Mid Superior (45001) — Live Marine Conditions & Buoy Data
NOAA station 45001, Mid Superior, reports real-time marine conditions from 48.061°N, 87.793°W in Lake Superior. Readings refresh roughly every 10 minutes, and Big Buoy adds a solunar table and a multi-day weather outlook for the area.
Lake Superior Marine Conditions — Mid Superior is one of several stations in Lake Superior. See live buoy data and solunar for the whole area.
Current conditions at Mid Superior
As of October 19, 2026 at 18:50 UTC, Mid Superior (45001) is reporting water temperature 47°F, air temperature 48°F, wave height 1.6 ft at a 5-second dominant period, wind from the WNW at 4 mph gusting 7 mph, and barometric pressure 30.43 inHg.
- Water temperature
- 47°F
- Air temperature
- 48°F
- Wave height
- 1.6 ft @ 5 s
- Wind
- WNW 4 mph (gust 7)
- Barometric pressure
- 30.43 inHg
Observed October 19, 2026 at 18:50 UTC from NOAA NDBC station 45001. Readings update about every 10 minutes.
What NOAA buoy 45001 measures
As a NOAA meteorological station, 45001 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 Superior
Lake Superior is the coldest, deepest, and largest of the Great Lakes, with enough open water and fetch to build true offshore seas. Water stays cold most of the year and storms move through fast, so a sustained blow can raise steep, short-period waves with little warning — read wind, fetch, and sea state together before heading out.
Frequently asked questions
- What is the water temperature at Mid Superior?
- Sea surface temperature at Mid Superior was 47°F. Measured October 19, 2026 at 18:50 UTC by NOAA station 45001 (Mid Superior). NDBC measures this near the surface, at a depth that varies by station.
- What is the air temperature at Mid Superior?
- Air temperature at Mid Superior was 48°F. Measured October 19, 2026 at 18:50 UTC by NOAA station 45001 (Mid Superior).
- What is the wind doing at Mid Superior?
- Wind at Mid Superior was from the WNW at 4 mph, with peak gusts to 7 mph. Measured October 19, 2026 at 18:50 UTC by NOAA station 45001 (Mid Superior). NDBC records wind at the station’s anemometer height, which is not the 10 m height used in marine forecasts.
- How big are the waves at Mid Superior?
- Significant wave height at Mid Superior was 1.6 ft, with a 5-second dominant period. Measured October 19, 2026 at 18:50 UTC by NOAA station 45001 (Mid Superior). Significant wave height is the average of the highest one-third of waves — individual waves can be larger.
- Which direction are the waves coming from at Mid Superior?
- Waves at Mid Superior were arriving from 235° true (SW) at the dominant period. Measured October 19, 2026 at 18:50 UTC by NOAA station 45001 (Mid Superior).
- What is the barometric pressure at Mid Superior?
- Sea-level pressure at Mid Superior was 30.43 inHg (1030.5 hPa). Measured October 19, 2026 at 18:50 UTC by NOAA station 45001 (Mid Superior). NDBC reports pressure reduced to sea level rather than the raw reading at the station.
- What is the swell at Mid Superior?
- The swell at Mid Superior had a significant height of 1.0 ft at a 5-second peak period, arriving from the SW. Measured October 19, 2026 at 18:40 UTC by NOAA station 45001 (Mid Superior). NDBC separates swell from locally generated wind waves using a spectral estimate.
- How much wind chop is at Mid Superior?
- The wind-wave component at Mid Superior had a significant height of 1.0 ft at a 3-second peak period, from the NW. Measured October 19, 2026 at 18:40 UTC by NOAA station 45001 (Mid Superior). Swell and wind-wave heights combine in quadrature, not by addition.
- Where is NOAA buoy 45001 located?
- Mid Superior (45001) reports from 48.061°N, 87.793°W in Lake Superior.
- How often is NOAA buoy 45001 updated?
- Station 45001 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 45001 measure?
- Big Buoy shows wind, barometric pressure, air and water temperature, and wave height and period where available for Mid Superior, plus solunar peak windows and a multi-day weather outlook.
- Is Big Buoy free to use?
- Yes. Live data for Mid Superior 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.