The St. Lawrence River offers a freshwater diving experience built around historic shipwrecks and drift dives. Sites range from shallow reef dives accessible to most divers through to deep wreck penetrations suited to advanced divers, all reached by boat. Observed species include Round Goby, Rock Bass, Small Mouth Bass, and Walleye. Water warms noticeably through summer, making the months from late spring to early autumn the most rewarding window.
8 operators
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United States
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United States
Fin maps 12 sites in St. Lawrence River (9 scuba diving sites and 4 snorkelling spots, with some suited to both).
9 more sites to explore
Across St. Lawrence River's dive sites, June, July, August and September are most often reported as the best months to visit.
Observation-backed sightings in the St. Lawrence River include Round Goby, Rock Bass, Small Mouth Bass, and Walleye. The Round Goby is recorded as an occasional species across a notable share of sites. These are freshwater species typical of the river environment rather than marine life.
The site mix includes options across different skill levels. The Keystorm wreck is rated for intermediate divers, while the A E Vickery wreck is designated advanced. Some shallower drift and reef sites may suit less experienced divers, but all sites require boat access, which adds a layer of planning for newer divers.
All listed dive sites in the St. Lawrence River are accessed by boat. There are no shore-entry dive sites in the current listing, so divers will need to arrange boat transport to reach the wrecks, drift sites, and reefs. There are currently no operators listed in the region, so independent arrangements will be necessary.
The St. Lawrence River features a mix of wreck dives, drift dives, and reef sites. The Keystorm and A E Vickery are notable shipwrecks spanning a wide depth range from shallow to quite deep. American is a drift dive that holds a consistent shallow depth, making it more manageable for monitoring position during the dive.
