For More Weather Information:

Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

Today
High: 61 °F
ENE 15kt
1ft

Small Craft Advisory
Tonight
Low: 53 °F
NE 15kt
1-2ft

Small Craft Advisory
Tuesday
High: 68 °F
SW 10kt
1ft
Tuesday Night
Low: 50 °F
WSW 10kt
< 1ft
Wednesday
High: 70 °F
SW 10kt
1-2ft
Wednesday Night
Low: 51 °F
SW 10kt
< 1ft
Thursday
High: 70 °F
WSW 10kt
< 1ft
Thursday Night
Low: 50 °F
Light Wind
< 1ft
Friday
High: 65 °F
SE 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: 5:37 am CDT Jun 29, 2026
Forecast Valid: 6am CDT Jun 29, 2026-6pm CDT Jul 5, 2026

View Nearby Observations

Detailed Forecast

Today

ENE wind 5 to 15 kt. A chance of showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 5pm. Waves around 1 ft.

Tonight

NE wind 5 to 15 kt becoming SW after midnight. Winds could gust as high as 25 kt. A chance of showers and thunderstorms, mainly between 7pm and 3am. Waves 1 to 2 ft.

Tuesday

SW wind 5 to 10 kt, with gusts as high as 15 kt. Partly sunny. Waves around 1 ft.

Tuesday Night

WSW wind around 10 kt, with gusts as high as 20 kt. Partly cloudy. Waves 1 ft or less.

Wednesday

SW wind 5 to 10 kt, with gusts as high as 20 kt. A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Waves 1 to 2 ft.

Wednesday Night

SW wind 5 to 10 kt. A chance of showers and thunderstorms. Waves 1 ft or less.

Thursday

WSW wind 5 to 10 kt. A slight chance of showers and thunderstorms after 1pm. Waves 1 ft or less.

Thursday Night

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

Friday

NE wind 5 to 10 kt becoming SSE in the afternoon. A chance of showers and thunderstorms. 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.