

Best for beginner divers, 2-3m, shore & boat entry, mild current.
Mnjikaning Fish Weirs in Georgian Bay is a unique site where Lake Simcoe meets Lake Couchiching. The site features ancient Indigenous fish weirs, consisting of historic wooden stakes driven into the lakebed. Divers and snorkellers can explore these structures at shallow depths, averaging 2 metres with a maximum of 3 metres. Conditions include mild currents and visibility ranging from 3 to 6 metres. Water temperatures in this region remain cold, typically not exceeding 20°C. Access is available from both shore and boat. Due to the nature of the site, visitors should be aware of potential boat traffic and entanglement hazards near the historic stakes.
44.60410, -79.37320
The weirs are submerged, so look for the tops of the ancient logs.
The site is located in Atherly Narrows, Orillia. Access is via local roads with street parking available or at the nearby Tim Hortons with a purchase.
Expected in this region. No sightings logged here yet.
Depth
Up to 3m
Visibility
3-6m
Skill Level
Beginner
Entry
Shore & Boat
Current
Mild
Typical Dive
30 min
Best Time
Jun, Jul, Aug
Yes, this site is suitable for beginners due to its shallow depth and mild currents.
The depth at this site ranges from 2 to 3 metres, with an average depth of 2 metres.
Yes, snorkelling is permitted at Mnjikaning Fish Weirs and is rated 3 out of 5 for the activity.
Access to the water is available via both shore entry and boat.
Divers and snorkellers should be cautious of boat traffic in the area and the risk of entanglement with the historic stakes.
Diving at Mnjikaning Fish Weirs in Orillia requires the following certifications: Open Water. Always dive within your training limits.
The best months to visit Mnjikaning Fish Weirs in Orillia are June, July, and August. Conditions outside these months can still be good but are less predictable.
Mnjikaning Fish Weirs in Orillia typically has mild currents that most divers can handle comfortably.
Visibility at Mnjikaning Fish Weirs in Orillia typically ranges from 3 metres to 6 metres. Conditions vary with weather, tides, and seasons.