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Map of SS Algoma Wreck
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IntermediateBoat entry

SS Algoma Wreck

Michigan, United States
Open Water suggestedVery cold water (1-3 C below 50 ft)5–31 m (15–100 ft) depthBoat entry

Boat dive — see Entry & access.

SS Algoma Wreck at a glance

SS Algoma Wreck is an intermediate boat dive site in Michigan, United States with depths of 4.6–30.5 m (15–100 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Lake trout and Burbot. Check the latest conditions and entry details before you go.

Favorable window now· until 19:00 · sunset 18:45

Wind forecast for this hour · 11:00 · run 10 h ago
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Tap a factor for its source and model point

Site hazards: Very cold water (1-3 C below 50 ft) · Extreme remoteness · Sharp, scattered steel plating and wreckage

All 4 hazards ↓

Dive windows this week

Mon9:00–19:00 favorable

9 kn wind (9 kn wind)

Tue9:00–14:00 favorable, 14:00–18:00 moderate

12 kn wind (12 kn wind)

Wed9:00–10:00 favorable, 10:00–14:00 moderate, 14:00–19:00 favorable

9 kn wind (9 kn wind)

Thu9:00–16:00 moderate, 16:00–19:00 favorable

12 kn wind (12 kn wind)

Fri9:00–10:00 moderate, 10:00–19:00 favorable

12 kn wind (12 kn wind)

Sat9:00–19:00 moderate

13 kn wind (13 kn wind)

Sun9:00–19:00 favorable

9 kn wind (9 kn wind)

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wind forecasts. Numbers under each bar are daylight averages.

First light 7:58 · Sunrise 8:30 · Sunset 18:45 · some windows run past sunset

Source: Open-Meteo wind · updated 26 Oct, 01:28 GMT-4

Forecast only — always assess conditions on site.

Compare this weekend’s windows near SS Algoma Wreck

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

What Divers Say

Best time: June-September on calm days.

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. January, 40% of days have historically been favorable, wind has typically been 15 knots
  2. February, 40% of days have historically been favorable, wind has typically been 15 knots
  3. March, 49% of days have historically been favorable, wind has typically been 14 knots
  4. April, 44% of days have historically been favorable, wind has typically been 15 knots
  5. May, 59% of days have historically been favorable, wind has typically been 13 knots
  6. June, 72% of days have historically been favorable, wind has typically been 12 knots
  7. July, 86% of days have historically been favorable, wind has typically been 10 knots, historically most favorable
  8. August, 76% of days have historically been favorable, wind has typically been 12 knots
  9. September, 70% of days have historically been favorable, wind has typically been 12 knots
  10. October, 43% of days have historically been favorable, wind has typically been 15 knots
  11. November, 32% of days have historically been favorable, wind has typically been 16 knots
  12. December, 45% of days have historically been favorable, wind has typically been 16 knots

July has typically 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.

Marine life seen at this site

Species noted at this site — not a promise of what you’ll encounter.

Species seen here

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

Fills & rentals nearby

No dive shops mapped within 25 km (16 mi). Know one? Add it to the map.

Data updated June 2026

Site details

The Algoma was a steel passenger steamer that broke apart on the rocks of Isle Royale's southeast shore in a November 1885 storm, killing around 46 people — the worst loss of life in Lake Superior history. The ship broke in half during salvage-era storms and today only scattered stern wreckage, plating, and machinery remain, spread down the rocky slope near Mott Island. It is the shallowest and most broken of Isle Royale's major wrecks, divable at moderate depths but in a very exposed location.

boatwreck

Very cold water (1-3 C below 50 ft)

Extreme remoteness — nearest chambers in Minneapolis/Milwaukee

Exposed location on Isle Royale's southeast shore; swell and rapidly changing weather

Sharp, scattered steel plating and wreckage

Reviews

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