457
FZUS51 KLWX 201828
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
228 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-
228 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-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES
1 TO 2 FT.
TONIGHT...SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
DIMINISHING
TO 5 KT LATE. WAVES 1 FT. 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
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SHOWERS.
MON
NW WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING.
TUE
SE WINDS AROUND 5 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-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
SW WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO
2 FT.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT. NUMEROUS 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. A
CHANCE OF SHOWERS.
MON
NW WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS IN
THE MORNING.
TUE...NE WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
ANZ537-210800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
NUMEROUS SHOWERS.
SAT...NW WINDS 5 TO 10 KT
BECOMING NE LATE. 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. WAVES 1 TO 2 FT. A CHANCE OF
SHOWERS.
MON
N WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF RAIN THROUGH THE
DAY.
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.
ANZ530-210800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
ISOLATED SHOWERS.
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.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
E 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. SHOWERS LIKELY.
MON
NW WINDS 10 TO 15 KT. WAVES 1 FT. SHOWERS LIKELY IN THE
MORNING, THEN A CHANCE OF RAIN IN THE AFTERNOON.
TUE...NW WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-210800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT.
TONIGHT...SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
DIMINISHING
TO 5 TO 10 KT LATE. WAVES 2 TO 3 FT. NUMEROUS SHOWERS AND SCATTERED
TSTMS.
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. A CHANCE OF SHOWERS.
MON
NW WINDS 15 TO 20 KT. WAVES 2 FT. SHOWERS LIKELY IN THE
MORNING, THEN A CHANCE OF RAIN IN THE AFTERNOON.
TUE...N WINDS 10 TO 15 KT
BECOMING SW. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-210800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT...SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING W
5 KT LATE. WAVES 1 FT. NUMEROUS SHOWERS AND SCATTERED TSTMS.
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. SHOWERS LIKELY.
MON
NW WINDS 10 TO 15 KT. WAVES 1 FT. SHOWERS LIKELY IN THE
MORNING, THEN A CHANCE OF RAIN IN THE AFTERNOON.
TUE...N WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-210800-
CHESTER RIVER TO QUEENSTOWN MD-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING SW
5 TO 10 KT WITH GUSTS TO 20 KT AFTER MIDNIGHT. WAVES 2 FT. NUMEROUS
SHOWERS AND SCATTERED TSTMS.
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 TO 2 FT. A CHANCE OF
SHOWERS.
MON
NW WINDS 10 TO 15 KT. WAVES 2 FT. A CHANCE OF RAIN THROUGH
THE DAY.
TUE...N WINDS 10 TO 15 KT
BECOMING W 5 KT IN THE AFTERNOON, THEN
BECOMING S 10 TO 15 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-210800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
2 TO 3 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING SW
5 TO 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
SE WINDS 5 TO 10 KT. 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. A CHANCE OF SHOWERS.
MON
NW WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF RAIN THROUGH
THE DAY.
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.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-210800-
EASTERN BAY-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING SW
5 TO 10 KT WITH GUSTS TO 20 KT AFTER MIDNIGHT. WAVES 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. A CHANCE OF SHOWERS.
MON
N WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF RAIN
THROUGH THE DAY.
TUE...N WINDS 10 TO 15 KT
BECOMING NW 5 KT IN THE AFTERNOON, THEN
BECOMING S 10 TO 15 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-210800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
2 TO 3 FT.
TONIGHT...S WINDS 15 TO 20 KT
BECOMING SW 5 TO 10 KT LATE. GUSTS
UP TO 25 KT. WAVES 2 TO 3 FT. NUMEROUS SHOWERS AND SCATTERED TSTMS.
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
SE WINDS 5 TO 10 KT. 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. A CHANCE OF SHOWERS.
MON
NW WINDS 15 TO 20 KT. WAVES 3 FT. A CHANCE OF RAIN THROUGH
THE DAY.
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.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-210800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
2 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING SW
5 TO 10 KT LATE. WAVES 2 FT. SHOWERS AND SCATTERED TSTMS.
SAT
NW WINDS 5 TO 10 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...S WINDS 10 TO 15 KT
BECOMING SW 15 TO 20 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
MON
NW WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF RAIN THROUGH
THE DAY.
TUE...N WINDS 10 TO 15 KT
BECOMING NW 5 KT IN THE AFTERNOON, THEN
BECOMING S 10 TO 15 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-210800-
PATUXENT RIVER TO BROOMES ISLAND MD-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT UNTIL EARLY
MORNING. WAVES 1 FT. NUMEROUS SHOWERS AND SCATTERED TSTMS.
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. A
CHANCE OF SHOWERS.
MON
NW WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF RAIN THROUGH
THE DAY.
TUE...N WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-210800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
NUMEROUS SHOWERS.
SAT...NW WINDS 10 TO 15 KT
BECOMING N LATE. GUSTS UP TO 20 KT.
WAVES 1 TO 2 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. 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. A
CHANCE OF SHOWERS.
MON
N WINDS 15 TO 20 KT. WAVES 3 FT. A CHANCE OF RAIN THROUGH THE
DAY.
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.
ANZ543-210800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
228 PM EDT FRI MAR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
S WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT.
TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
NUMEROUS SHOWERS.
SAT...NW WINDS 5 TO 10 KT
BECOMING N LATE. 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. A CHANCE OF SHOWERS.
MON
NW WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF RAIN THROUGH
THE DAY.
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.
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