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Marquette, MI Local Forecast Office

20NM W Ontonagon MI

Marine Point Forecast

[NOTICE]

Wednesday
High: 60 °F
NE 20kt
3-4ft

Small Craft Advisory
Wednesday Night
Low: 55 °F
ENE 10kt
1-3ft
Thursday
High: 67 °F
Light Wind
< 1ft
Thursday Night
Low: 58 °F
Light Wind
< 1ft
Friday
High: 70 °F
Light Wind
< 1ft
Friday Night
Low: 61 °F
Light Wind
< 1ft
Saturday
High: 69 °F
Light Wind
< 1ft
Saturday Night
Low: 59 °F
Light Wind
< 1ft
Sunday
High: 69 °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: 1:25 am CDT Jul 16, 2025
Forecast Valid: 1am CDT Jul 16, 2025-6pm CDT Jul 22, 2025

View Nearby Observations

Detailed Forecast

Wednesday

NE wind 15 to 20 kt. Showers and thunderstorms likely before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Waves 3 to 4 ft.

Wednesday Night

ENE wind 5 to 10 kt becoming NNW after midnight. A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then a chance of showers after 1am. Waves 1 to 3 ft.

Thursday

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Thursday Night

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

Friday

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

Friday Night

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

Saturday

Variable winds 5 kt or less. Partly 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.

*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.