Conditions
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
Dived here today? How were conditions vs. what we showed?
About this site
Main Duck Island sits in eastern Lake Ontario, north of the New York shoreline and southwest of Kingston, within the freshwater expanse known for scattered shipwrecks tied to historic shipping routes through the Thousand Islands region. The waters around the island are exposed and remote, reachable mainly by boat from ports along the Ontario or New York shores.
AI overviewDurable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
No notes yet. Dived here? Be the first to leave a tip.
Share a write-up or a photo. Submissions are reviewed before they appear on the page.
Nearby dive sites
Shops that dive here
No shops have listed this site yet.