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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

Today
High: 33 °F
⇑ENE 15kt
< 1ft

Small Craft Advisory
Tonight
Low: 31 °F
ENE 15kt
< 1ft

Small Craft Advisory
Tuesday
High: 31 °F
ENE 15kt
< 1ft

Small Craft Advisory
Tuesday Night
Low: 18 °F
NNE 10kt
< 1ft

Small Craft Advisory
Wednesday
High: 27 °F
ENE 10kt
< 1ft
Wednesday Night
Low: 22 °F
ENE 15kt
1-3ft
Thursday
High: 30 °F
ENE 25kt
7ft
Thursday Night
Low: 27 °F
ENE 25kt
6-7ft
Friday
High: 34 °F
ENE 20kt
4-5ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 8:26 am CDT Mar 30, 2026
Forecast Valid: 8am CDT Mar 30, 2026-6pm CDT Apr 5, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds less than 5 kt becoming ENE 10 to 15 kt in the morning. Mostly cloudy. Waves 1 ft or less.

Tonight

ENE wind around 15 kt, with gusts as high as 25 kt. A chance of snow showers, mainly after 4am. Waves 1 ft or less.

Tuesday

ENE wind 10 to 15 kt, with gusts as high as 25 kt. Snow showers likely, mainly before 1pm. Waves 1 ft or less.

Tuesday Night

NNE wind 5 to 10 kt. A chance of snow showers before 1am. Waves 1 ft or less.

Wednesday

NNE wind around 10 kt becoming E in the afternoon. Mostly sunny. Waves 1 ft or less.

Wednesday Night

ENE wind 10 to 15 kt, with gusts as high as 25 kt. Mostly cloudy. Waves 1 to 3 ft.

Thursday

ENE wind 15 to 25 kt, with gusts as high as 35 kt. A chance of snow, mainly after 1pm. Widespread freezing spray after noon. Waves 4 ft building to 7 ft.

Thursday Night

ENE wind 20 to 25 kt, with gusts as high as 40 kt. Snow likely. Widespread freezing spray between 3am and 4am, then Widespread freezing spray after 5am. Waves 6 to 7 ft.

Friday

ENE wind 15 to 20 kt, with gusts as high as 30 kt. A slight chance of snow. Widespread freezing spray before 8am. Waves 4 to 5 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.