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Marine Weather Forecast from Environment Canada

Winds


Issued 06:30 PM EDT 27 August 2026

Tonight and Friday. Wind northwest 15 knots diminishing to north 10 near midnight then becoming light early Friday morning. Wind becoming southwest 10 Friday afternoon.

Extended Forecast


Issued 06:30 PM EDT 27 August 2026
Saturday Wind light.
Sunday Wind light.
Monday Wind southeast 15 knots increasing to southeast 20.

Waves


Issued 06:30 PM EDT 27 August 2026

Tonight and Friday. Waves 0.5 to 1 metre subsiding to 0.5 or less late overnight.

Weather & Visibility


Issued 06:30 PM EDT 27 August 2026

Tonight and Friday.Scattered showers this evening.

 

Lake Superior Mafor Forecast and Weather Conditions
From NOAA National Weather Service Weather Forecast Office



  
448   
FZUS63 KMQT 280201  
GLFLS   
  
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
1000 PM EDT THU AUG 27 2026  
  
FOR WATERS BEYOND 5 NAUTICAL MILES OF SHORE ON LAKE SUPERIOR.  
  
WAVES ARE THE SIGNIFICANT WAVE HEIGHT - THE AVERAGE OF THE  
HIGHEST 1/3 OF THE WAVE SPECTRUM. OCCASIONAL WAVE HEIGHT IS THE  
AVERAGE OF THE HIGHEST 1/10 OF THE WAVE SPECTRUM.  
   
SYNOPSIS  
  
A 30.1 INCH HIGH PRESSURE OVER NORTHERN MANITOBA STRETCHES TOWARDS   
LAKE SUPERIOR THROUGH TONIGHT, EVENTUALLY BECOMING CENTERED OVER   
LAKE SUPERIOR AT 30.2 INCHES BY FRIDAY MORNING BEFORE CONTINUING   
INTO NEW ENGLAND ON SATURDAY. SATURDAY NIGHT, A LOW PRESSURE OVER   
THE CENTRAL TO NORTHERN PLAINS DEEPENS TO 29.6 INCHES. THIS LOW   
APPROACHES THE GREAT LAKES OVER THE COURSE OF EARLY NEXT WEEK, WITH   
HEIGHTS OVER LAKE SUPERIOR FALLING TO 29.8 INCHES BY MONDAY   
AFTERNOON.  
  
LSZ162-280800-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
1001 PM EDT THU AUG 27 2026 /901 PM CDT THU AUG 27 2026/  
   
REST OF TONIGHT  
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
FRIDAY  
NORTHEAST WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO  
15 KNOTS IN THE AFTERNOON, THEN VEERING SOUTHEAST LATE. WAVES  
CALM TO 2 FEET.    
FRIDAY NIGHT  
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST LESS  
THAN 10 KNOTS AFTER MIDNIGHT, THEN INCREASING TO 5 TO 15 KNOTS  
LATE. A CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
SATURDAY  
EAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS. WAVES  
CALM TO 2 FEET.    
SATURDAY NIGHT  
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST  
AFTER MIDNIGHT. A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF  
THUNDERSTORMS. WAVES CALM TO 2 FEET.    
SUNDAY  
EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO  
25 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES BUILDING TO  
2 TO 4 FEET.    
SUNDAY NIGHT  
NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF  
SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING TO 1 TO 3 FEET.    
MONDAY  
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM  
TO 2 FEET.    
TUESDAY  
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO  
15 KNOTS. WAVES CALM TO 2 FEET.   
  
  
  
LSZ263-280800-  
LAKE SUPERIOR FROM SAXON HARBOR WI TO UPPER ENTRANCE TO PORTAGE  
CANAL MI 5NM OFF SHORE TO THE US/CANADIAN BORDER INCLUDING ISLE  
ROYALE NATIONAL PARK-  
1001 PM EDT THU AUG 27 2026  
   
REST OF TONIGHT  
NORTHEAST WINDS LESS THAN 10 KNOTS. WAVES CALM  
TO 2 FEET.    
FRIDAY  
EAST WINDS LESS THAN 10 KNOTS BECOMING SOUTH 5 TO  
15 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.    
FRIDAY NIGHT  
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH LATE.  
A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
SATURDAY  
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID  
AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.    
SATURDAY NIGHT  
SOUTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF  
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. WAVES CALM TO  
2 FEET.    
SUNDAY  
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 15 TO  
25 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES BUILDING TO  
1 TO 3 FEET.    
SUNDAY NIGHT  
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND THUNDERSTORMS.  
WAVES SUBSIDING TO CALM TO 2 FEET.    
MONDAY  
EAST WINDS 10 TO 20 KNOTS VEERING SOUTHWEST. WAVES  
BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.    
TUESDAY  
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO  
15 KNOTS. WAVES CALM TO 2 FEET.   
  
