Marine Weather Forecast from Environment Canada

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

  
024   
FZUS63 KMQT 110901  
GLFLS   
  
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
401 AM EST TUE NOV 11 2025  
  
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 29.3 INCH LOW MOVES FROM NORTHERN MANITOBA TO HUDSON BAY TODAY AND   
TONIGHT, SENDING A 29.4 INCH TROUGH ACROSS THE LAKE THIS AFTERNOON   
AND EVENING. BY WEDNESDAY NIGHT, THE LAKE WILL BE BETWEEN 30.1 INCH   
RIDGING OVER THE MIDWEST AND A DEEP 28.4 INCH LOW OVER LABRADOR.   
RIDGING BUILDS TO 30.0 INCHES OVER THE LAKE THURSDAY NIGHT AHEAD OF   
A 29.4 INCH TROUGH MOVING OUT OF THE NORTHERN ROCKIES. THIS TROUGH   
WILL MOVE THROUGH LAKE SUPERIOR LATE SATURDAY INTO SUNDAY.  
  
LSZ162-112100-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
401 AM EST TUE NOV 11 2025 /301 AM CST TUE NOV 11 2025/  
   
EARLY THIS MORNING  
SOUTH WINDS 20 TO 30 KNOTS. A SLIGHT CHANCE  
OF SNOW SHOWERS. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET  
OCCASIONALLY TO 7 FEET.    
TODAY  
SOUTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO  
25 KNOTS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET,  
THEN SUBSIDING TO 2 TO 4 FEET.    
TONIGHT  
WEST WINDS 20 TO 30 KNOTS INCREASING TO 30 KNOTS WITH  
A FEW GALE FORCE GUSTS TO 35 KNOTS POSSIBLE BY MIDNIGHT, THEN  
BECOMING NORTHWEST 20 TO 30 KNOTS LATE. ISOLATED RAIN SHOWERS IN  
THE EVENING. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO  
9 FEET.    
WEDNESDAY  
NORTHWEST WINDS 20 TO 30 KNOTS BACKING WEST. WAVES  
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
WEDNESDAY NIGHT  
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO  
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.    
THURSDAY  
WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM TO  
2 FEET.    
THURSDAY NIGHT  
WEST WINDS 5 TO 15 KNOTS BACKING EAST AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
FRIDAY  
EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 15 TO  
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET.    
SATURDAY  
SOUTH WINDS 15 TO 25 KNOTS VEERING NORTHWEST. A  
CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.   
  
  
  
LSZ263-112100-  
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-  
401 AM EST TUE NOV 11 2025  
  
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY  
EVENING...  
   
EARLY THIS MORNING  
SOUTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE  
OF SNOW SHOWERS. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.    
TODAY  
SOUTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO  
25 KNOTS BY LATE MORNING, THEN BECOMING WEST 20 TO 30 KNOTS BY  
MID AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS. WAVES  
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO  
3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TONIGHT  
WEST WINDS 20 TO 30 KNOTS VEERING NORTHWEST LATE.  
ISOLATED RAIN SHOWERS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY  
TO 11 FEET.    
WEDNESDAY  
NORTHWEST GALES TO 35 KNOTS BACKING WEST BY MID  
AFTERNOON. ISOLATED RAIN SHOWERS IN THE MORNING. WAVES BUILDING  
TO 6 TO 10 FEET OCCASIONALLY TO 13 FEET.    
WEDNESDAY NIGHT  
NORTHWEST WINDS 20 TO 30 KNOTS BECOMING WEST  
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 6 FEET  
OCCASIONALLY TO 8 FEET.    
THURSDAY  
WEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 3 TO  
5 FEET OCCASIONALLY TO 7 FEET.    
THURSDAY NIGHT  
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH  
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
FRIDAY  
SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH. WAVES  
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
SATURDAY  
SOUTH WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO  
25 KNOTS. A CHANCE OF RAIN SHOWERS. WAVES SUBSIDING TO 2 TO  
4 FEET, THEN BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.   
  
  
  
LSZ264-112100-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
401 AM EST TUE NOV 11 2025  
  
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE  
WEDNESDAY NIGHT...  
   
