Navigation
Entries with Click to expand

External Links

Affiliations

Style Options

Use Metric:
|



Marine Weather Forecast from Environment Canada

Winds


Issued 06:30 PM EDT 09 August 2026

Tonight and Monday. Wind variable 10 knots becoming light this evening then becoming west 10 near noon Monday.

Extended Forecast


Issued 06:30 PM EDT 09 August 2026
Tuesday Wind light.
Wednesday Wind light.
Thursday Wind light becoming northwest 15 knots.

Waves


Issued 06:30 PM EDT 09 August 2026

Tonight and Monday. Waves 0.5 metres or less.

Weather & Visibility


Issued 06:30 PM EDT 09 August 2026

Tonight and Monday.Scattered showers ending overnight with a risk of thunderstorms. Fog patches.

 

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



  
451   
FZUS63 KMQT 092002  
GLFLS   
  
OPEN LAKE FORECAST FOR LAKE SUPERIOR  
NATIONAL WEATHER SERVICE MARQUETTE MI  
402 PM EDT SUN AUG 9 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 29.9 INCH TROUGH MOVES OVER THE LAKE THROUGH TONIGHT. THEN, WEAK   
RIDGING OF 29.9 INCHES RETURNS ON MONDAY AND HOLDS THROUGH TUESDAY.   
ANOTHER WEAK TROUGH AT 29.8 INCHES MOVES OVER THE LAKE TUESDAY NIGHT   
INTO WEDNESDAY BEFORE HIGH PRESSURE GRADUALLY BUILDS OVER THE GREAT   
LAKES FROM WESTERN CANADA THROUGH FRIDAY TO 30.1 INCHES.  
  
LSZ162-100800-  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND  
PORTAGE MN BEYOND 5NM-  
402 PM EDT SUN AUG 9 2026 /302 PM CDT SUN AUG 9 2026/  
   
LATE THIS AFTERNOON  
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TONIGHT  
SOUTH WINDS 5 TO 15 KNOTS VEERING WEST AFTER MIDNIGHT.  
PATCHY FOG. WAVES CALM TO 2 FEET.    
MONDAY  
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST IN THE  
AFTERNOON, THEN BECOMING SOUTH 10 TO 20 KNOTS LATE. WAVES CALM TO  
2 FEET.    
MONDAY NIGHT  
SOUTH WINDS 5 TO 15 KNOTS BACKING NORTH AFTER  
MIDNIGHT. A SLIGHT CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT. A  
SLIGHT CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.    
TUESDAY  
NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH BY MID  
AFTERNOON. A SLIGHT CHANCE OF SHOWERS THROUGH EARLY AFTERNOON.  
WAVES CALM TO 2 FEET.    
TUESDAY NIGHT  
NORTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF  
SHOWERS. WAVES CALM TO 2 FEET.    
WEDNESDAY  
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT  
NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY  
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
FRIDAY  
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST. WAVES CALM  
TO 2 FEET.   
  
  
  
LSZ263-100800-  
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-  
402 PM EDT SUN AUG 9 2026  
   
LATE THIS AFTERNOON  
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TONIGHT  
EAST WINDS 5 TO 15 KNOTS BECOMING WEST LESS THAN  
10 KNOTS AFTER MIDNIGHT, THEN INCREASING TO 5 TO 15 KNOTS LATE.  
PATCHY FOG. WAVES CALM TO 2 FEET.    
MONDAY  
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST IN THE  
AFTERNOON, THEN INCREASING TO 10 TO 20 KNOTS LATE. PATCHY FOG  
THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT  
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST AFTER  
MIDNIGHT, THEN DIMINISHING TO LESS THAN 10 KNOTS LATE. A SLIGHT  
CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY  
NORTH WINDS LESS THAN 10 KNOTS BECOMING SOUTH 5 TO  
15 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS THROUGH  
EARLY AFTERNOON. WAVES CALM TO 2 FEET.    
TUESDAY NIGHT  
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST LESS  
THAN 10 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES CALM TO  
2 FEET.    
WEDNESDAY  
WEST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO  
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT  
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY  
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. WAVES  
CALM TO 2 FEET.    
FRIDAY  
NORTH WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM TO  
2 FEET.   
  
