Alpena Harbor Light, Alpena, MI (APNM4) — Live Marine Conditions & Buoy Data
NOAA station APNM4, Alpena Harbor Light, Alpena, MI, reports real-time marine conditions from 45.060°N, 83.424°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 — Alpena Harbor Light, Alpena, MI is one of several stations in Lake Huron. See live buoy data and solunar for the whole area.
What NOAA buoy APNM4 measures
Station APNM4 does not report a full meteorological suite; Big Buoy shows the observations available at this location and pairs it with the nearest offshore buoy so you still get a complete picture of the area.
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 APNM4 located?
- Alpena Harbor Light, Alpena, MI (APNM4) reports from 45.060°N, 83.424°W in Lake Huron (Michigan).
- How often is NOAA buoy APNM4 updated?
- Station APNM4 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 APNM4 measure?
- Big Buoy shows the observations available at this location, plus the nearest offshore buoy for Alpena Harbor Light, Alpena, MI, plus solunar peak windows and a multi-day weather outlook.
- Is Big Buoy free to use?
- Yes. Live data for Alpena Harbor Light, Alpena, 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.