Oak St., Chicago, IL (OKSI2) — Live Marine Conditions & Buoy Data
NOAA station OKSI2, Oak St., Chicago, IL, reports real-time marine conditions from 41.912°N, 87.624°W in Lake Michigan (Illinois). Readings refresh roughly every 10 minutes, and Big Buoy adds a solunar table and a multi-day weather outlook for the area.
What NOAA buoy OKSI2 measures
Station OKSI2 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 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
- Where is NOAA buoy OKSI2 located?
- Oak St., Chicago, IL (OKSI2) reports from 41.912°N, 87.624°W in Lake Michigan (Illinois).
- How often is NOAA buoy OKSI2 updated?
- Station OKSI2 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 OKSI2 measure?
- Big Buoy shows the observations available at this location, plus the nearest offshore buoy for Oak St., Chicago, IL, plus solunar peak windows and a multi-day weather outlook.
- Is Big Buoy free to use?
- Yes. Live data for Oak St., Chicago, IL 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.