Catalina Island - California
Catalina Island, just a short boat ride from the California coast, offers a pretty accessible dive for those looking to get wet. You'll find yourself cruising through kelp forests, the sunlight dappling down through the fronds, where bright orange garibaldi dart between the stalks. The max depth of 15m makes it a good spot for newer divers or those who just want a relaxed day underwater. We’ve found it’s best when the currents are mild, allowing you to really soak in the peaceful sway of the kelp.
- Location
- California, United States, North America
- Coordinates
- 33.379200, -118.420200
- Maximum Depth
- 15m
- Difficulty
- Beginner
Marine Protected Area: Long Point (Catalina Island) State Marine Reserve
Best Time to Dive in California
The warmest water temperatures in California occur in August, averaging 20.6°C (up to 24.0°C). The coolest conditions are in February at 14.0°C.
The calmest sea conditions are typically in July with average wave heights of 0.60m.
Monthly Water Temperatures
- January: 14.4°C (air: 14.0°C)
- February: 14.0°C (air: 13.8°C)
- March: 14.2°C (air: 13.3°C)
- April: 14.9°C (air: 14.3°C)
- May: 16.6°C (air: 15.4°C)
- June: 18.9°C (air: 17.4°C)
- July: 20.4°C (air: 18.9°C)
- August: 20.6°C (air: 19.6°C)
- September: 20.4°C (air: 19.7°C)
- October: 18.8°C (air: 18.4°C)
- November: 16.3°C (air: 16.0°C)
- December: 15.6°C (air: 14.3°C)
Nearby Dive Sites in California
Nearest Dive Centres to Catalina Island
- Adventure Sports Unlimited - PADI
- Adventure West Scuba - PADI
- Aloha Scuba
- Anderson's SCUBA diving
- Any Water Dive Center - PADI, DAN
- Aquanautics Dive, Inc - ["PADI"]
Marine Life in California
Home to 10 recorded species including 8 reef fish, 1 other, 1 octopus & squid.
Notable Species
- Vernal Pool Fairy Shrimp (Branchinecta lynchi)
- Rainbow Trout (Oncorhynchus mykiss) - Reef Fish
- Western Mosquitofish (Gambusia affinis) - Reef Fish
- Sea Trout (Salmo trutta) - Reef Fish
- Little post horn squid (Spirula spirula) - Octopus & Squid
- Prickly sculpin (Cottus asper) - Reef Fish
- cutthroat trout (Oncorhynchus clarkii) - Reef Fish
- Striped Bass (Morone saxatilis) - Reef Fish
- brook trout (Salvelinus fontinalis) - Reef Fish
- Ribbonfish (Lepidopus caudatus) - Reef Fish
Recommended Packing List for Catalina Island
Based on average water temperature of 17.1°C.
- Wetsuit (5-7mm) - recommended for 17°C water
- Hood & Gloves (3-5mm) - helps retain warmth
- Mask - essential for every dive
- Fins
- BCD - buoyancy compensator
- Regulator - your most safety-critical piece of gear
- Dive Computer - tracks depth, time, and NDL
- Surface Marker Buoy (SMB) - essential for boat pickups
- Dive Torch - useful for crevices and colour at depth
- Underwater Camera - capture your diving memories