Aggi ranges from 6 to 21 metres deep (20–69 feet). 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 Aggi a shore dive or a boat dive?

Aggi is a boat dive — access is by boat rather than from shore. The entry area is recorded as exposed to surge. 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 Aggi?

Aggi is rated as intermediate difficulty, which may not suit new divers. Listed depths run from 6 to 21 metres (20–69 feet). Access is by boat. Consider your experience level, conditions, and local guidance before planning.

What will I see at Aggi?

Divers at Aggi in United States commonly report sightings of kelp forest fish. Kelp forest fish is recorded as common sightings. Marine life varies by season and conditions—check the site page for recent diver observations and photos.

Add the first photo

IntermediateBoat entry

Aggi

California, United States

Open Water suggested6–21 m (20–69 ft) depthBoat entry5mm wetsuit typical

Boat dive — see Entry & access.

Aggi at a glance

Aggi is an intermediate boat dive site in California, United States with depths of 6–21 m (20–69 ft). Typically most favorable Sep · from 3 years of archive data. Divers commonly see kelp forest fish. Recent reports put the water around 21°C (69°F). Check the latest conditions and entry details before you go.

Next window today· 8:00–19:00 · favorable · sunset 18:14

Forecast for this hour · 3:00 · run 4 h ago

1.1 m (3.5 ft)waves — about a meter expected (waves — about four feet expected)

Tap a factor for its source and model point · Forecast 21°C · seasonal avg 18°C ( · Forecast 69°F · seasonal avg 64°F)

Site hazards: Remote Channel Islands boat logistics, cold water, swell/surge around Santa Rosa Island, kelp, possible current, low visibility, and protected cultural resource restrictions.

Read the full hazards ↓

Dive windows this week

Smallest waves: Sat

Mon

1.3 m waves · 13 kn wind (4.2 ft waves · 13 kn wind)

Tue

1.8 m waves · 17 kn wind (5.9 ft waves · 17 kn wind)

Wed

1.5 m waves · 2 kn wind (4.8 ft waves · 2 kn wind)

Thu

1.2 m waves · 4 kn wind (3.9 ft waves · 4 kn wind)

Fri

1.2 m waves · 5 kn wind (3.8 ft waves · 5 kn wind)

Sat

1.1 m waves · 3 kn wind (3.5 ft waves · 3 kn wind)

Sun

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wave and wind forecasts. Numbers under each bar are daylight averages.

First light 6:49 · Sunrise 7:15 · Sunset 18:14 · some windows run past sunset

Source: Open-Meteo marine · model point 3.3 km from site · updated 25 Oct, 22:19 GMT-7

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Aggi

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?

What Divers Say

Best time: Late summer through winter is commonly favored for Channel Islands visibility, but the site should be selected only when swell and wind are suitable.

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.

January, 13% of days have historically been favorable, water has typically been 14°C (57°F), waves have typically been 2.4 m (7.9 ft), wind has typically been 15 knots
February, 16% of days have historically been favorable, water has typically been 14°C (56°F), waves have typically been 2.4 m (7.9 ft), wind has typically been 15 knots
March, 18% of days have historically been favorable, water has typically been 13°C (55°F), waves have typically been 2.4 m (7.7 ft), wind has typically been 16 knots
April, 32% of days have historically been favorable, water has typically been 13°C (55°F), waves have typically been 2.0 m (6.5 ft), wind has typically been 16 knots
May, 26% of days have historically been favorable, water has typically been 14°C (57°F), waves have typically been 1.9 m (6.1 ft), wind has typically been 16 knots
June, 34% of days have historically been favorable, water has typically been 15°C (59°F), waves have typically been 1.8 m (5.9 ft), wind has typically been 15 knots
July, 55% of days have historically been favorable, water has typically been 17°C (62°F), waves have typically been 1.6 m (5.1 ft), wind has typically been 14 knots
August, 48% of days have historically been favorable, water has typically been 18°C (65°F), waves have typically been 1.6 m (5.2 ft), wind has typically been 14 knots
September, 57% of days have historically been favorable, water has typically been 19°C (66°F), waves have typically been 1.6 m (5.1 ft), wind has typically been 13 knots, historically most favorable
October, 38% of days have historically been favorable, water has typically been 18°C (64°F), waves have typically been 1.8 m (6.0 ft), wind has typically been 14 knots
November, 28% of days have historically been favorable, water has typically been 16°C (61°F), waves have typically been 2.0 m (6.5 ft), wind has typically been 12 knots
December, 28% of days have historically been favorable, water has typically been 16°C (60°F), waves have typically been 2.2 m (7.3 ft), wind has typically been 13 knots

September 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.

kelp forest fishCommonly seen

Fills & rentals nearby

No dive shops mapped within 25 km (16 mi). Know one? Add it to the map.

Data updated July 2026

Site details

Historic three-masted steel sailing ship wrecked on Talcott Shoal off Santa Rosa Island. NOAA and NPS materials document underwater wreck imagery, making this a legitimate Channel Islands boat-wreck target for experienced cold-water divers. Expect scattered wreckage integrated with reef/kelp habitat rather than a complete ship.

boatwreck

Remote Channel Islands boat logistics, cold water, swell/surge around Santa Rosa Island, kelp, possible current, low visibility, and protected cultural resource restrictions.

Reviews

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