Sturgeon Point Light, MI (SPTM4) — Live Marine Conditions & Buoy Data
NOAA station SPTM4, Sturgeon Point Light, MI, reports real-time marine conditions from 44.713°N, 83.273°W in Lake Huron (Michigan). Readings refresh roughly every 10 minutes, and Big Buoy adds a solunar table and a multi-day weather outlook for the area.
Lake Huron Marine Conditions — Sturgeon Point Light, MI is one of several stations in Lake Huron. See live buoy data and solunar for the whole area.
Current conditions at Sturgeon Point Light, MI
As of August 21, 2026 at 18:50 UTC, Sturgeon Point Light, MI (SPTM4) is reporting wind from the SSE at 11 mph gusting 18 mph.
- Wind
- SSE 11 mph (gust 18)
Observed August 21, 2026 at 18:50 UTC from NOAA NDBC station SPTM4. Readings update about every 10 minutes.
What NOAA buoy SPTM4 measures
As a NOAA meteorological station, SPTM4 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 Huron
Lake Huron pairs a big open main basin with the sheltered waters of Georgian Bay and the North Channel, so conditions vary a lot with where you are. The open lake builds steep, short-period seas on a sustained blow — check the buoy nearest your water and mind the wind direction.
Frequently asked questions
- Where is NOAA buoy SPTM4 located?
- Sturgeon Point Light, MI (SPTM4) reports from 44.713°N, 83.273°W in Lake Huron (Michigan).
- How often is NOAA buoy SPTM4 updated?
- Station SPTM4 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 SPTM4 measure?
- Big Buoy shows wind, barometric pressure, air and water temperature, and wave height and period where available for Sturgeon Point Light, MI, plus solunar peak windows and a multi-day weather outlook.
- Is Big Buoy free to use?
- Yes. Live data for Sturgeon Point Light, 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.