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Grand Rapids, MI Local Forecast Office

15NM SSW Pentwater MI

Marine Point Forecast

[NOTICE]

This Afternoon
High: 25 °C
S 16km/h
< 1m
Tonight
Low: 22 °C
SSE 13km/h
< 1m
Wednesday
High: 24 °C
SSW 14km/h
< 1m
Wednesday Night
Low: 19 °C
NNW 26km/h
< 1m
Thursday
High: 21 °C
⇑N 37km/h
1m
Thursday Night
Low: 17 °C
N 29km/h⇓
< 1m
Friday
High: 22 °C
ENE 16km/h
< 1m
Friday Night
Low: 19 °C
N 16km/h
< 1m
Saturday
High: 23 °C
SSW 18km/h
< 1m

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 2:03 pm CDT Jul 15, 2025
Forecast Valid: 2pm CDT Jul 15, 2025-6pm CDT Jul 21, 2025

View Nearby Observations

Detailed Forecast

This Afternoon

S wind around 16 km/h. Sunny. Waves 1 m or less.

Tonight

SSE wind 11 to 13 km/h. A slight chance of showers and thunderstorms after 4am. Waves 1 m or less.

Wednesday

SSW wind around 14 km/h. A chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Waves 1 m or less.

Wednesday Night

S wind 16 to 26 km/h becoming NNW after midnight. Winds could gust as high as 32 km/h. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Waves 1 m or less.

Thursday

N wind 26 to 31 km/h increasing to 32 to 37 km/h in the afternoon. Winds could gust as high as 50 km/h. A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Waves around 1 m.

Thursday Night

N wind 24 to 29 km/h becoming ENE 16 to 21 km/h after midnight. Winds could gust as high as 39 km/h. Partly cloudy. Waves 1 m or less.

Friday

ENE wind 11 to 16 km/h becoming NW in the afternoon. Sunny. Waves 1 m or less.

Friday Night

N wind 11 to 16 km/h becoming SE after midnight. Partly cloudy. Waves 1 m or less.

Saturday

SSE wind 16 to 18 km/h becoming SSW in the morning. Winds could gust as high as 29 km/h. A chance of showers. Waves 1 m 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.