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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

Tuesday
High: 57 °F
Light Wind
< 1ft
Tuesday Night
Low: 45 °F
Light Wind
< 1ft
Wednesday
High: 63 °F
SW 10kt
< 1ft
Wednesday Night
Low: 47 °F
Light Wind
< 1ft
Thursday
High: 62 °F
SW 10kt
< 1ft
Thursday Night
Low: 45 °F
Light Wind
< 1ft
Friday
High: 58 °F
E 10kt
< 1ft
Friday Night
Low: 43 °F
Light Wind
< 1ft
Saturday
High: 57 °F
ENE 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: 4:06 am CDT Jun 2, 2026
Forecast Valid: 4am CDT Jun 2, 2026-6pm CDT Jun 8, 2026

View Nearby Observations

Detailed Forecast

Tuesday

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

Tuesday Night

Variable winds 5 kt or less. Increasing clouds. Waves 1 ft or less.

Wednesday

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

Wednesday Night

Variable winds 5 kt or less. A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Waves 1 ft or less.

Thursday

SW wind 5 to 10 kt. A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 4pm, then a chance of showers and thunderstorms after 4pm. Waves 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms. Waves 1 ft or less.

Friday

E wind 5 to 10 kt. A chance of showers, mainly after 1pm. Waves 1 ft or less.

Friday Night

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

Saturday

ENE wind 5 to 10 kt. Partly sunny. 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.