  
  
LSZ264-100800-  
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU  
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-  
402 PM EDT SUN AUG 9 2026  
   
LATE THIS AFTERNOON  
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
TONIGHT  
SOUTH WINDS LESS THAN 10 KNOTS VEERING WEST LATE.  
PATCHY FOG THROUGH MIDNIGHT, THEN AREAS OF DENSE FOG AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
MONDAY  
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST IN THE  
AFTERNOON. PATCHY FOG. WAVES CALM TO 2 FEET.    
MONDAY NIGHT  
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST LATE.  
WAVES CALM TO 2 FEET.    
TUESDAY  
WEST WINDS LESS THAN 10 KNOTS BACKING SOUTH BY MID  
AFTERNOON. A SLIGHT CHANCE OF SHOWERS THROUGH EARLY AFTERNOON.  
WAVES CALM TO 2 FEET.    
TUESDAY NIGHT  
SOUTHWEST WINDS LESS THAN 10 KNOTS VEERING WEST  
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
WEDNESDAY  
WEST WINDS LESS THAN 10 KNOTS. WAVES CALM TO 2 FEET.   
WEDNESDAY NIGHT  
NORTHWEST WINDS LESS THAN 10 KNOTS INCREASING  
TO 5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
THURSDAY  
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
FRIDAY  
NORTHWEST WINDS LESS THAN 10 KNOTS BACKING SOUTH. WAVES  
CALM TO 2 FEET.   
  
  
  
LSZ265-100800-  
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI  
BEYOND 5NM FROM SHORE-  
402 PM EDT SUN AUG 9 2026  
   
LATE THIS AFTERNOON  
EAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE  
OF SHOWERS. WAVES CALM TO 2 FEET.    
TONIGHT  
EAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER MIDNIGHT,  
THEN BACKING WEST LATE. A SLIGHT CHANCE OF SHOWERS THROUGH  
MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
MONDAY  
WEST WINDS 5 TO 15 KNOTS BACKING EAST LATE. WAVES CALM  
TO 2 FEET.    
MONDAY NIGHT  
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST  
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY  
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING EAST BY MID  
AFTERNOON. A SLIGHT CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.    
TUESDAY NIGHT  
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING WEST AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
WEDNESDAY  
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT  
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY  
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST. WAVES  
CALM TO 2 FEET.    
FRIDAY  
NORTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM  
TO 2 FEET.   
  
  
  
LSZ266-100800-  
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-  
402 PM EDT SUN AUG 9 2026  
   
LATE THIS AFTERNOON  
EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE  
OF SHOWERS. WAVES CALM TO 2 FEET.    
TONIGHT  
EAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER MIDNIGHT.  
A SLIGHT CHANCE OF SHOWERS THROUGH MIDNIGHT. PATCHY FOG. WAVES  
CALM TO 2 FEET.    
MONDAY  
WEST WINDS 5 TO 15 KNOTS. PATCHY FOG THROUGH EARLY  
AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT  
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY  
SOUTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SHOWERS.  
WAVES CALM TO 2 FEET.    
TUESDAY NIGHT  
SOUTH WINDS 5 TO 15 KNOTS VEERING WEST AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
WEDNESDAY  
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST BY MID  
AFTERNOON. WAVES CALM TO 2 FEET.    
WEDNESDAY NIGHT  
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY  
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.    
FRIDAY  
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM  
TO 2 FEET.   
  
  
  
LSZ267-100800-  
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF  
SHORE TO THE US/CANADIAN BORDER-  
402 PM EDT SUN AUG 9 2026  
   
LATE THIS AFTERNOON  
EAST WINDS 10 TO 20 KNOTS. WAVES CALM TO  
2 FEET.    
TONIGHT  
NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH LATE. A  
SLIGHT CHANCE OF SHOWERS THROUGH MIDNIGHT. PATCHY FOG. WAVES CALM  
TO 2 FEET.    
MONDAY  
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST IN THE  
AFTERNOON, THEN VEERING NORTHWEST LATE. PATCHY FOG THROUGH EARLY  
AFTERNOON. WAVES CALM TO 2 FEET.    
MONDAY NIGHT  
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER  
MIDNIGHT. WAVES CALM TO 2 FEET.    
TUESDAY  
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST BY MID  
AFTERNOON. A SLIGHT CHANCE OF SHOWERS THROUGH EARLY AFTERNOON.  
WAVES CALM TO 2 FEET.    
TUESDAY NIGHT  
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO  
2 FEET.    
WEDNESDAY  
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.   
WEDNESDAY NIGHT  
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO  
2 FEET.    
THURSDAY  
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO  
15 KNOTS. WAVES CALM TO 2 FEET.    
FRIDAY  
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.   
  
  
  
LSZ261-100200-  
MAFOR 0921/  
SUPERIOR WEST 12300 11500 14600 11510. WAVES 1 FOOT OR LESS.   
  
SUPERIOR NORTH CENTRAL 13400 12504 11500 11600 11510. WAVES 1  
FOOT OR LESS.   
  
SUPERIOR SOUTH CENTRAL 11210 12200 11800 11700 12610 11810. WAVES  
2 FEET OR LESS.   
  
SUPERIOR EAST 11210 11110 11100 12804 11700 12600. 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

BAROMETER
A barometer is an instrument used to measure atmospheric pressure. A barometer is commonly used for weather prediction, as high air pressure in a region indicates fair weather while low pressure indicates that storms are more likely. When used in combination with wind observations, reasonably accurate short-term forecasts can be made.