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Duluth, MN Local Forecast Office

Grand Portage MN

Marine Point Forecast

[NOTICE]

Today
High: 55 °F
N 10kt
< 1ft
Tonight
Low: 37 °F
NW 10kt
< 1ft
Friday
High: 55 °F
Light Wind
< 1ft
Friday Night
Low: 38 °F
Light Wind
< 1ft
Saturday
High: 53 °F
Light Wind
< 1ft
Saturday Night
Low: 38 °F
Light Wind
< 1ft
Sunday
High: 55 °F
Light Wind
< 1ft
Sunday Night
Low: 40 °F
Light Wind
< 1ft
Memorial Day
High: 58 °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: 6:40 am CDT May 22, 2025
Forecast Valid: 6am CDT May 22, 2025-6pm CDT May 28, 2025

View Nearby Observations

Detailed Forecast

Today

N wind 5 to 10 kt, with gusts as high as 20 kt. A chance of sprinkles between 11am and noon, then a slight chance of showers after noon. Waves 1 ft or less.

Tonight

NW wind 5 to 10 kt becoming NNE in the evening. A slight chance of showers before 11pm, then a chance of sprinkles between 11pm and midnight. Waves 1 ft or less.

Friday

Variable winds 5 kt or less. Winds could gust as high as 15 kt. A chance of sprinkles after noon. Waves 1 ft or less.

Friday Night

Variable winds 5 kt or less. A chance of sprinkles before 10pm. Waves 1 ft or less.

Saturday

Variable winds 5 kt or less. Mostly sunny. 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.

Memorial Day

Variable winds 5 kt or less. 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.