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Map of Cedarville (wreck)
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Cedarville (wreck)

Michigan, United States
AOW suggestedStrong, variable currents in the Straits of Mackinac; visibility often reduced to 35 ft or less; severe disorientation risk because the 588-ft hull lies on its starboard side rolled past vertical (partly inverted); penetration hazards11–32 m (35–105 ft) depthBoat entry

Boat dive — see Entry & access.

Cedarville (wreck) at a glance

Cedarville (wreck) is an advanced boat dive site in Michigan, United States with depths of 10.7–32 m (35–105 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Round goby, Burbot, and Yellow perch. Check the latest conditions and entry details before you go.

Moderate window now· until 10:00, then favorable & moderate until 19:00 · sunset 18:34

Wind forecast for this hour · 9:00 · run 7 h ago
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Tap a factor for its source and model point

Site hazards: Strong, variable currents in the Straits of Mackinac; visibility often reduced to 35 ft or less; severe disorientation risk because the 588-ft hull lies on its starboard side rolled past vertical (partly inverted); penetration hazards

Read the full hazards ↓

Dive windows this week

Lightest wind: Wed
Mon9:00–10:00 moderate, 10:00–17:00 favorable, 17:00–19:00 moderate

13 kn wind (13 kn wind)

Tue9:00–11:00 favorable, 11:00–14:00 moderate, 14:00–15:00 favorable, 15:00–19:00 moderate

15 kn wind (15 kn wind)

Wed9:00–19:00 favorable

4 kn wind (4 kn wind)

Thu11:00–15:00 moderate, 15:00–19:00 favorable

11 kn wind (11 kn wind)

Fri9:00–10:00 moderate, 10:00–11:00 favorable, 11:00–13:00 moderate, 13:00–19:00 favorable

13 kn wind (13 kn wind)

Sat9:00–19:00 favorable

10 kn wind (10 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 7:40 · Sunrise 8:10 · Sunset 18:34 · some windows run past sunset

Source: Open-Meteo wind · updated 26 Oct, 01:23 GMT-4

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Cedarville (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

Known for: Round goby, Burbot, Zebra/quagga mussel
Best time: June through September; pick slack-current windows and calm weather in the Straits.

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, 63% of days have historically been favorable, wind has typically been 13 knots
  2. February, 58% of days have historically been favorable, wind has typically been 14 knots
  3. March, 60% of days have historically been favorable, wind has typically been 13 knots
  4. April, 50% of days have historically been favorable, wind has typically been 14 knots
  5. May, 87% of days have historically been favorable, wind has typically been 11 knots
  6. June, 79% of days have historically been favorable, wind has typically been 11 knots
  7. July, 91% of days have historically been favorable, wind has typically been 10 knots, historically most favorable
  8. August, 87% of days have historically been favorable, wind has typically been 11 knots
  9. September, 90% of days have historically been favorable, wind has typically been 10 knots
  10. October, 70% of days have historically been favorable, wind has typically been 12 knots
  11. November, 49% of days have historically been favorable, wind has typically been 14 knots
  12. December, 55% 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 Cedarville was a 588-ft self-unloading limestone carrier that sank on May 7, 1965 after colliding in dense fog with the Norwegian freighter Topdalsfjord in the Straits of Mackinac, killing ten of her crew — one of the largest vessels ever lost on the Great Lakes. She lies broken nearly in two on her starboard side, rolled past vertical, in about 105 ft of water east of the Mackinac Bridge, with the shallowest parts of the hull reachable around 35-40 ft and the pilothouse and cabins near 75 ft. Now the marquee dive of the Straits of Mackinac Shipwreck Preserve, she is buoyed each season but demands respect for her size, orientation, current, and variable visibility.

boatwreck

Strong, variable currents in the Straits of Mackinac; visibility often reduced to 35 ft or less; severe disorientation risk because the 588-ft hull lies on its starboard side rolled past vertical (partly inverted); penetration hazards — confined passages, silt, cables — have caused diver fatalities; heavy commercial shipping traffic through the Straits; cold water below the thermocline.

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