How deep is Brother Jonathan Wreck?

Brother Jonathan Wreck reaches a maximum depth of 84 metres (276 feet) — a deep dive at its limit. It is a saltwater site rated as intermediate difficulty. Depths vary across the site, so plan your profile to your training and verify conditions locally.

Is Brother Jonathan Wreck a shore dive or a boat dive?

Brother Jonathan Wreck is a boat dive — access is by boat rather than from shore. No facilities are recorded at the site, and cell service is recorded as good. Entry details and parking notes, where known, are listed in the access section of this page.

Can beginners dive Brother Jonathan Wreck?

Brother Jonathan Wreck is rated as intermediate difficulty, which may not suit new divers. Listed maximum depth is 84 metres (276 feet). Access is by boat. Consider your experience level, conditions, and local guidance before planning.

Add the first photo

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 an 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 14°C (58°F). Check the latest conditions and entry details before you go.

Marine model · graded 2h ago

1.5 mwaves — about a meter and a half expected

Tap a factor for its source and model point · Forecast 14°C · seasonal avg 13°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: Wed

Fri11:00–20:00

Sat7:00–14:00

Sun7:00–20:00

Mon7:00–13:00

Tue7:00–12:00

Wed7:00–20:00

Thu8:00–20:00

Favorable windowModerate window— no window

First light 6:25 · Sunrise 6:53 · Sunset 19:33

Source: Open-Meteo marine · model point 5.0 km from site · graded 2h 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.

Dived here today — did the forecast match?

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.

Data updated June 2026

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.

Reviews

No reviews yet — this site is waiting for its first. Dived here? Your rating and a few lines help the next diver.

Spot something off?

Help keep this listing accurate for the next diver.