  
  
LSZ264-280800-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
1001 PM EDT THU AUG 27 2026  
   
REST OF TONIGHT  
NORTHWEST WINDS LESS THAN 10 KNOTS. WAVES CALM  
TO 2 FEET.    
FRIDAY  
WEST WINDS LESS THAN 10 KNOTS BECOMING SOUTH 5 TO  
15 KNOTS LATE. WAVES CALM TO 2 FEET.    
FRIDAY NIGHT  
SOUTH WINDS 5 TO 15 KNOTS DIMINISHING TO LESS  
THAN 10 KNOTS LATE. WAVES CALM TO 2 FEET.    
SATURDAY  
SOUTHEAST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO  
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS. WAVES CALM  
TO 2 FEET.    
SATURDAY NIGHT  
SOUTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE  
OF SHOWERS. WAVES CALM TO 2 FEET.    
SUNDAY  
EAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS. WAVES  
CALM TO 2 FEET.    
SUNDAY NIGHT  
EAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS.  
WAVES BUILDING TO 1 TO 3 FEET.    
MONDAY  
EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO  
15 KNOTS. A CHANCE OF THUNDERSTORMS. A CHANCE OF SHOWERS. WAVES  
SUBSIDING TO CALM TO 2 FEET.    
TUESDAY  
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. WAVES CALM  
TO 2 FEET.   
  
  
  
LSZ265-280800-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
1001 PM EDT THU AUG 27 2026  
   
REST OF TONIGHT  
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
FRIDAY  
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST IN THE  
AFTERNOON. WAVES CALM TO 2 FEET.    
FRIDAY NIGHT  
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH  
AFTER MIDNIGHT, THEN DIMINISHING TO 5 TO 15 KNOTS LATE. WAVES  
CALM TO 2 FEET.    
SATURDAY  
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO  
20 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO  
2 FEET.    
SATURDAY NIGHT  
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.    
SUNDAY  
SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO  
25 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES BUILDING TO  
1 TO 3 FEET.    
SUNDAY NIGHT  
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.  
WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 1 TO 3 FEET.    
MONDAY  
EAST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO 20 KNOTS.  
A CHANCE OF SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY  
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.   
  
  
  
LSZ266-280800-  
LAKE SUPERIOR EAST OF A LINE FROM MANITOU ISLAND TO MARQUETTE MI  
AND WEST OF A LINE FROM GRAND MARAIS MI TO THE US/CANADIAN BORDER  
BEYOND 5NM FROM SHORE-  
1001 PM EDT THU AUG 27 2026  
   
REST OF TONIGHT  
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO  
5 TO 15 KNOTS AFTER MIDNIGHT, THEN VEERING NORTH LATE. WAVES CALM  
TO 2 FEET.    
FRIDAY  
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST LATE.  
WAVES CALM TO 2 FEET.    
FRIDAY NIGHT  
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
SATURDAY  
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID  
AFTERNOON. A CHANCE OF SHOWERS BY MID AFTERNOON. WAVES CALM TO  
2 FEET.    
SATURDAY NIGHT  
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH  
AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.    
SUNDAY  
SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST BY MID  
AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.    
SUNDAY NIGHT  
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.  
WAVES BUILDING TO 1 TO 3 FEET.    
MONDAY  
EAST WINDS 10 TO 20 KNOTS VEERING SOUTH. A CHANCE OF  
SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY  
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.   
  
  
  
LSZ267-280800-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
1001 PM EDT THU AUG 27 2026  
   
REST OF TONIGHT  
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO  
5 TO 15 KNOTS LATE. WAVES CALM TO 2 FEET.    
FRIDAY  
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST IN THE  
AFTERNOON. WAVES CALM TO 2 FEET.    
FRIDAY NIGHT  
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS LATE. WAVES CALM TO 2 FEET.    
SATURDAY  
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID  
AFTERNOON. A CHANCE OF SHOWERS BY MID AFTERNOON. WAVES CALM TO  
2 FEET.    
SATURDAY NIGHT  
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES CALM TO  
2 FEET.    
SUNDAY  
SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS  
THROUGH EARLY AFTERNOON. SHOWERS LIKELY BY MID AFTERNOON. WAVES  
CALM TO 2 FEET.    
SUNDAY NIGHT  
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.  
WAVES BUILDING TO 1 TO 3 FEET.    
MONDAY  
EAST WINDS 10 TO 20 KNOTS VEERING SOUTH. A CHANCE OF  
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.    
TUESDAY  
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.   
  
  
  
LSZ261-280800-  
MAFOR 2803/  
SUPERIOR WEST 14100 11200 13300. WAVES 1 FOOT OR LESS.   
  
SUPERIOR NORTH CENTRAL 13700 12600 11500 12400. WAVES 1 FOOT OR  
LESS.   
  
SUPERIOR SOUTH CENTRAL 11710 12800 12700 11200 11300 11310. WAVES  
1 FOOT OR LESS.   
  
SUPERIOR EAST 11710 11800 12700 12600 11500 11400. WAVES 2 FEET  
OR LESS.   
  
  
  
WFO MQT  
  
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT  
WEATHER.GOV/MQT/GLFTABLE  
  
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:  
WEATHER.GOV/GREATLAKES  
 




Random Weather Facts

EYE
The roughly circular area of comparatively light winds and fair weather found at the center of a hurricane is usually referred to as the eye of the storm.