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Marquette, MI Local Forecast Office

28NM W Ontonagon MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 65 °F
S 10kt
< 1ft
Tuesday
High: 72 °F
S 15kt
1-2ft
Tuesday Night
Low: 64 °F
SSW 15kt
2ft
Wednesday
High: 68 °F
WSW 25kt
6ft
Wednesday Night
Low: 60 °F
WNW 20kt
4ft
Thursday
High: 69 °F
WNW 10kt
< 1ft
Thursday Night
Low: 64 °F
S 15kt
< 1ft
Friday
High: 72 °F
SSW 15kt
2ft
Friday Night
Low: 62 °F
SSW 15kt
2ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 8:50 pm CDT Sep 7, 2026
Forecast Valid: 8pm CDT Sep 7, 2026-6pm CDT Sep 14, 2026

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Detailed Forecast

Tonight

ESE wind around 10 kt becoming S after midnight. Winds could gust as high as 20 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Waves 1 ft or less.

Tuesday

S wind around 15 kt, with gusts as high as 25 kt. Showers and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and noon. Waves 1 to 2 ft.

Tuesday Night

SSW wind around 15 kt, with gusts as high as 25 kt. Mostly cloudy during the early evening, then gradual clearing. Waves around 2 ft.

Wednesday

WSW wind 15 to 25 kt, with gusts as high as 40 kt. Sunny. Waves 3 ft building to 6 ft.

Wednesday Night

WNW wind 10 to 20 kt, with gusts as high as 35 kt. Partly cloudy. Waves 4 ft subsiding to 1 ft.

Thursday

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

Thursday Night

S wind 5 to 15 kt, with gusts as high as 25 kt. Mostly clear. Waves 1 ft or less.

Friday

SSW wind around 15 kt, with gusts as high as 30 kt. A chance of showers. Waves around 2 ft.

Friday Night

SSW wind 10 to 15 kt, with gusts as high as 25 kt. Showers likely. Waves around 2 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.