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Map of SS Robert Wallace Wreck
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IntermediateBoat entry

SS Robert Wallace Wreck

Minnesota, United States
Extreme depth (240 ft / 73 m) requiring trimix and staged decompression, well beyond recreational limits; cold, dark Lake Superior water with poor visibility reported at the site; wreck lies near commercial shipping lanes; long offshore boat run exposed to Lake Superior weather; the hull is cracked/separated, so treat any penetration as an overhead hazard. Protected historic site (NRHP 2009)73 m (240 ft) depthBoat entry

Boat dive — see Entry & access.

SS Robert Wallace Wreck at a glance

SS Robert Wallace Wreck is an intermediate boat dive site in Minnesota, United States with depths of up to 73 m (239 ft). Typically most favorable Jul · from 3 years of archive data. Check the latest conditions and entry details before you go.

Moderate window now· until 18:00

Wind forecast for this hour · 16:00 · run 3 h ago
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Tap a factor for its source and model point

Site hazards: Extreme depth (240 ft / 73 m) requiring trimix and staged decompression, well beyond recreational limits; cold, dark Lake Superior water with poor visibility reported at the site; wreck lies near commercial shipping lanes; long offshore boat run exposed to Lake Superior weather; the hull is cracked/separated, so treat any penetration as an overhead hazard. Protected historic site (NRHP 2009)

Read the full hazards ↓

Dive windows this week

Sat14:00–18:00 moderate

8 kn wind (8 kn wind)

Sun8:00–19:00 favorable

9 kn wind (9 kn wind)

Mon8:00–18:00 favorable

10 kn wind (10 kn wind)

Tue8:00–13:00 moderate, 13:00–18:00 favorable

13 kn wind (13 kn wind)

Wed8:00–10:00 moderate

10 kn wind (10 kn wind)

Thu8:00–18:00 favorable

8 kn wind (8 kn wind)

Fri8:00–16:00 favorable, 16:00–18:00 moderate

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 7:06 · Sunrise 7:38 · Sunset 18:04 · some windows run past sunset

Source: Open-Meteo wind · updated 24 Oct, 12:20 GMT-5

Forecast only — always assess conditions on site.

Compare this weekend’s windows near SS Robert Wallace Wreck

Forecast · NOAA tide model

Tide & slack timing

Loading tide predictions

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?

Best months, historically

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

  1. January, 22% of days have historically been favorable, wind has typically been 18 knots
  2. February, 22% of days have historically been favorable, wind has typically been 18 knots
  3. March, 17% of days have historically been favorable, wind has typically been 19 knots
  4. April, 19% of days have historically been favorable, wind has typically been 19 knots
  5. May, 19% of days have historically been favorable, wind has typically been 18 knots
  6. June, 32% of days have historically been favorable, wind has typically been 15 knots
  7. July, 60% of days have historically been favorable, wind has typically been 14 knots, historically most favorable
  8. August, 51% of days have historically been favorable, wind has typically been 14 knots
  9. September, 38% of days have historically been favorable, wind has typically been 15 knots
  10. October, 29% of days have historically been favorable, wind has typically been 17 knots
  11. November, 23% of days have historically been favorable, wind has typically been 18 knots
  12. December, 24% of days have historically been favorable, wind has typically been 19 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 recorded at this site

No recorded sightings data for this site yet. Species lists appear as GBIF records and diver reports accumulate.

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

wooden steamship wrecked in Lake Superior in 1902

wreck

Extreme depth (240 ft / 73 m) requiring trimix and staged decompression, well beyond recreational limits; cold, dark Lake Superior water with poor visibility reported at the site; wreck lies near commercial shipping lanes; long offshore boat run exposed to Lake Superior weather; the hull is cracked/separated, so treat any penetration as an overhead hazard. Protected historic site (NRHP 2009) — artifact removal prohibited by Minnesota law.

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