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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

Tonight
Low: 44 °F
WNW 10kt
< 1ft
Juneteenth
High: 58 °F
SW 10kt
< 1ft
Friday Night
Low: 44 °F
Light Wind
< 1ft
Saturday
High: 58 °F
Light Wind
< 1ft
Saturday Night
Low: 43 °F
Light Wind
< 1ft
Sunday
High: 56 °F
Light Wind
< 1ft
Sunday Night
Low: 43 °F
Light Wind
< 1ft
Monday
High: 59 °F
Light Wind
< 1ft
Monday Night
Low: 43 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 5:56 pm CDT Jun 18, 2026
Forecast Valid: 6pm CDT Jun 18, 2026-6pm CDT Jun 25, 2026

View Nearby Observations

Detailed Forecast

Tonight

WNW wind 5 to 10 kt. A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Waves 1 ft or less.

Juneteenth

WNW wind 5 to 10 kt becoming SW in the afternoon. Mostly sunny. Waves 1 ft or less.

Friday Night

Variable winds 5 kt or less. A slight chance of showers after 5am. Waves 1 ft or less.

Saturday

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

Saturday Night

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

Sunday

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

Sunday Night

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

Monday

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

Monday Night

Variable winds 5 kt or less. Partly cloudy. 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.