EARLY THIS MORNING  
SOUTHWEST WINDS 10 TO 20 KNOTS. A SLIGHT  
CHANCE OF RAIN AND SNOW SHOWERS. WAVES 2 TO 4 FEET.    
TODAY  
SOUTH WINDS 15 TO 25 KNOTS VEERING WEST BY MID  
AFTERNOON. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES BUILDING TO  
3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TONIGHT  
WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO  
30 KNOTS BY MIDNIGHT. SCATTERED RAIN SHOWERS. WAVES BUILDING TO  
5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
WEDNESDAY  
NORTHWEST GALES TO 35 KNOTS. ISOLATED RAIN SHOWERS.  
WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.    
WEDNESDAY NIGHT  
NORTHWEST GALES TO 35 KNOTS BECOMING WEST  
20 TO 30 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
THURSDAY  
WEST WINDS 20 TO 30 KNOTS. WAVES SUBSIDING TO 3 TO  
6 FEET OCCASIONALLY TO 8 FEET.    
THURSDAY NIGHT  
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH  
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
FRIDAY  
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING SOUTH 20 TO  
30 KNOTS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
SATURDAY  
SOUTH WINDS 20 TO 30 KNOTS VEERING NORTHWEST. A  
CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 7 TO 10 FEET  
OCCASIONALLY TO 13 FEET, THEN SUBSIDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.   
  
  
  
LSZ265-112100-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
401 AM EST TUE NOV 11 2025  
  
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE  
WEDNESDAY NIGHT...  
   
EARLY THIS MORNING  
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES 1 TO  
3 FEET.    
TODAY  
SOUTH WINDS 15 TO 25 KNOTS VEERING WEST BY MID  
AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS. A SLIGHT CHANCE OF  
RAIN SHOWERS IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.    
TONIGHT  
WEST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO  
35 KNOTS BY MIDNIGHT, THEN BECOMING NORTHWEST GALES TO 40 KNOTS  
LATE. SCATTERED RAIN SHOWERS. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.    
WEDNESDAY  
NORTHWEST GALES TO 40 KNOTS. NUMEROUS RAIN SHOWERS  
IN THE MORNING, THEN SCATTERED RAIN SHOWERS IN THE AFTERNOON.  
WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
WEDNESDAY NIGHT  
NORTHWEST GALES TO 40 KNOTS BECOMING WEST  
GALES TO 35 KNOTS AFTER MIDNIGHT. ISOLATED RAIN SHOWERS. WAVES  
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
THURSDAY  
WEST WINDS 20 TO 30 KNOTS. WAVES SUBSIDING TO 2 TO  
4 FEET.    
THURSDAY NIGHT  
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO  
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.    
FRIDAY  
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING SOUTH 20 TO  
30 KNOTS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
SATURDAY  
SOUTH GALES TO 35 KNOTS BECOMING WEST 20 TO 30 KNOTS.  
A CHANCE OF SHOWERS, THEN SHOWERS LIKELY. WAVES SUBSIDING TO 2 TO  
4 FEET.   
  
  
  
LSZ266-112100-  
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-  
401 AM EST TUE NOV 11 2025  
  
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE  
WEDNESDAY NIGHT...  
   
EARLY THIS MORNING  
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES 1 TO  
3 FEET.    
TODAY  
SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS  
BY LATE MORNING, THEN BECOMING SOUTHWEST 15 TO 25 KNOTS BY MID  
AFTERNOON. A CHANCE OF SNOW SHOWERS, POSSIBLY MIXED WITH RAIN.  
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TONIGHT  
WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST 20 TO  
30 KNOTS BY MIDNIGHT, THEN INCREASING TO GALES TO 35 KNOTS LATE.  
SCATTERED SNOW SHOWERS IN THE EVENING. SCATTERED RAIN SHOWERS.  
WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
WEDNESDAY  
NORTHWEST GALES TO 40 KNOTS. RAIN SHOWERS. WAVES  
BUILDING TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET.    
WEDNESDAY NIGHT  
NORTHWEST GALES TO 35 KNOTS DIMINISHING TO  
20 TO 30 KNOTS AFTER MIDNIGHT. NUMEROUS RAIN SHOWERS IN THE  
EVENING. SCATTERED RAIN SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING  
TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.    
THURSDAY  
WEST WINDS 20 TO 30 KNOTS. SCATTERED RAIN SHOWERS.  
WAVES SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.    
THURSDAY NIGHT  
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH  
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.    
FRIDAY  
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING SOUTH 20 TO  
30 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO  
6 TO 9 FEET OCCASIONALLY TO 11 FEET.    
SATURDAY  
SOUTH WINDS 20 TO 30 KNOTS. A CHANCE OF RAIN SHOWERS,  
THEN RAIN SHOWERS LIKELY. WAVES BUILDING TO 7 TO 10 FEET  
OCCASIONALLY TO 13 FEET, THEN SUBSIDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.   
  
