUMEROUS SHOWERS. SCATTERED TSTMS, MAINLY
THIS EVENING.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 KT. WAVES LESS THAN 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. WAVES 2 FT.
MON NIGHT
N WINDS 15 TO 20 KT. 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.
ANZ537-210900-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
507 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 25 KT. WAVES 2 FT.
SCATTERED SHOWERS WITH ISOLATED TSTMS THIS EVENING, THEN NUMEROUS
SHOWERS WITH ISOLATED TSTMS AFTER MIDNIGHT.
SAT...NW WINDS 5 TO 10 KT
BECOMING NE LATE. WAVES 1 FT.
SAT NIGHT...SE WINDS 5 TO 10 KT
BECOMING 5 KT LATE. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. SCATTERED
SHOWERS.
MON
NW WINDS 15 TO 20 KT. WAVES 2 FT. SCATTERED SHOWERS.
MON NIGHT
N WINDS 15 TO 20 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.
ANZ530-210900-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
507 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 25 KT
BECOMING W
5 KT LATE. WAVES 1 TO 2 FT. SHOWERS AND SCATTERED TSTMS THIS
EVENING, THEN SCATTERED SHOWERS AND TSTMS AFTER MIDNIGHT.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT. WAVES 1 FT. NUMEROUS SHOWERS.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SCATTERED SHOWERS.
MON NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. 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.
ANZ531-210900-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
507 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT UNTIL EARLY
MORNING. WAVES 2 TO 3 FT...SUBSIDING TO 1 FT LATE. SCATTERED TSTMS.
NUMEROUS SHOWERS, MAINLY THIS EVENING.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT. WAVES 1 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT. WAVES 2 FT. SCATTERED SHOWERS.
MON NIGHT
NW WINDS 15 TO 20 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.
ANZ538-210900-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
507 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. SCATTERED TSTMS. NUMEROUS SHOWERS, MAINLY THIS
EVENING.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES FLAT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. NUMEROUS SHOWERS.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SCATTERED SHOWERS.
MON NIGHT
NW 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 OR LESS.
WED
W WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-210900-
CHESTER RIVER TO QUEENSTOWN MD-
507 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT. SCATTERED TSTMS. NUMEROUS SHOWERS, MAINLY
THIS EVENING.
SAT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT. WAVES 1 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SCATTERED
SHOWERS.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. 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.
ANZ532-210900-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
507 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
BECOMING SW
10 KT LATE. WAVES 2 TO 3 FT. NUMEROUS SHOWERS AND SCATTERED TSTMS.
SAT...N WINDS 5 TO 10 KT
BECOMING NE LATE. WAVES 1 FT.
SAT NIGHT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES
1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SUN NIGHT...S WINDS 10 TO 15 KT
BECOMING W 15 TO 20 KT AFTER
MIDNIGHT. WAVES 2 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT. WAVES 2 FT. SCATTERED SHOWERS.
MON NIGHT
N WINDS 15 TO 20 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.
ANZ540-210900-
EASTERN BAY-
507 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT. NUMEROUS SHOWERS AND SCATTERED TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT...S WINDS 10 TO 15 KT
BECOMING W AFTER MIDNIGHT. WAVES
1 TO 2 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT. WAVES 2 FT. SCATTERED SHOWERS.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 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.
ANZ533-210900-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
507 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT...S WINDS 15 TO 20 KT
BECOMING SW 10 KT LATE. GUSTS UP TO
25 KT. WAVES 2 TO 3 FT. SCATTERED SHOWERS AND TSTMS THIS EVENING,
THEN NUMEROUS SHOWERS AND SCATTERED TSTMS AFTER MIDNIGHT.
SAT...NW WINDS 10 TO 15 KT
BECOMING N 5 TO 10 KT 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 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT...S WINDS 10 TO 15 KT
BECOMING SW 15 TO 20 KT AFTER
MIDNIGHT. WAVES 2 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 15 TO 20 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.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-210900-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
507 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
BECOMING SW
10 KT LATE. WAVES 2 FT. SCATTERED SHOWERS AND TSTMS THIS EVENING,
THEN SHOWERS AND SCATTERED TSTMS AFTER MIDNIGHT.
SAT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT...E WINDS 5 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT...S WINDS 10 TO 15 KT
BECOMING SW 15 TO 20 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SCATTERED SHOWERS.
MON NIGHT
N WINDS 15 TO 20 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.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-210900-
PATUXENT RIVER TO BROOMES ISLAND MD-
507 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT SATURDAY
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT UNTIL EARLY
MORNING. WAVES 1 FT. SCATTERED TSTMS. SCATTERED SHOWERS THIS
EVENING, THEN NUMEROUS SHOWERS AFTER MIDNIGHT.
SAT...NW WINDS 5 TO 10 KT
BECOMING NE LATE. WAVES 1 FT.
SAT NIGHT
SE WINDS AROUND 5 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 10 TO 15 KT WITH GUSTS TO 20 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.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-210900-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
507 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.
SCATTERED SHOWERS THIS EVENING, THEN NUMEROUS SHOWERS WITH ISOLATED
TSTMS AFTER MIDNIGHT.
SAT...NW WINDS 10 TO 15 KT
BECOMING N LATE. GUSTS UP TO 20 KT.
WAVES 2 FT.
SAT NIGHT...NE WINDS 5 TO 10 KT
BECOMING SE IN THE LATE EVENING
AND OVERNIGHT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 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. 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.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-210900-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
507 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.
NUMEROUS SHOWERS THIS EVENING, THEN NUMEROUS SHOWERS WITH ISOLATED
TSTMS AFTER MIDNIGHT.
SAT...NW WINDS 5 TO 10 KT
BECOMING N LATE. 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 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SCATTERED SHOWERS.
MON
NW WINDS 15 TO 20 KT. WAVES 2 FT. SCATTERED SHOWERS.
MON NIGHT
N WINDS 15 TO 20 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.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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