Grand Portage
Lake Superior: Upper Peninsula (Ontonagon, Keweenaw, Marquette, Munising, Whitefish Bay) · USA
Plan route from Grand PortageShow on map
Grand Portage is a harbour in the Lake Superior: Upper Peninsula (Ontonagon, Keweenaw, Marquette, Munising, Whitefish Bay) cruising area, USA. The water depth in the harbour is about 0.4 m. Facilities on site: Slipway, Restaurant, Groceries. The nearest harbour by water is Grand Marais Municipal Marina (30.8 nm). With Sailseer you can plan passages from here with weather from nine models, tides, currents and bridge times.
Harbour info
Water depth: Harbour 0.4 m
Depth source: EMODnet (estimate)
Location: 47° 57,38' N 089° 41,39' W
From OpenStreetMap (way/1475018150). Operator: Grand Portage Lodge & Casino. Depth 0.4 m estimated off the entrance from the EMODnet model, not guaranteed. No name in OpenStreetMap, named after the nearest town.
Facilities
SlipwayRestaurantGroceries
10-day outlook
| Day | Wind kn | Gusts kn | from | Waves | Weather | |
|---|---|---|---|---|---|---|
| loading … | ||||||
Strongest wind and gust per day, mean of ECMWF and GFS; from day six only a trend. Hourly forecast, models and warnings on the map
Nearest harbours by water
- Grand Marais Municipal Marina 30.8 nm SW · Plan route
- Thunder Bay (Lake Superior: Ontario (Thunder Bay, Nipigon, Rossport, Marathon, Batchawana Bay)) 38 nm NE · Plan route
- Thunder Bay (Lake Superior: Ontario (Thunder Bay, Nipigon, Rossport, Marathon, Batchawana Bay)) 40.5 nm NE · Plan route
- Silver Islet Marina 43 nm NE · Plan route
- Rock Harbor Marina 59.3 nm E · Plan route
Harbour guides and charts
- OpenSeaMap Chart with buoys, lights and harbour details
- OpenStreetMap Map with paths, shops and addresses ashore
- Google Maps Satellite view, Street View, opening hours ashore
- Windy Webcams Webcams nearby
- Navily Photos, reviews, prices and berth booking
- noforeignland Anchorages, services and reports from cruising sailors
Rules and formalities
Frequently asked questions
How deep is the water at Grand Portage?
The water depth in the harbour is about 0.4 m. Source of the depth: EMODnet (estimate). Always rely on the chart and the echo sounder.
What facilities does Grand Portage have?
Facilities on site: Slipway, Restaurant, Groceries.
Which harbours are near Grand Portage?
By water: Grand Marais Municipal Marina (30.8 nm), Thunder Bay (Lake Superior: Ontario (Thunder Bay, Nipigon, Rossport, Marathon, Batchawana Bay)) (38 nm), Thunder Bay (Lake Superior: Ontario (Thunder Bay, Nipigon, Rossport, Marathon, Batchawana Bay)) (40.5 nm), Silver Islet Marina (43 nm), Rock Harbor Marina (59.3 nm).
What is the weather like in Grand Portage?
For Grand Portage, Sailseer shows the 10-day outlook from ECMWF and GFS and, on the map, the hourly forecast from nine models with official warnings and measured wind.
Sources: OpenStreetMap way/1475018150, OpenStreetMap (harbour services) (as of 2026-10-21) Location and facilities partly from OpenStreetMap (© OpenStreetMap contributors, ODbL).