  
  
LSZ267-112100-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
401 AM EST TUE NOV 11 2025  
  
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE  
WEDNESDAY NIGHT...  
   
EARLY THIS MORNING  
WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE  
OF RAIN AND SNOW SHOWERS. WAVES CALM TO 2 FEET.    
TODAY  
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 20 TO  
30 KNOTS BY LATE MORNING, THEN VEERING SOUTHWEST BY MID  
AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS IN THE MORNING. A  
CHANCE OF SNOW SHOWERS. RAIN SHOWERS LIKELY IN THE AFTERNOON.  
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
TONIGHT  
WEST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO 30 KNOTS  
BY MIDNIGHT, THEN BECOMING NORTHWEST GALES TO 35 KNOTS LATE.  
SCATTERED SNOW SHOWERS IN THE EVENING. NUMEROUS RAIN SHOWERS.  
WAVES SUBSIDING TO 2 TO 4 FEET, THEN BUILDING TO 6 TO 9 FEET  
OCCASIONALLY TO 11 FEET.    
WEDNESDAY  
NORTHWEST GALES TO 40 KNOTS. RAIN SHOWERS. WAVES  
BUILDING TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET.    
WEDNESDAY NIGHT  
NORTHWEST GALES TO 35 KNOTS. RAIN SHOWERS IN  
THE EVENING. ISOLATED SNOW SHOWERS. SCATTERED RAIN SHOWERS AFTER  
MIDNIGHT. WAVES SUBSIDING TO 7 TO 10 FEET OCCASIONALLY TO  
13 FEET.    
THURSDAY  
NORTHWEST GALES TO 35 KNOTS BACKING WEST IN THE  
AFTERNOON. NUMEROUS RAIN SHOWERS IN THE MORNING, THEN SCATTERED  
RAIN SHOWERS IN THE AFTERNOON. WAVES SUBSIDING TO 5 TO 8 FEET  
OCCASIONALLY TO 10 FEET.    
THURSDAY NIGHT  
NORTHWEST WINDS 20 TO 30 KNOTS BECOMING NORTH  
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS IN THE  
EVENING. WAVES SUBSIDING TO 2 TO 4 FEET.    
FRIDAY  
EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 15 TO  
25 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO  
3 TO 6 FEET OCCASIONALLY TO 8 FEET.    
SATURDAY  
SOUTH GALES TO 35 KNOTS DIMINISHING TO 20 TO  
30 KNOTS. RAIN SHOWERS. WAVES BUILDING TO 4 TO 7 FEET  
OCCASIONALLY TO 9 FEET.   
  
  
  
LSZ261-111500-  
MAFOR 1110/  
SUPERIOR WEST...GALE WARNING IN EFFECT...11440 12540 11640 11630  
11640 12740. WAVES 3 TO 6 FEET TODAY. WAVES 3 TO 6 FEET BUILDING  
TO 4 TO 7 FEET TONIGHT.   
  
SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11530 11430  
12530 12640 11740 19746 11740. A CHANCE OF SNOW SHOWERS THIS  
AFTERNOON. WAVES 2 TO 4 FEET BUILDING TO 3 TO 6 FEET TODAY. WAVES  
5 TO 8 FEET TONIGHT.   
  
SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11520 12430  
11530 11630 19636 11640 19646 11740 19746 11750 19756. WAVES 1 TO  
3 FEET BUILDING TO 3 TO 5 FEET TODAY. WAVES 3 TO 6 FEET BUILDING  
TO 5 TO 8 FEET TONIGHT.   
  
SUPERIOR EAST...GALE WARNING IN EFFECT...11520 12430 11546 11530  
19536 11636 19637 11646 11746. WAVES 1 TO 3 FEET BUILDING TO 3 TO  
6 FEET TODAY. WAVES 5 TO 8 FEET TONIGHT.   
  
  
  
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