About Grand Portage Marina and RV Campground
The 27-slip Marina on Grand Portage Bay is located adjacent to Grand Portage Lodge & Casino and is owned and operated by the Grand Portage Band of the Chippewa. The Marina is centrally located on Lake Superior between Thunder Bay, Ontario and Grand Marais, Minnesota within a shallow, protected bay. Open early May through October, the Marina provides services for fishing and boating. Michigan fishing licenses (required if fishing out of Isle Royale), slip rentals, ramp launching, landing facilities, gas and tackle sales are available.
Facilities
Petrol
Toilets
SupermarketCOORDINATES
47.95636 N, -89.69020 E
Port Information
Telephone
Berth Sizes
< 10m
Depth at MLW
< 2m
Manoeuvrability
Fair
Channel Marking
Fair
Port of Entry
No
Overseas Visitor Berths
Yes
Dock Type
Fixed
Style Stern To
Yes
Tidal Flow
Negligible
Active Winter
No
Weather Forecast
Sun
5AM - 9AM
15 March 2026
N 7–9 knots. Gusts up to 20 knots.
−9 to −5°C
NE 0.4-0.8m at 3s period
UV Index: 0 - Low
Cloudy
Sun
9AM - 1PM
15 March 2026
- N 7–11 knots. Gusts up to 22 knots.
- −7 to −4°C
- NE 0.9m at 4s period
- UV Index: 0 - Low
- Cloudy
Sun
1PM - 5PM
15 March 2026
- N 10–12 knots. Gusts up to 22 knots.
- −6 to −4°C
- NE 1.1m at 4s period
- UV Index: 0 - Low
- Chance of showers