146
FZUS51 KLWX 272057
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
457 PM EDT THU AUG 27 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.
ANZ500-280800-
457 PM EDT THU AUG 27 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A COLD FRONT WILL APPROACH FROM THE NORTHWEST THIS AFTERNOON AND
EVENTUALLY PASS TO THE SOUTHEAST BY EARLY SATURDAY. HIGH PRESSURE
WILL BUILD NORTH OF THE AREA THIS WEEKEND. THERE IS THE POTENTIAL
FOR SOME GUSTY THUNDERSTORMS IN THE AFTERNOON AND EVENING TODAY, AND
AGAIN ON FRIDAY, WHICH MAY NECESSITATE SPECIAL MARINE WARNINGS.
ANZ535-280800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
457 PM EDT THU AUG 27 2026
...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT. SCATTERED
SHOWERS AND TSTMS.
TONIGHT...S WINDS 5 TO 10 KT UNTIL EARLY MORNING
BECOMING LIGHT.
WAVES 1 FT. NUMEROUS SHOWERS AND SCATTERED TSTMS. PATCHY FOG. VSBY
1 NM OR LESS.
FRI
NW WINDS AROUND 5 KT. WAVES 1 FT. PATCHY FOG. VSBY 1 TO 3 NM.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT.
SAT
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT.
MON
SW WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-280800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
457 PM EDT THU AUG 27 2026
...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT. SCATTERED
SHOWERS AND TSTMS.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. SCATTERED SHOWERS AND
TSTMS. PATCHY FOG. VSBY 1 NM OR LESS.
FRI
NW WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS. PATCHY FOG. VSBY 1 TO 3 NM.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
SAT
NE WINDS AROUND 5 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT.
MON
SW WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-280800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
457 PM EDT THU AUG 27 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
REST OF THIS AFTERNOON
SE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT. ISOLATED SHOWERS AND TSTMS.
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT.
FRI
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
AND TSTMS.
FRI NIGHT
NE WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS
AND TSTMS.
SAT
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
MON
SW WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-280800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
457 PM EDT THU AUG 27 2026
...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
REST OF THIS AFTERNOON
S WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT. SCATTERED SHOWERS AND TSTMS.
TONIGHT
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT. SCATTERED SHOWERS AND TSTMS.
FRI
N WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES FLAT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
MON
SW WINDS 5 KT. WAVES FLAT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-280800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
457 PM EDT THU AUG 27 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
REST OF THIS AFTERNOON
S WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
2 FT. SCATTERED SHOWERS AND TSTMS.
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING SW
AROUND 5 KT LATE. WAVES 1 TO 2 FT. SCATTERED SHOWERS AND TSTMS.
FRI
N WINDS 5 KT. WAVES FLAT.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT
NE 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 OR LESS.
MON
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-280800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
457 PM EDT THU AUG 27 2026
...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
REST OF THIS AFTERNOON
SE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT. SCATTERED SHOWERS AND TSTMS.
TONIGHT...S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT
BECOMING W
LATE. WAVES 1 FT OR LESS. NUMEROUS SHOWERS AND SCATTERED TSTMS.
FRI
N WINDS AROUND 5 KT. WAVES FLAT. PATCHY FOG. VSBY 1 TO 3 NM.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES FLAT.
SAT
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES FLAT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
MON
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-280800-
CHESTER RIVER TO QUEENSTOWN MD-
457 PM EDT THU AUG 27 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT. SCATTERED
SHOWERS AND TSTMS.
TONIGHT
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT. SCATTERED SHOWERS AND TSTMS.
FRI
NW WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
SAT
NE 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 OR LESS.
MON
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-280800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
457 PM EDT THU AUG 27 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
REST OF THIS AFTERNOON
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
3 FT. ISOLATED SHOWERS AND TSTMS.
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING SW
5 KT LATE. WAVES 3 FT...SUBSIDING TO 1 FT AFTER MIDNIGHT. SCATTERED
SHOWERS AND TSTMS.
FRI
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
SAT
NE 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 OR LESS
BUILDING TO 2 FT.
MON
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-280800-
EASTERN BAY-
457 PM EDT THU AUG 27 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
REST OF THIS AFTERNOON
S WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT. ISOLATED SHOWERS AND TSTMS.
TONIGHT
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT. SCATTERED SHOWERS AND TSTMS.
FRI
NW WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 KT. WAVES FLAT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
MON
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-280800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
457 PM EDT THU AUG 27 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
REST OF THIS AFTERNOON
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT. ISOLATED SHOWERS AND TSTMS.
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 3 FT... SUBSIDING TO 1 FT AFTER
MIDNIGHT. SCATTERED SHOWERS AND TSTMS.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
SAT
NE 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 OR LESS
BUILDING TO 1 TO
2 FT.
MON
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-280800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
457 PM EDT THU AUG 27 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
REST OF THIS AFTERNOON
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT. ISOLATED SHOWERS AND TSTMS.
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
DIMINISHING TO
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT. SCATTERED SHOWERS AND
TSTMS.
FRI
NW WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
SAT
NE 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 OR LESS.
MON
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-280800-
PATUXENT RIVER TO BROOMES ISLAND MD-
457 PM EDT THU AUG 27 2026
...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
REST OF THIS AFTERNOON
SE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT...S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT
BECOMING SW
AFTER MIDNIGHT. WAVES 1 FT. SCATTERED SHOWERS AND TSTMS.
FRI
N WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
SAT
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT NIGHT
SE WINDS AROUND 5 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
MON
SW WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-280800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
457 PM EDT THU AUG 27 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
REST OF THIS AFTERNOON
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 2 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT...SE WINDS 5 KT
BECOMING N AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS AND TSTMS.
SAT
NE 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 OR LESS
BUILDING TO 2 FT.
MON
S WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-280800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
457 PM EDT THU AUG 27 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
REST OF THIS AFTERNOON
S WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT.
FRI
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
SAT
NE 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 OR LESS.
MON
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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