Station Name: EAST SUPERIOR -70 NM NE Marquette, MI
Station Type: Other
Data Source: National Data Buoy Center

Elevation Above Sea Level: 0 feet

Nearest Address:
Offshore
Copper Harbor, MI 49918
Keweenaw County

GPS Coordinates: 47.585, -86.585

Nearby Water Temperatures

Extreme Heat Warning issued July 13 at 6:32AM EDT until July 13 at 10:00PM EDT by NWS Marquette MI

Effective: Mon July 13, 2026, 6:32 AM
Expires: Mon July 13, 2026, 8:00 PM

* WHAT...Heat index values from 95 to 102 expected. * WHERE...Portions of central Upper and western Upper Michigan. * WHEN...From noon EDT /11 AM CDT/ today to 10 PM EDT /9 PM CDT/ this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Extreme Heat Warning issued July 13 at 12:39PM EDT until July 14 at 10:00PM EDT by NWS Marquette MI

Effective: Mon July 13, 2026, 12:39 PM
Expires: Tue July 14, 2026, 6:00 AM

* WHAT...Dangerously hot conditions with heat index values from 98 to 105. * WHERE...Portions of central Upper and western Upper Michigan. * WHEN...Until 10 PM EDT /9 PM CDT/ Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Overnight low temperatures will range from 70 to 75 degrees, limiting recovery from heat.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors may reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Small Craft Advisory issued July 13 at 10:39AM EDT until July 14 at 10:00AM EDT by NWS Marquette MI

Effective: Mon July 13, 2026, 10:39 AM
Expires: Mon July 13, 2026, 10:45 PM

* WHAT...West winds 10 to 15 kt with gusts up to 30 kt and waves 1 to 3 ft expected. * WHERE...Manitou Island to Point Isabelle MI and Point Isabelle to Lower Entrance of Portage Canal MI. * WHEN...From 11 PM this evening to 10 AM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.

Small Craft Advisory issued July 13 at 3:28PM EDT until July 14 at 10:00AM EDT by NWS Marquette MI

Effective: Mon July 13, 2026, 3:28 PM
Expires: Tue July 14, 2026, 3:30 AM

* WHAT...West winds 15 to 20 kt with gusts up to 30 kt and waves 1 to 4 ft expected. * WHERE...Manitou Island to Point Isabelle MI and Point Isabelle to Lower Entrance of Portage Canal MI. * WHEN...From 11 PM this evening to 10 AM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.