9099090 - Grand Marais, MN (GDMM5) — Live Marine Conditions & Buoy Data
NOAA station GDMM5, 9099090 - Grand Marais, MN, reports real-time marine conditions from 47.749°N, 90.341°W in Lake Superior (Minnesota). Readings refresh roughly every 10 minutes, and Big Buoy adds a solunar table and a multi-day weather outlook for the area.
Current conditions at 9099090 - Grand Marais, MN
As of October 19, 2026 at 19:30 UTC, 9099090 - Grand Marais, MN (GDMM5) is reporting water temperature 53°F, air temperature 58°F, and barometric pressure 30.43 inHg.
- Water temperature
- 53°F
- Air temperature
- 58°F
- Barometric pressure
- 30.43 inHg
Observed October 19, 2026 at 19:30 UTC from NOAA NDBC station GDMM5. Readings update about every 10 minutes.
What NOAA buoy GDMM5 measures
As a NOAA meteorological station, GDMM5 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 NOAA buoy GDMM5?
- Sea surface temperature at NOAA buoy GDMM5 was 53°F. Measured October 19, 2026 at 19:30 UTC by NOAA station GDMM5 (9099090 - Grand Marais, MN). NDBC measures this near the surface, at a depth that varies by station.
- What is the air temperature at NOAA buoy GDMM5?
- Air temperature at NOAA buoy GDMM5 was 58°F. Measured October 19, 2026 at 19:30 UTC by NOAA station GDMM5 (9099090 - Grand Marais, MN).
- What is the barometric pressure at NOAA buoy GDMM5?
- Sea-level pressure at NOAA buoy GDMM5 was 30.43 inHg (1030.4 hPa). Measured October 19, 2026 at 19:30 UTC by NOAA station GDMM5 (9099090 - Grand Marais, MN). NDBC reports pressure reduced to sea level rather than the raw reading at the station.
- Where is NOAA buoy GDMM5 located?
- 9099090 - Grand Marais, MN (GDMM5) reports from 47.749°N, 90.341°W in Lake Superior (Minnesota).
- How often is NOAA buoy GDMM5 updated?
- Station GDMM5 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 GDMM5 measure?
- Big Buoy shows wind, barometric pressure, air and water temperature, and wave height and period where available for 9099090 - Grand Marais, MN, plus solunar peak windows and a multi-day weather outlook.
- Is Big Buoy free to use?
- Yes. Live data for 9099090 - Grand Marais, MN 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.