NOAA / GLERL / CoastWatch Great Lakes Node

NOAAPORT - Realtime Great Lakes Weather Data and Marine Observations

This page contains realtime marine data from Great Lakes buoys, coastal met stations, airports, and ships. The data are transmitted through the NOAAPORT system and are received continuously at NOAA/GLERL via satellite dish. Marine obs include wind speed, wind gust, wind direction, air temperature, dew point, cloud cover, sea level pressure, water temperature, wave height, wave period, and live tracking of Great Lakes ship locations.

Most recent observation: Mar-24 00:20 UTC (DOY 083)
This page is updated hourly at approx. 21 minutes past the hour
Click in a lake below to jump to realtime obs for that lake

Note: The map to the left is static and shows all fixed NOAAPORT stations that have reported data over the past two years.

To view live data, click on a lake in the map to jump to realtime data for that lake, or click on a data type or an individual station below to jump to realtime obs for that data type or station.

Utilities:

statistics.txt

Station/Lake Plot

Boxplot by Variable

receiver Signal Strength

Click on a data type or an individual station below to jump to realtime obs for that data type or station

ALL OBSERVATIONS ()
Data only (2026) | Data format | Description of Measurements (NDBC)

Buoys (3)
Data only
45026 45186 45187

CMAN & U.S. Coast Guard Stations (24)
includes GLERL,NDBC,NWS,NOS,USCG Data only
APNM4 ASBO1 BARN6 CBLO1 CHII2 CLSM4 CYGM4 DBLN6 HHLO1 MCYI3 MKGM4 MLWW3 OLCN6 PILM4 PWAW3 ROAM4 RPRN6 SBIO1 SBLM4 SGNW3 STDM4 THLO1 TWCO1 VRMO1

Ship Reports (1)
Data only
WC5932

Surface Airways Stations (0)
Data only

Note: Only stations containing data for current day are listed

Location of all fixed stations active within the past two years:
Buoy (59) | CMAN (97) | Surface Airway (131) | All (287)
Location of fixed stations not currently reporting data:
Buoy (0) | CMAN (0) | Surface Airway (0) | All (0)

Additional Information:

Description of NOAAPort Data Acquisition and Processing
Data format (metadata)
Station file | Station file format
30-day archive of daily NOAAPort files
Archive of annual NOAAPort files
Archive of individual station data available by clicking on station
Historical archive of Buoys and CMAN stations also available at NDBC Great Lakes