About Revisions Harsens Island, MI Harsens Island, MI Max Depth: 31-35ft/9-11m Average Viz: 11-15ft/3-5m Entry Type: Shore Bottom Composition: Sandy Clay Aquatic Life: Plenty To See Spring: 56-60°F/13-16°C Summer: 66-70°F/19-21°C Fall: 56-60°F/13-16°C Winter: Under 50°F/10°C 2/12/2012 11:01 PM

River Dive! Be Careful near the channel, it is active with large deep commercial vessels (ships). You should be able to hear the ships long before they get near you. This gives you plenty of time to get near the shore and out of harms way. Summer there is small boat water craft, be sure to use a dive flag. Awesome winter diving.