How deep is Brother Jonathan Wreck?

Brother Jonathan Wreck has a depth range of up to 84 metres (276 feet). Check the dive site page for current conditions and any depth-specific guidance before planning your dive.

Can beginners dive Brother Jonathan Wreck?

Brother Jonathan Wreck is rated as intermediate difficulty, which may not suit new divers. A Technical/expedition only — roughly 84 m requires advanced trimix or CCR qualification at minimum; the site was historically worked by submersibles, not visiting divers, and has no recreational access. certification or equivalent is suggested. Consider your experience level, conditions, and local guidance before planning.

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IntermediateBoat entry

Brother Jonathan Wreck

California, United States

Depth of about 84 m, far beyond recreational limits; frigid Northern California water; the area is exposed to severe storms84 m depthBoat entry7mm or semi-dry + hood typical

Boat dive — see Entry & access.

Brother Jonathan Wreck at a glance

Brother Jonathan Wreck is a intermediate boat dive site in California, United States with depths of up to 84 m (276 ft). Typically most favorable Aug · from 3 years of archive data. Recent reports put the water around 15°C (59°F). Check the latest conditions and entry details before you go.

Marine model · graded 4h ago

1.2 mwaves — about a meter expected

Tap a factor for its source and model point · Forecast 15°C · seasonal avg 11°C

Site hazards: Depth of about 84 m, far beyond recreational limits; frigid Northern California water; the area is exposed to severe storms

Read the full hazards ↓

Dive windows this week

Best: Sun

Sun7:00–21:00

Mon7:00–21:00

Tue7:00–21:00

Wed7:00–21:00

Thu7:00–21:00

Fri7:00–21:00

Sat—

Favorable windowModerate window— no window

First light 5:34 · Sunrise 6:06 · Sunset 20:41

Source: Open-Meteo marine · model point 5.0 km from site · graded 4h ago

Forecast only — always assess conditions on site.

Forecast · NOAA tide model

Tide & slack timing

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.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

Jan3%12°C3.7 m
Feb1%11°C3.6 m
Mar1%10°C3.4 m
Apr2%10°C2.8 m
May4%10°C2.4 m
Jun8%10°C2.5 m
Jul13%11°C2.2 m
Aug20%12°C1.9 m
Sep12%13°C2.4 m
Oct5%12°C2.9 m
Nov2%13°C3.4 m
Dec2%13°C3.5 m

August hastypically 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 recorded at this site

No recorded sightings data for this site yet. Species lists appear as GBIF records and diver reports accumulate.

Fills & rentals nearby

No dive shops mapped within 25 km. Know one? Add it to the map.

Site details

paddle steamer

wreck

Depth of about 84 m, far beyond recreational limits; frigid Northern California water; the area is exposed to severe storms — the ship itself was lost in a fierce northwesterly gale; darkness at depth and a remote offshore location compound the risk. The wreck is a state-owned, government-protected historic site on the National Register, and salvage operations have ended.

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