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Map of Byron shipwreck
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AdvancedBoat entry

Byron shipwreck

Wisconsin, United States
AOW suggested41 m (135 ft) depthBoat entry

Boat dive — see Entry & access.

Byron shipwreck at a glance

Byron shipwreck is an advanced boat dive site in Wisconsin, United States with depths of up to 41 m (134 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Burbot and Zebra/quagga mussel. Check the latest conditions and entry details before you go.

No window today· next: tomorrow 8:00–14:00 · moderate

Wind forecast for this hour · 23:00 · run 11 h ago
—

Tap a factor for its source and model point

Site hazards: Very cold bottom temperatures (~40°F) · Dark conditions and possible thermoclines · Open-lake boat exposure far offshore

All 5 hazards ↓

Dive windows this week

FriNo window

6 kn wind (6 kn wind)

Sat8:00–14:00 moderate

14 kn wind (14 kn wind)

Sun8:00–18:00 favorable

7 kn wind (7 kn wind)

Mon8:00–10:00 favorable, 10:00–13:00 moderate, 13:00–14:00 favorable, 14:00–15:00 moderate, 15:00–16:00 favorable, 16:00–18:00 moderate

14 kn wind (14 kn wind)

Tue8:00–18:00 favorable

8 kn wind (8 kn wind)

Wed8:00–18:00 favorable

6 kn wind (6 kn wind)

Thu12:00–17:00 moderate, 17:00–18:00 favorable

14 kn wind (14 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 6:45 · Sunrise 7:15 · Sunset 17:54 · some windows run past sunset

Source: Open-Meteo wind · updated 23 Oct, 12:23 GMT-5

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Byron shipwreck

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, settled weather

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, 13% of days have historically been favorable, wind has typically been 20 knots
  2. February, 9% of days have historically been favorable, wind has typically been 20 knots
  3. March, 12% of days have historically been favorable, wind has typically been 20 knots
  4. April, 19% of days have historically been favorable, wind has typically been 19 knots
  5. May, 31% of days have historically been favorable, wind has typically been 16 knots
  6. June, 36% of days have historically been favorable, wind has typically been 16 knots
  7. July, 49% of days have historically been favorable, wind has typically been 14 knots, historically most favorable
  8. August, 37% of days have historically been favorable, wind has typically been 16 knots
  9. September, 38% of days have historically been favorable, wind has typically been 15 knots
  10. October, 8% of days have historically been favorable, wind has typically been 20 knots
  11. November, 8% of days have historically been favorable, wind has typically been 20 knots
  12. December, 9% of days have historically been favorable, wind has typically been 21 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 Byron is an unusually small (35-ft) mid-19th-century schooner lying in 135 ft of water about twelve miles southeast of Sheboygan, within the Wisconsin Shipwreck Coast National Marine Sanctuary. Discovered in 1977 when a commercial fisherman snagged the wreck, it is today almost completely covered by invasive mussels. A deep, dark, cold boat dive for experienced divers.

boatwreck

Depth at the edge of recreational limits (135 ft)

Very cold bottom temperatures (~40°F) — drysuit strongly recommended

Dark conditions and possible thermoclines

Open-lake boat exposure far offshore

Wreck heavily encrusted with zebra/quagga mussels

Reviews

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