Sinlaku Continues to Impact the Marianas; Severe Weather for the Central Plains and Northeast; Record Warmth for mid-Atlantic to Southeast

Sinlaku continues to affect the Marianas as it moves north through Friday. Meanwhile, severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley today and for the Central/Southern Plains on Friday. Considerable flooding impacts are ongoing in the Upper Great Lakes, and expected to continue through the weekend. Fire weather concerns persist in the Plains. Read More >

Hazardous Weather Conditions

For More Weather Information:

Grand Rapids, MI Local Forecast Office

29NM W South Haven MI

Marine Point Forecast

[NOTICE]

This Afternoon
High: 52 °F
W 9kt
1-2ft
Tonight
Low: 43 °F
N 7kt⇓
< 1ft
Friday
High: 57 °F
SSE 13kt
1-2ft
Friday Night
Low: 42 °F
SSW 19kt
3-4ft
Saturday
High: 48 °F
WNW 19kt
3-4ft
Saturday Night
Low: 39 °F
WNW 18kt
3-4ft
Sunday
High: 43 °F
WNW 18kt
3-4ft
Sunday Night
Low: 39 °F
N 10kt
2-3ft
Monday
High: 48 °F
E 8kt
1-3ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 12:21 pm CDT Apr 16, 2026
Forecast Valid: 12pm CDT Apr 16, 2026-6pm CDT Apr 22, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

W wind around 9 kt becoming NNW. A chance of showers and thunderstorms, mainly before 2pm. Areas of dense fog. Waves 1 to 2 ft.

Tonight

N wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Widespread dense fog, mainly between 2am and 4am. Waves 1 ft or less.

Friday

SSE wind 7 to 13 kt. Areas of dense fog before 10am, then Patchy dense fog between 11am and noon. Waves 1 to 2 ft.

Friday Night

SSE wind 16 to 19 kt becoming SSW after midnight. Showers likely before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then a chance of showers after 4am. Some of the storms could be severe. Waves 3 to 4 ft.

Saturday

WNW wind 13 to 19 kt. A chance of showers, mainly before 1pm. Waves 3 to 4 ft.

Saturday Night

WNW wind 15 to 18 kt. Mostly clear. Waves 3 to 4 ft.

Sunday

WNW wind 10 to 18 kt becoming NNW in the afternoon. Sunny. Waves 3 to 4 ft.

Sunday Night

N wind around 10 kt. Mostly clear. Waves 2 to 3 ft.

Monday

E wind around 8 kt becoming SSE in the afternoon. Sunny. Waves 1 to 3 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.