Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

Hazardous Weather Conditions

For More Weather Information:

Marquette, MI Local Forecast Office

8NM E Copper Harbor MI

Marine Point Forecast

[NOTICE]

Wednesday
High: 36 °F
Light Wind
< 1ft
Wednesday Night
Low: 34 °F
Light Wind
< 1ft
Thursday
High: 37 °F
Light Wind
< 1ft
Thursday Night
Low: 34 °F
SE 10kt
< 1ft
Friday
High: 43 °F
SE 15kt
1-3ft
Friday Night
Low: 32 °F
SSW 20kt
3-4ft
Saturday
High: 35 °F
NW 25kt
8ft
Saturday Night
Low: 25 °F
WNW 30kt
9-11ft
Sunday
High: 32 °F
NW 30kt⇓
12ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 3:12 am CDT Apr 15, 2026
Forecast Valid: 4am CDT Apr 15, 2026-6pm CDT Apr 21, 2026

View Nearby Observations

Detailed Forecast

Wednesday

Variable winds 5 kt or less. Areas of dense fog before 1pm. Waves 1 ft or less.

Wednesday Night

Variable winds 5 kt or less. Patchy fog. Waves 1 ft or less.

Thursday

Variable winds 5 kt or less. Patchy fog before 8am. Waves 1 ft or less.

Thursday Night

SE wind around 10 kt. Mostly cloudy. Waves 1 ft or less.

Friday

SE wind 10 to 15 kt, with gusts as high as 25 kt. Mostly cloudy. Waves 1 to 3 ft.

Friday Night

SSE wind 15 to 20 kt becoming SW after midnight. Winds could gust as high as 30 kt. Showers. Waves 3 to 4 ft.

Saturday

NW wind 20 to 25 kt, with gusts as high as 35 kt. A chance of rain and snow showers. Waves 4 ft building to 8 ft.

Saturday Night

WNW wind 25 to 30 kt, with gusts as high as 40 kt. A chance of snow showers. Waves 9 to 11 ft.

Sunday

NW wind 25 to 30 kt decreasing to 15 to 20 kt in the afternoon. Winds could gust as high as 40 kt. Mostly cloudy. Waves 12 ft subsiding to 6 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.