South Haven Light, South Haven, MI (SVNM4) — Live Marine Conditions & Buoy Data
NOAA station SVNM4, South Haven Light, South Haven, MI, reports real-time marine conditions from 42.401°N, 86.288°W in Lake Michigan (Michigan). Readings refresh roughly every 10 minutes, and Big Buoy adds a solunar table and a multi-day weather outlook for the area.
Lake Michigan Marine Conditions — South Haven Light, South Haven, MI is one of several stations in Lake Michigan. See live buoy data and solunar for the whole area.
Current conditions at South Haven Light, South Haven, MI
As of October 19, 2026 at 19:20 UTC, South Haven Light, South Haven, MI (SVNM4) is reporting air temperature 47°F and wind from the W at 7 mph gusting 8 mph.
- Air temperature
- 47°F
- Wind
- W 7 mph (gust 8)
Observed October 19, 2026 at 19:20 UTC from NOAA NDBC station SVNM4. Readings update about every 10 minutes.
What NOAA buoy SVNM4 measures
As a NOAA meteorological station, SVNM4 reports wind speed, gusts and direction, barometric pressure, air and water temperature, and — where wave sensors are fitted — significant wave height, swell period, and wave direction.
What to watch in Lake Michigan
Lake Michigan’s long north-south axis lets a sustained northerly or southerly wind build large, steep seas over its full fetch, sometimes within hours. Summer stratification is sharp and wind-driven upwelling can swing nearshore water temperature 15–20°F in a day, so watch wind direction and buoy temperatures together.
Frequently asked questions
- What is the air temperature at South Haven Light, South Haven?
- Air temperature at South Haven Light, South Haven was 47°F. Measured October 19, 2026 at 19:20 UTC by NOAA station SVNM4 (South Haven Light, South Haven, MI).
- What is the wind doing at South Haven Light, South Haven?
- Wind at South Haven Light, South Haven was from the W at 7 mph, with peak gusts to 8 mph. Measured October 19, 2026 at 19:20 UTC by NOAA station SVNM4 (South Haven Light, South Haven, MI). NDBC records wind at the station’s anemometer height, which is not the 10 m height used in marine forecasts.
- Where is NOAA buoy SVNM4 located?
- South Haven Light, South Haven, MI (SVNM4) reports from 42.401°N, 86.288°W in Lake Michigan (Michigan).
- How often is NOAA buoy SVNM4 updated?
- Station SVNM4 typically reports new observations about every 10 minutes. Big Buoy refreshes continuously so you always see the latest readings, alongside a solunar table for the area.
- What does NOAA buoy SVNM4 measure?
- Big Buoy shows wind, barometric pressure, air and water temperature, and wave height and period where available for South Haven Light, South Haven, MI, plus solunar peak windows and a multi-day weather outlook.
- Is Big Buoy free to use?
- Yes. Live data for South Haven Light, South Haven, MI and every other NOAA buoy is free with no account required. Big Buoy Pro adds the Wind Tab, the Depth Chart, satellite overlays (sea surface temp, chlorophyll, currents), 16-day forecasts, and forecast model switching.