Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

For More Weather Information:

Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

Overnight
Low: 55 °F
NNE 10kt
< 1ft
Wednesday
High: 62 °F
NNE 10kt
< 1ft
Wednesday Night
Low: 60 °F
Light Wind
< 1ft
Thursday
High: 67 °F
SSW 10kt
< 1ft
Thursday Night
Low: 55 °F
W 10kt
< 1ft
Friday
High: 67 °F
SW 10kt
< 1ft
Friday Night
Low: 56 °F
Light Wind
< 1ft
Saturday
High: 67 °F
Light Wind
< 1ft
Saturday Night
Low: 56 °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: 12:40 am CDT Jul 16, 2025
Forecast Valid: 12am CDT Jul 16, 2025-6pm CDT Jul 22, 2025

View Nearby Observations

Detailed Forecast

Overnight

NNE wind 5 to 10 kt, with gusts as high as 15 kt. A chance of showers. Waves 1 ft or less.

Wednesday

NNE wind around 10 kt, with gusts as high as 20 kt. A chance of showers, mainly before 4pm. Waves 1 ft or less.

Wednesday Night

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

Thursday

NNW wind 5 to 10 kt becoming SSW in the afternoon. Sunny. Waves 1 ft or less.

Thursday Night

W wind 5 to 10 kt. Partly cloudy. Waves 1 ft or less.

Friday

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

Friday Night

Variable winds 5 kt or less. A chance of showers, with thunderstorms also possible after 1am. Waves 1 ft or less.

Saturday

Variable winds 5 kt or less. A chance of showers, mainly before 1pm. Waves 1 ft or less.

Saturday Night

Variable winds 5 kt or less. Partly cloudy. 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.