For More Weather Information:

Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

Wednesday
High: 70 °F
NW 10kt
< 1ft
Wednesday Night
Low: 55 °F
NW 10kt
< 1ft
Thursday
High: 64 °F
Light Wind
< 1ft
Thursday Night
Low: 49 °F
Light Wind
< 1ft
Friday
High: 63 °F
Light Wind
< 1ft
Friday Night
Low: 52 °F
Light Wind
< 1ft
Saturday
High: 66 °F
Light Wind
< 1ft
Saturday Night
Low: 58 °F
Light Wind
< 1ft
Sunday
High: 67 °F
ESE 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 1:26 am CDT Aug 26, 2026
Forecast Valid: 2am CDT Aug 26, 2026-6pm CDT Sep 1, 2026

View Nearby Observations

Detailed Forecast

Wednesday

SW wind 5 to 10 kt becoming NW in the afternoon. Winds could gust as high as 15 kt. A chance of showers, mainly between 1pm and 5pm. Waves 1 ft or less.

Wednesday Night

NW wind 5 to 10 kt, with gusts as high as 15 kt. Mostly clear. Waves 1 ft or less.

Thursday

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

Friday Night

Variable winds 5 kt or less. Mostly cloudy. Waves 1 ft or less.

Saturday

Variable winds 5 kt or less. A chance of showers, mainly after 1pm. Waves 1 ft or less.

Saturday Night

Variable winds 5 kt or less. A chance of showers, with thunderstorms also possible after 1am. Waves 1 ft or less.

Sunday

NE wind 5 to 10 kt becoming ESE in the afternoon. A slight chance of showers, with thunderstorms also possible after 1pm. Waves 1 ft or less.

*Notices:

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.
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.