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Map of SS Cumberland Wreck
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IntermediateBoat entry

SS Cumberland Wreck

Michigan, United States
Open Water suggestedVery cold water (1-3 C below 50 ft)6–24 m (20–80 ft) depthBoat entry

Boat dive — see Entry & access.

SS Cumberland Wreck at a glance

SS Cumberland Wreck is an intermediate boat dive site in Michigan, United States with depths of 6.1–24.4 m (20–80 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.

No window today· next: tomorrow 9:00–19:00 · favorable & moderate

Wind forecast for this hour · 20:00 · run 19 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

All 4 hazards ↓

Dive windows this week

MonNo window

12 kn wind (12 kn wind)

Tue9:00–13:00 favorable, 13:00–19:00 moderate

13 kn wind (13 kn wind)

Wed9:00–11:00 favorable, 11:00–15:00 moderate, 15:00–19:00 favorable

10 kn wind (10 kn wind)

Thu9:00–10:00 favorable, 10:00–12:00 moderate, 12:00–19:00 favorable

12 kn wind (12 kn wind)

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

11 kn wind (11 kn wind)

Sat9:00–15:00 moderate, 18:00–19:00 moderate

17 kn wind (17 kn wind)

Sun9:00–19:00 favorable

12 kn wind (12 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 8:01 · Sunrise 8:33 · Sunset 18:49 · 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 Cumberland 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 — the reef is very exposed.

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, 81% of days have historically been favorable, wind has typically been 11 knots
  2. February, 76% of days have historically been favorable, wind has typically been 11 knots
  3. March, 78% of days have historically been favorable, wind has typically been 11 knots
  4. April, 72% of days have historically been favorable, wind has typically been 11 knots
  5. May, 87% of days have historically been favorable, wind has typically been 10 knots
  6. June, 91% of days have historically been favorable, wind has typically been 9 knots
  7. July, 98% of days have historically been favorable, wind has typically been 9 knots, historically most favorable
  8. August, 96% of days have historically been favorable, wind has typically been 9 knots
  9. September, 93% of days have historically been favorable, wind has typically been 9 knots
  10. October, 82% of days have historically been favorable, wind has typically been 11 knots
  11. November, 74% of days have historically been favorable, wind has typically been 12 knots
  12. December, 65% of days have historically been favorable, wind has typically been 13 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 Cumberland was a wooden side-wheel passenger steamer that grounded on Rock of Ages Reef at Isle Royale's western tip in July 1877 and broke up. Large sections of her wooden hull, her huge side-wheel, and a boiler lie in 20-80 ft, intermingled with wreckage of the steel freighter Henry Chisholm, which struck the same reef 21 years later. The two-wrecks-in-one site is a fascinating archaeology dive at moderate depth, though the reef is fully exposed to Lake Superior weather.

boatreefwreck

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

Extreme remoteness — nearest chambers Minneapolis/Milwaukee

Exposed shoal at the far west end of Isle Royale; swell and fast-changing weather

Confusing intermingled debris fields (Cumberland and Henry Chisholm wreckage overlap)

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