Station Name: GRAND PORTAGE RIVER AT GRAND PORTAGE MN
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 623 feet

Nearest Address:
1 Upper Rd
Grand Portage, MN 55605
Cook County

GPS Coordinates: 47.9634982, -89.6834233

Nearby Water Temperatures

Dense Fog Advisory issued July 13 at 12:55PM CDT until July 13 at 7:00PM CDT by NWS Duluth MN

Effective: Mon July 13, 2026, 12:55 PM
Expires: Tue July 14, 2026, 1:00 AM

* WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than 1 NM. For the Small Craft Advisory, southwest winds 10 to 15 kt with gusts up to 30 kt and waves 1 to 3 ft expected. * WHERE...Grand Portage to Grand Marais MN. * WHEN...For the Dense Fog Advisory, until 7 PM CDT this evening. For the Small Craft Advisory, until 6 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. * ADDITIONAL DETAILS...Occasional gusts near gale force are possible between Grand Portage and Isle Royale late this afternoon into the early evening.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.

Small Craft Advisory issued July 13 at 12:55PM CDT until July 14 at 6:00AM CDT by NWS Duluth MN

Effective: Mon July 13, 2026, 12:55 PM
Expires: Tue July 14, 2026, 1:00 AM

* WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than 1 NM. For the Small Craft Advisory, southwest winds 10 to 15 kt with gusts up to 30 kt and waves 1 to 3 ft expected. * WHERE...Grand Portage to Grand Marais MN. * WHEN...For the Dense Fog Advisory, until 7 PM CDT this evening. For the Small Craft Advisory, until 6 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. * ADDITIONAL DETAILS...Occasional gusts near gale force are possible between Grand Portage and Isle Royale late this afternoon into the early evening.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.

Small Craft Advisory issued July 13 at 3:18PM CDT until July 14 at 6:00AM CDT by NWS Duluth MN

Effective: Mon July 13, 2026, 3:18 PM
Expires: Tue July 14, 2026, 3:30 AM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 30 kt and waves 3 to 6 ft. * WHERE...Grand Portage to Grand Marais MN. * WHEN...Until 6 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. * ADDITIONAL DETAILS...Occasional gusts near gale force are possible between Grand Portage and Isle Royale late this afternoon into the early evening.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.

Small Craft Advisory issued July 13 at 9:17PM CDT until July 14 at 6:00AM CDT by NWS Duluth MN

Effective: Mon July 13, 2026, 9:17 PM
Expires: Tue July 14, 2026, 6:00 AM

* WHAT...Southwest winds 10 to 15 kt with gusts up to 25 kt and waves 2 to 5 ft. * WHERE...Grand Portage to Grand Marais MN. * WHEN...Until 6 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.

Small Craft Advisory issued July 14 at 2:32AM CDT until July 14 at 6:00AM CDT by NWS Duluth MN

Effective: Tue July 14, 2026, 2:32 AM
Expires: Tue July 14, 2026, 6:00 AM

* WHAT...Southwest winds 10 to 15 knots with gusts to 25 knots. Waves 2 to 4 ft. * WHERE...Grand Portage to Grand Marais MN. * WHEN...Until 6 AM CDT early this morning. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.