San Miguel Island - California
Diving San Miguel Island, you’re often met with some serious surge, so be ready for a bit of a workout. It’s an intermediate spot, mostly because of those conditions, not necessarily the depth, which maxes out around 17 meters. We’ve had some cracking dives exploring the kelp forests here, with garibaldi flashing their bright orange, and the occasional grumpy lingcod peering out from a crevice. It’s not always the clearest water, but when it opens up, the sheer number of rockfish can be impressive.
- Location
- California, United States, North America
- Coordinates
- 34.031900, -120.371200
- Type
- reef
- Maximum Depth
- 17m
- Difficulty
- Intermediate
Marine Protected Area: Harris Point (San Miguel 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 San Miguel 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 San Miguel 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