National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

For More Weather Information:

Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

    • Thursday

      Thursday:Variable winds 5 kt or less. Patchy dense fog before 7am. Waves 1 ft or less.

      High: 63 °F

      Light Wind
      < 1ft

    • Thursday Night

      Thursday Night:Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.

      Low: 48 °F

      Light Wind
      < 1ft

    • Friday

      Friday:Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.

      High: 61 °F

      Light Wind
      < 1ft

    • Friday Night

      Friday Night:Variable winds 5 kt or less. A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Waves 1 ft or less.

      Low: 48 °F

      Light Wind
      < 1ft

    • Saturday

      Saturday:Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.

      High: 65 °F

      Light Wind
      < 1ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.

      Low: 48 °F

      Light Wind
      < 1ft

    • Sunday

      Sunday:SW wind 5 to 10 kt. Mostly sunny. Waves 1 ft or less.

      High: 71 °F

      SW 10kt
      < 1ft

    • Sunday Night

      Sunday Night:WSW wind around 10 kt, with gusts as high as 15 kt. Partly cloudy. Waves around 1 ft.

      Low: 50 °F

      WSW 10kt
      1ft

    • Monday

      Monday:SW wind 10 to 15 kt, with gusts as high as 20 kt. Mostly sunny. Waves 1 to 2 ft.

      High: 75 °F

      SW 15kt
      1-2ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 1:21 am CDT Jul 9, 2026
Forecast Valid: 1am CDT Jul 9, 2026-6pm CDT Jul 15, 2026

View Nearby Observations

Detailed Forecast

Thursday
Variable winds 5 kt or less. Patchy dense fog before 7am. Waves 1 ft or less.
Thursday Night
Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.
Friday
Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.
Friday Night
Variable winds 5 kt or less. A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Waves 1 ft or less.
Saturday
Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.
Saturday Night
Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.
Sunday
SW wind 5 to 10 kt. Mostly sunny. Waves 1 ft or less.
Sunday Night
WSW wind around 10 kt, with gusts as high as 15 kt. Partly cloudy. Waves around 1 ft.
Monday
SW wind 10 to 15 kt, with gusts as high as 20 kt. Mostly sunny. Waves 1 to 2 ft.

*Notices:

  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

Point Forecast: 47.86°N 89.86°W
Last Update: 1:21 am CDT Jul 9, 2026
Forecast Valid: 1am CDT Jul 9, 2026-6pm CDT Jul 15, 2026
  Forecast Discussion
  Get as KML Get as XML
    Great Lakes Water Temperature (Graphic)

RADAR & SATELLITE IMAGES

 Link to Satellite Data