937  
FZUS53 KGRB 121337  
NSHGRB  
 
NEARSHORE MARINE FORECAST  
NATIONAL WEATHER SERVICE GREEN BAY WI  
837 AM CDT SUN APR 12 2026  
 
FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN  
 
LMZ521-522-121600-  
GREEN BAY SOUTH OF LINE FROM CEDAR RIVER TO ROCK ISLAND PASSAGE  
AND NORTH OF A LINE FROM OCONTO WI TO LITTLE STURGEON BAY WI-  
GREEN BAY SOUTH OF LINE FROM OCONTO WI TO LITTLE STURGEON BAY WI-  
837 AM CDT SUN APR 12 2026  
 
...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM CDT THIS AFTERNOON  
THROUGH LATE TONIGHT...  
   
TODAY
 
S WIND 15 TO 25 KTS. WAVES 1 TO 3 FT BUILDING TO 2 TO  
4 FT IN THE AFTERNOON. PATCHY FOG. SHOWERS LIKELY IN THE MORNING.  
A CHANCE OF THUNDERSTORMS. A CHANCE OF SHOWERS IN THE AFTERNOON.    
TONIGHT
 
SW WIND TO 30 KTS DECREASING TO 10 TO 20 KTS AFTER  
MIDNIGHT. WAVES 3 TO 5 FT. A SLIGHT CHANCE OF SHOWERS IN THE  
EVENING. PATCHY FOG.    
MONDAY
 
W WIND 5 TO 10 KTS VEERING NE MID-DAY, THEN VEERING E  
EARLY IN THE AFTERNOON. WAVES 1 TO 3 FT. PATCHY FOG IN THE  
MORNING. .    
MONDAY NIGHT
 
SE WIND 10 TO 15 KTS BACKING N AFTER MIDNIGHT.  
WAVES 2 FT OR LESS. RAIN SHOWERS AND A CHANCE OF THUNDERSTORMS.  
 

 
 
LMZ541-121600-  
ROCK ISLAND PASSAGE TO STURGEON BAY WI-  
837 AM CDT SUN APR 12 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING
 
 
   
TODAY
 
S WIND 15 TO 25 KTS. WAVES 5 TO 8 FT BUILDING TO 6 TO  
10 FT IN THE AFTERNOON. PATCHY FOG IN THE MORNING. AREAS OF DENSE  
FOG IN THE AFTERNOON. SHOWERS LIKELY IN THE MORNING. A CHANCE OF  
THUNDERSTORMS. A CHANCE OF SHOWERS IN THE AFTERNOON.    
TONIGHT
 
SW WIND TO 30 KTS DECREASING TO 10 TO 20 KTS AFTER  
MIDNIGHT. WAVES 6 TO 10 FT. A SLIGHT CHANCE OF SHOWERS IN THE  
EVENING. AREAS OF FOG IN THE EVENING, THEN PATCHY FOG AFTER  
MIDNIGHT.    
MONDAY
 
W WIND 10 TO 15 KTS VEERING NE 5 TO 10 KTS MID-DAY,  
THEN VEERING E EARLY IN THE AFTERNOON. WAVES 4 TO 7 FT SUBSIDING  
TO 2 TO 4 FT IN THE AFTERNOON. PATCHY FOG IN THE MORNING.    
MONDAY NIGHT
 
SE WIND 10 TO 15 KTS BACKING NW AFTER MIDNIGHT.  
WAVES 1 TO 3 FT BUILDING TO 2 TO 4 FT AFTER MIDNIGHT. RAIN  
SHOWERS AND A CHANCE OF THUNDERSTORMS.  
 

 
 
LMZ542-543-121600-  
STURGEON BAY TO TWO RIVERS WI-TWO RIVERS TO SHEBOYGAN WI-  
837 AM CDT SUN APR 12 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING
 
 
   
TODAY
 
S WIND 15 TO 25 KTS. WAVES 5 TO 8 FT. PATCHY FOG. A  
CHANCE OF SHOWERS AND THUNDERSTORMS.    
TONIGHT
 
SW WIND TO 30 KTS. WAVES 6 TO 10 FT SUBSIDING TO 4 TO  
7 FT AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS  
IN THE EVENING. PATCHY FOG.    
MONDAY
 
W WIND 10 TO 15 KTS BACKING SE EARLY IN THE AFTERNOON.  
WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT IN THE AFTERNOON. PATCHY  
FOG IN THE MORNING. A CHANCE OF SHOWERS IN THE AFTERNOON.    
MONDAY NIGHT
 
SE WIND 10 TO 15 KTS VEERING SW AFTER MIDNIGHT.  
WAVES 3 TO 5 FT. RAIN SHOWERS AND A CHANCE OF THUNDERSTORMS.  
 

 
 
SEE LAKE MICHIGAN OPEN LAKE FORECAST FOR TUESDAY THROUGH THURSDAY.  
 
WAVE HEIGHT FORECAST IS FOR ICE FREE AREAS.  
 
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