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:

Grand Rapids, MI Local Forecast Office

29NM W South Haven MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 49 °F
S 12kt
1-2ft
Thursday
High: 50 °F
SW 10kt
1-2ft
Thursday Night
Low: 43 °F
NNW 7kt⇓
1ft
Friday
High: 57 °F
SSE 13kt
< 1ft
Friday Night
Low: 43 °F
S 19kt
2-4ft
Saturday
High: 50 °F
WSW 19kt
4-5ft
Saturday Night
Low: 38 °F
WNW 22kt
4-6ft
Sunday
High: 43 °F
WNW 23kt⇓
6ft
Sunday Night
Low: 39 °F
NNW 16kt
3-4ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 2:36 pm CDT Apr 15, 2026
Forecast Valid: 6pm CDT Apr 15, 2026-6pm CDT Apr 22, 2026

View Nearby Observations

Detailed Forecast

Tonight

S wind 8 to 12 kt, with gusts as high as 20 kt. Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Patchy dense fog. Waves 1 to 2 ft.

Thursday

SW wind 8 to 10 kt becoming NW in the afternoon. Showers and thunderstorms likely before 1pm, then a slight chance of showers between 1pm and 4pm. Areas of dense fog before 4pm. Waves 1 to 2 ft.

Thursday Night

NNW wind 5 to 7 kt becoming variable and less than 5 kt. Patchy dense fog before 7pm, then Patchy dense fog between 8pm and 11pm. Waves around 1 ft.

Friday

SSE wind 8 to 13 kt. Mostly cloudy. Waves 1 ft or less.

Friday Night

SSE wind 17 to 19 kt becoming SSW after midnight. Showers likely, then showers and possibly a thunderstorm after 10pm. Waves 2 to 4 ft.

Saturday

WSW wind 15 to 19 kt becoming WNW in the afternoon. A chance of showers. Waves 4 to 5 ft.

Saturday Night

WNW wind 16 to 22 kt. Partly cloudy. Waves 4 to 6 ft.

Sunday

WNW wind 18 to 23 kt decreasing to 11 to 16 kt in the afternoon. Mostly sunny. Waves 6 ft subsiding to 3 ft.

Sunday Night

NW wind 10 to 16 kt becoming N after midnight. Partly cloudy. Waves 3 to 4 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.