United States
Isle Royale National Park
About this Dive Site
Description
Isle Royale National Park in Lake Superior is a diver's paradise, boasting a remarkable collection of shipwrecks, intriguing underwater geological formations, and a rich diversity of marine life. Among its notable sites is the Chester Congdon, a grand 532-foot steamship that sank in 1918, offering a significant historical dive experience.
Best Time to Dive
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3°C | 3°C | 4°C | 5°C | 8°C | 12°C | 16°C | 18°C | 16°C | 12°C | 9°C | 5°C |
Peak Season
September, October
Jan
Ice diving possible, very cold
Feb
Ice diving conditions
Mar
Ice breaking up, still very cold
Apr
Ice melts, water very cold
More monthly highlights
May
Water warming, visibility improving
Jun
Good visibility, exploring shipwrecks
Jul
Pleasant water temperatures, excellent wreck diving
Aug
Peak summer, best wreck diving conditions
Sep
Clearer water, fall colors starting
Oct
Excellent visibility, dramatic shipwreck exploration
Nov
Water cooling, visibility decreasing
Dec
Water freezing over, limited diving
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