Boat dive — see Entry & access.
R.G. Stewart (shipwreck) is a boat dive site in Wisconsin, United States. Typically most favorable Jul · from 3 years of archive data. Divers commonly see Crayfish. Check the latest conditions and entry details before you go.
Tap a factor for its source and model point
Site hazards: Very cold Lake Superior water · Remote island site far from assistance
All 4 hazards ↓Dive windows this week
Best: MonFavorable windowModerate window— no window
First light 6:04 · Sunrise 6:34 · Sunset 19:21
Source: Open-Meteo wind · graded 2h ago
Forecast only — always assess conditions on site.
Dated firsthand observations from divers — not current conditions.
No diver reports for this site yet. — one dated observation helps every diver after you.
Based on community reviews and site data. Conditions vary — always verify before diving.
What conditions have historically been typical at this site, month by month — not a forecast.
July hastypically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.
Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.
Species noted at this site — not a promise of what you’ll encounter.
No dive shops mapped within 25 km. Know one? Add it to the map.
Data updated July 2026
The R.G. Stewart was a 100-foot packet steamer that ran aground on Michigan Island in fog in June 1899 and burned the next morning when her overworked boilers set the woodwork alight; one crewman drowned. Her hull remains and a scatter of superstructure artifacts lie partially buried in sand over a cobble and boulder bottom in shallow water off the island's southeast shore. The site, listed on the National Register in 1991, makes a relaxed shallow dive or snorkel for boaters exploring the outer Apostle Islands.
Very cold Lake Superior water
Remote island site far from assistance
Cobble/boulder bottom and partially sand-buried wreckage
Open exposure to weather on Michigan Island's southeast shore
R.G. Stewart (shipwreck) is a boat dive — access is by boat rather than from shore. The entry area is recorded as exposed to surge. No facilities are recorded at the site, and cell service is recorded as good. Entry details and parking notes, where known, are listed in the access section of this page.
July-September in calm, stable weather. None official; summer-only in practice. Conditions vary, so check the latest reports and forecasts on the dive site page before your trip.
Divers at R.G. Stewart (shipwreck) in United States commonly report sightings of Crayfish. Crayfish is recorded as common sightings. Marine life varies by season and conditions—check the site page for recent diver observations and photos.
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