About the Buoy



Your interest in our buoys has not gone unnoticed!

Your phone calls, emails, and interactions through Twitter and Facebook, have reassured us that the buoys are valued and needed. We are very proud to be able to offer the services of two buoys — one located in the waters north of Michigan City, Indiana and the other near Wilmette Harbor, Illinois. Our goal is to provide real-time data for a variety of uses — charter fishing, recreational boating, weather forecasting — to name a few.

Putting a buoy in the water, year after year, requires many things to happen: the right weather conditions, the right equipment (buoy, boat, trailer), the right people (IISG specialists, volunteers), and the right technical services (website, data modem). It wouldn’t be possible without sufficient funding to keep the buoys afloat.

Please consider making a donation.

By providing any amount — big or small — we can keep the buoys in working order and get them safely deployed and provide data in the same timely manner that you have come to rely on.

CLICK TO DONATE BY CREDIT CARD (you will be forwarded to a University of Illinois Extension donation page)

DONATE BY CHECK – please mail to Lisa Merrifield, Illinois-Indiana Sea Grant, 374 National Soybean Research Center, 1101 W Peabody Dr, Urbana, IL 61801. Include your mailing address for a tax-deductible receipt.

If you are interested making a large donation or exploring a possible partnership, please contact us at 765-496-3722 or email amcbride@purdue.edu. We would love to hear from you!

Long Term Data Uses

develope prediction models

fill the gaps in water quality data

provides a picture of historic data

Information Recorded

  • Air Temperature
  • Water Temperature
  • Relative Humidity
  • Dew Point
  • Wave Height
  • Wave Direction
  • Wave Period
  • Wind Speed
  • Wind Gust
  • Wind Direction
  • Atmospheric Pressure
  • Solar Radiation

Air Temperature: degrees F – averaged over ten minutes

Owned by
Illinois Indiana Sea Grant and Purdue University Civil Engineering


Located four miles off Michigan City

(N41.75532, W86.96847)

The buoy is located in about 62’ of water. Attached to a ton-weight concrete anchor, the 500-lb buoy can be seen with 7’ above the surface and 8’ below. The buoy is outfitted with a flashing beacon light as required by law.