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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

Today
High: 26 °F
WNW 15kt
< 1ft

Small Craft Advisory
Tonight
Low: 13 °F
W 10kt
< 1ft

Small Craft Advisory
Saturday
High: 31 °F
SSW 15kt
1-2ft
Saturday Night
Low: 23 °F
Light Wind
1-2ft
Sunday
High: 36 °F
Light Wind
< 1ft
Sunday Night
Low: 25 °F
Light Wind
< 1ft
Monday
High: 35 °F
E 10kt
< 1ft
Monday Night
Low: 30 °F
ENE 15kt
1-2ft
Tuesday
High: 36 °F
ENE 15kt
3ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 6:06 am CDT Mar 27, 2026
Forecast Valid: 6am CDT Mar 27, 2026-6pm CDT Apr 2, 2026

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Detailed Forecast

Today

N wind 5 to 15 kt becoming WNW in the morning. Winds could gust as high as 20 kt. A chance of flurries between 7am and 1pm, then a slight chance of snow showers after 1pm. Waves 1 ft or less.

Tonight

W wind 5 to 10 kt, with gusts as high as 20 kt. Partly cloudy. Waves 1 ft or less.

Saturday

W wind 5 to 15 kt becoming SSW in the afternoon. A slight chance of snow showers between 1pm and 3pm, and then a chance for flurries. Waves 1 to 2 ft.

Saturday Night

Variable winds 5 kt or less. Partly cloudy. Waves 1 to 2 ft.

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

N wind 5 to 10 kt becoming E in the afternoon. A slight chance of snow after 1pm. Waves 1 ft or less.

Monday Night

ENE wind 10 to 15 kt, with gusts as high as 20 kt. A slight chance of snow before 1am, then a chance of rain and snow. Waves 1 to 2 ft.

Tuesday

ENE wind around 15 kt, with gusts as high as 25 kt. A chance of rain and snow before 1pm, then a chance of rain. Waves around 3 ft.

*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.