NBM Dive Site Resource
Arctic
Michigan Thumb, Michigan, United States
TECHNICAL DIVE REQUIRED FOR THE DEEPER SECTIONS — Arctic is a documented wreck in the Thumb Area Bottomland Preserve’s official inventory, listed at approximately 131 feet.
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Aquatic life at this dive site
What divers may encounter
Three reviewed connections are featured here. Sightings vary by season, conditions, and chance, so they are never guaranteed.
Lake Trout
Salvelinus namaycushMichigan Underwater Preserves places the Thumb-area Arctic in about 131 feet of Lake Huron water. Lake trout use cold offshore habitat, so a passing encounter around the wreck or nearby water column is possible but not assured.
Knepp Timothy, U.S. Fish and Wildlife ServiceOpen Aquatic Life Profile →
Lake Whitefish
Coregonus clupeaformisThe wreck lies in deep Lake Huron water where lake whitefish may use cold bottom habitat. Divers may encounter one close to the wreck or lakebed, with visibility and seasonal movement affecting the chance of a sighting.
Seb951Open Aquatic Life Profile →
Burbot
Lota lotaAt roughly 131 feet, Arctic offers the deep, low-light wreck structure where burbot may shelter or forage. Look near the lower structure and lakebed while treating every encounter as conditional.
USFWS Mountain-PrairieOpen Aquatic Life Profile →
Site media
Photographs
Three views rotate from the published gallery on each visit.
Contributor media
Dive videos
Three featured video positions are reserved on every profile.Published reference location
Location map
The marker shows the public coordinates associated with this profile. Confirm current access, moorings, and departure details before the dive.Map data © OpenStreetMap contributors
Recent field observations
Diver-reported temperatures
Automatically checked observations from dives during the past 14 days. Three reports are visible at a time; scroll for more.A report that passes the automatic checks will appear here with the dive date, diver’s display name, and temperatures at each depth.
Reports are automatically checked for plausible dates, depths, and temperatures. They are observations, not forecasts; confirm conditions before diving.
Seasonal planning reference
Typical monthly conditions
Long-term averages, not a forecast. Actual air and water conditions can change quickly and may vary across the site.Moderate-confidence match — Matched by documented Great Lakes port/area. Air and surface-water values are regional planning averages. No bottom-water line is published because a comparable depth-specific record has not yet been verified.
| Month | Average air | Surface water | Bottom water | Bottom measurement depth |
|---|---|---|---|---|
| Jan | 25.8°F / -3.4°C | 34.1°F / 1.2°C | No reliable record | — |
| Feb | 28.0°F / -2.2°C | 33.8°F / 1.0°C | No reliable record | — |
| Mar | 37.2°F / 2.9°C | 35.9°F / 2.2°C | No reliable record | — |
| Apr | 48.9°F / 9.4°C | 37.0°F / 2.8°C | No reliable record | — |
| May | 60.3°F / 15.7°C | 40.0°F / 4.4°C | No reliable record | — |
| Jun | 69.9°F / 21.1°C | 51.1°F / 10.6°C | No reliable record | — |
| Jul | 74.1°F / 23.4°C | 63.9°F / 17.7°C | No reliable record | — |
| Aug | 72.3°F / 22.4°C | 68.6°F / 20.3°C | No reliable record | — |
| Sep | 64.9°F / 18.3°C | 64.8°F / 18.2°C | No reliable record | — |
| Oct | 53.0°F / 11.7°C | 56.4°F / 13.6°C | No reliable record | — |
| Nov | 41.2°F / 5.1°C | 48.2°F / 9.0°C | No reliable record | — |
| Dec | 31.3°F / -0.4°C | 44.0°F / 6.7°C | No reliable record | — |
NOAA NCEI 1991–2020 U.S. Climate Normals — Detroit Metro, MI
1991–2020 climate normalsReview source ↗NOAA NCEI Coastal Water Temperature Guide — South Huron
Historical monthly station averagesReview source ↗Bottom temperature is never inferred from surface temperature. A blank month means no reliable depth-specific average is available. Data reviewed 2026-08-26.
Why divers know this place
Highlights
Officially documented Thumb Area Bottomland Preserve site.
Regional context
Located within
Before you arrive
Access notes
Primarily boat access; confirm coordinates, mooring status, weather and preserve guidance before departure. Published coordinates support regional discovery and are not a substitute for current navigation, active mooring information, operator guidance, permits, weather, or a dive plan.
Plan within your training
Conditions and hazards
Cold water, open-water conditions, changing visibility, entanglement and overhead/penetration hazards around wreckage. The deepest sections may create decompression obligations; cold water, limited visibility, entanglement and overhead wreckage require site-specific planning.
Independent resource notice
This record is a starting point for independent verification. Access, closures, moorings, weather, currents, depth, visibility, operator availability, and site conditions can change without notice. Confirm current information with the responsible operator, property owner, managing authority, or another qualified local source before planning or attempting a dive.