Heat Across the Center of the Nation; Severe Thunderstorms Across the Great Lakes and Ohio Valley

Heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest into Monday. Fire weather concerns continue for portions of the Intermountain West. Active monsoonal moisture fuels thunderstorms over the Southwest with possible flash flooding. Tropical cyclone Fausto in the Pacific, should weaken as it approaches Hawaii; Dangerous surf, swells and rip currents are expected. Read More >

Hazardous Weather Conditions

For More Weather Information:

Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

Tonight
Low: 52 °F
Light Wind
< 1ft
Monday
High: 65 °F
NE 10kt
< 1ft
Monday Night
Low: 51 °F
Light Wind
< 1ft
Tuesday
High: 64 °F
Light Wind
< 1ft
Tuesday Night
Low: 51 °F
Light Wind
< 1ft
Wednesday
High: 66 °F
Light Wind
< 1ft
Wednesday Night
Low: 52 °F
Light Wind
< 1ft
Thursday
High: 68 °F
Light Wind
< 1ft
Thursday Night
Low: 53 °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: 4:22 pm CDT Jul 26, 2026
Forecast Valid: 6pm CDT Jul 26, 2026-6pm CDT Aug 2, 2026

View Nearby Observations

Detailed Forecast

Tonight

Variable winds 5 kt or less. A slight chance of showers after 3am. Patchy dense fog before 1am. Waves 1 ft or less.

Monday

NE wind 5 to 10 kt becoming E in the afternoon. A chance of showers, mainly between 9am and 2pm. Waves 1 ft or less.

Monday Night

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

Tuesday

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

Tuesday Night

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

Wednesday

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

Wednesday Night

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

Thursday

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

Thursday Night

Variable winds 5 kt or less. 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.