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Map of Gallinipper Wreck
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ExpertBoat entry

Gallinipper Wreck

Wisconsin, United States
Technical depth (200-215 ft)61–66 m (200–217 ft) depthBoat entry

Boat dive — see Entry & access.

Gallinipper Wreck at a glance

Gallinipper Wreck is an expert boat dive site in Wisconsin, United States with depths of 61–66 m (200–216 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Burbot. Check the latest conditions and entry details before you go.

Next window today· 8:00–18:00 · favorable & moderate · sunset 17:49

Wind forecast for this hour · 0:00 · run 12 h ago
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Tap a factor for its source and model point

Site hazards: Technical depth (200-215 ft) · Very cold water at depth (~39-42°F) · Dark conditions

All 5 hazards ↓

Dive windows this week

Lightest wind: Sat
Mon8:00–11:00 favorable, 11:00–18:00 moderate

15 kn wind (15 kn wind)

Tue8:00–18:00 favorable

11 kn wind (11 kn wind)

Wed8:00–18:00 favorable

10 kn wind (10 kn wind)

Thu8:00–18:00 favorable

7 kn wind (7 kn wind)

Fri8:00–18:00 favorable

11 kn wind (11 kn wind)

Sat8:00–18:00 favorable

6 kn wind (6 kn wind)

SunNot in the forecast yet

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 6:49 · Sunrise 7:19 · Sunset 17:49 · 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 Gallinipper 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: July-September, settled weather windows

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, 19% of days have historically been favorable, wind has typically been 20 knots
  2. February, 11% of days have historically been favorable, wind has typically been 20 knots
  3. March, 15% of days have historically been favorable, wind has typically been 20 knots
  4. April, 17% of days have historically been favorable, wind has typically been 20 knots
  5. May, 33% of days have historically been favorable, wind has typically been 16 knots
  6. June, 27% of days have historically been favorable, wind has typically been 16 knots
  7. July, 44% of days have historically been favorable, wind has typically been 15 knots, historically most favorable
  8. August, 39% of days have historically been favorable, wind has typically been 16 knots
  9. September, 40% of days have historically been favorable, wind has typically been 15 knots
  10. October, 6% of days have historically been favorable, wind has typically been 20 knots
  11. November, 11% of days have historically been favorable, wind has typically been 20 knots
  12. December, 11% of days have historically been favorable, wind has typically been 20 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 95-ft schooner Gallinipper (built 1833) capsized in a squall on July 7, 1851, and is the oldest shipwreck yet found in Wisconsin waters. It sits upright and remarkably intact in 215 ft of water (deck at ~200 ft) roughly 8-10 nautical miles off the coast between Manitowoc and Sheboygan, with carved bow, bowsprit and both wood-stock anchors in place. A cold, dark trimix dive for experienced technical divers only; listed on the National Register in 2010.

boatwreck

Technical depth (200-215 ft) — trimix decompression dive only

Very cold water at depth (~39-42°F)

Dark conditions

Long offshore boat run; rapidly changing lake weather

Fragile 1833-built structure — no contact

Reviews

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