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Robert-Bourassa Reservoir

Lake

The Robert‑Bourassa Reservoir forms part of Quebec's La Grande hydroelectric complex in the James Bay region; its remote shoreline draws anglers, canoeists and those studying hydroelectric infrastructure and northern landscapes.

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In this guide

Robert-Bourassa Reservoir essentials

Address: Robert-Bourassa Reservoir area, James Bay region, Québec, Canada
Admission: Free (reservoir / public lands)

About Robert-Bourassa Reservoir

The Robert-Bourassa Reservoir is a large man-made reservoir in northern Quebec, created as part of the James Bay hydroelectric project and associated with the Robert-Bourassa generating complex.

The reservoir is characterized by extensive shorelines, islands and boreal landscape typical of northern Quebec’s hydroelectric reservoirs; it is primarily an industrial and wilderness landscape rather than a developed recreational area. The surrounding region is remote with sparse road access and is used for hydroelectric operations and northern resource activities.

The reservoir was formed during the construction of the Robert-Bourassa hydroelectric project as part of the larger James Bay development in the latter half of the 20th century, which involved damming and diversion on the La Grande River system to supply hydroelectric generating stations.

Situated in the Nord-du-Québec region of northern Quebec, the reservoir lies within the James Bay watershed in a remote boreal and subarctic landscape.

  • Hydroelectric role: Created as part of the James Bay hydroelectric development, it is one of several large reservoirs in northern Quebec used to store water for hydroelectric generating stations.

Tips for Visiting Robert-Bourassa Reservoir

  • The Robert‑Bourassa Reservoir is part of Hydro‑Québec's James Bay complex and lies in a remote northern area - approach logistics from the town of Radisson or via chartered flights, as services are sparse.
  • Treat visits as expedition-style: expect long drives or air transfers, limited facilities, and rapid weather changes; plan your route and accommodations well in advance rather than relying on services near the reservoir.
When to Go

Best Time to Visit Robert-Bourassa Reservoir

Summer is the most practical time for visits when the reservoir and surrounding roads are ice-free; winter brings extreme cold and ice.

Summer (ice-free access)
June-September · 5-20 °C
Warmest months with open water-best for boating, fishing and reaching remote shorelines (access can be limited and remote).
Winter (frozen)
December-March · -30--10 °C
Extended freezing; the reservoir is ice-covered and travel is subject to extreme cold-only suitable for experienced winter travellers with proper planning.
Shoulder seasons
April-May; October-November · -5-10 °C
Transition periods can be unpredictable with freeze/thaw conditions-access may still be limited.

Weather & Climate near Robert-Bourassa Reservoir

Climate

Robert-Bourassa Reservoir's climate is classified as Subarctic (Dry Summer) - Subarctic (Dry Summer) climate with cool summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -26°C to 18°C. Moderate rainfall (694 mm/year).

Air Quality: AQI 15 Good
Temperature & Rainfall
Temperature Range
18°
Warmest Month
-26°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January - -26° - -17° -30° 34 mm - - 3.7 m/s - -
February - -25° - -16° -29° 25 mm - - 3.7 m/s - -
March - -19° - -8° -21° 31 mm - - 3.9 m/s - -
April - -10° - 1° -10° 28 mm - - 4.0 m/s - -
May - -2° - 7° -1° 40 mm - - 4.1 m/s - -
June - 3° - 13° 5° 67 mm - - 4.2 m/s - -
July - 9° - 18° 13° 78 mm - - 3.8 m/s - -
August - 9° - 17° 13° 91 mm - - 4.0 m/s - -
September - 6° - 12° 6° 107 mm - - 4.4 m/s - -
October - 1° - 6° 0° 82 mm - - 4.3 m/s - -
November - -6° - -1° -9° 68 mm - - 4.3 m/s - -
December - -18° - -10° -21° 43 mm - - 3.8 m/s - -