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Map of Frank O'Connor Wreck
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IntermediateBoat entry

Frank O'Connor Wreck

Wisconsin, United States
Open Water suggestedCold fresh water and thermoclines13–20 m (43–65 ft) depthBoat entry

Boat dive — see Entry & access.

Frank O'Connor Wreck at a glance

Frank O'Connor Wreck is an intermediate boat dive site in Wisconsin, United States with depths of 13–19.8 m (43–65 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Burbot and Round goby. Check the latest conditions and entry details before you go.

No window today· next: tomorrow 8:00–10:00 · moderate

Wind forecast for this hour · 23:00 · run 10 h ago
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Tap a factor for its source and model point

Site hazards: Cold fresh water and thermoclines · Open Lake Michigan exposure ~2.6 miles offshore · Large machinery and debris

All 3 hazards ↓

Dive windows this week

SunNo window

8 kn wind (8 kn wind)

Mon8:00–10:00 moderate, 11:00–14:00 moderate, 14:00–16:00 favorable, 16:00–18:00 moderate

15 kn wind (15 kn wind)

Tue8:00–18:00 favorable

9 kn wind (9 kn wind)

Wed10:00–12:00 moderate, 12:00–13:00 favorable, 13:00–18:00 moderate

14 kn wind (14 kn wind)

Thu8:00–9:00 moderate, 9:00–18:00 favorable

7 kn wind (7 kn wind)

Fri8:00–18:00 favorable

8 kn wind (8 kn wind)

Sat8:00–18:00 favorable

7 kn wind (7 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 6:47 · Sunrise 7:17 · Sunset 17:46 · some windows run past sunset

Source: Open-Meteo wind · updated 25 Oct, 12:22 GMT-5

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Frank O'Connor 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?

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, 57% of days have historically been favorable, wind has typically been 13 knots
  2. February, 52% of days have historically been favorable, wind has typically been 14 knots
  3. March, 43% 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 14 knots
  5. May, 74% of days have historically been favorable, wind has typically been 12 knots
  6. June, 71% 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, 85% of days have historically been favorable, wind has typically been 11 knots
  9. September, 83% of days have historically been favorable, wind has typically been 11 knots
  10. October, 59% of days have historically been favorable, wind has typically been 14 knots
  11. November, 50% of days have historically been favorable, wind has typically been 14 knots
  12. December, 56% of days have historically been favorable, wind has typically been 14 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 301-ft wooden bulk carrier Frank O'Connor caught fire and sank on October 3, 1919, while carrying 3,000 tons of coal, settling in 65 ft of water about 2.6 miles north-northeast of Cana Island. Its museum-quality triple-expansion steam engine and boilers rise more than 20 ft off the bottom, making it one of Door County's signature wreck dives. Two WHS seasonal mooring buoys mark the bow and engine.

boatwreck

Cold fresh water and thermoclines

Open Lake Michigan exposure ~2.6 miles offshore

Large machinery and debris — entanglement/snag points

Reviews

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