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Explore California

California offers divers a unique underwater experience, celebrated for its stunning cold-water diving opportunities. The state is renowned for its spectacular kelp forests, where sunlight streams through the swaying kelp, creating an ethereal, otherworldly atmosphere. These majestic underwater forests are home to an incredible array of marine life, including the playful sea lions, colorful nudibranchs, and the occasional majestic whale. Divers can explore a variety of environments, from vibrant reefs teeming with life to the eerie allure of Wreck Alley. Shore diving in Southern California is particularly popular, with easy access to diverse underwater landscapes. Meanwhile, boat dives and multi-day liveaboard trips offer the chance to discover more remote locations such as the Channel Islands and Catalina Island. Each site presents its own unique charm, whether it's the bustling marine reserves or the historic shipwrecks. Seasonal temperature variations mean divers should be prepared with appropriate gear, like a thick wetsuit or drysuit, especially during cooler months. Whether you're a seasoned diver or a curious beginner, California's dive sites promise a memorable adventure filled with diverse marine encounters and breathtaking natural beauty.

Top Regions to Explore

Upcoming Events

Open Water Diver Course

Open Water Diver Course

Our SSI Open Water Diver Course is designed to be fun, supportive, and confidence-building, giving you everything you need to safely explore the underwater world.A $50 deposit secures your spot, and classes are kept small—so reserving early is the best way to guarantee your place.Your Course ScheduleClassroom (6:00 – 8:30 p.m.) August 18,20,25,& 27Pool Sessions (9:00 a.m. – 2:00 p.m.): August 22 & 23Ocean Training – Ocean Monterey August 29 & 30Complete your certification with an unforgettable weekend that includes:4 open water dives1 snorkel divePlus, you’ll receive a FREE Dive Computer Class (a $125 value) to help you dive with confidence.Course PricingCourse Fee: $398 (Includes classroom instruction, pool sessions, and instructor-led open water dives)Personal Gear Package (required): $289 – $499 (Mask, snorkel, fins, boots, gloves & cutting devices)Plus mouthpieces for regulators. ➤ Receive a $100 rebate when gear is purchased through High Sierra Divers.Digital Learning Materials: $159.99 Normally $180.99 (SSI digital book, dive tables, certification card, and logbook)Rental Gear for Open Water Dives: Special rental rate when you purchase your basic gear for HSD.We provide all scuba gear for pool sessions, and rental gear is available for your ocean dives.Why Choose Us?✔ Small class sizes for personalized instruction ✔ Experienced, professional instructors ✔ Focus on safety, confidence, and enjoyment ✔ Ongoing support—even after certificationAdditional InformationMinimum age: 12 years and olderCourse duration: Approximately 2 weeksSmall group instruction focused on safety and confidenceReady to Get Started?Create your SSI Diver profile and connect with us here: https://www.divessi.com/en/homeOr simply reply to this email, call, or stop by the shop—we’ll take care of the rest.This is more than just a class—it’s the beginning of a lifetime of adventure. Don’t wait too long… spots fill quickly, and we’d love to see you in this upcoming session!Best regards, Doug & Tina

High Sierra Divers, 217 Palm Ave, 95603, Auburn, CA, USA
August 18, 2026 +7 More
$398.00
Enriched Nitrox Course (up to 40%)

Enriched Nitrox Course (up to 40%)

SSI Enriched Air Nitrox Diver CourseTake your diving to the next level with Enriched Air Nitrox (EAN)—one of the most valuable certifications a recreational diver can earn.Nitrox contains a higher percentage of oxygen than standard air, allowing for longer bottom times, reduced fatigue, and shorter surface intervals. It’s no surprise that divers have been safely using Nitrox since the late 1980s—and now it’s your turn to experience the benefits.Course OverviewThis entry-level specialty certification prepares you to safely plan and dive using Enriched Air Nitrox blends from EAN22 to EAN40.Upon successful completion, you will be certified to dive with Nitrox independently and may continue your training with the Advanced Nitrox Upgrade.What You’ll LearnHistory and evolution of Nitrox divingOxygen exposure and safety considerationsBenefits and limitations of EANGas handling and analysis proceduresDive planning using tables and computersEquipment considerations for Nitrox divingPhysics and physiology of enriched airScheduleLecture Session: August 19 6:00 PM – 8:00 PM(Please confirm if this date works for you.)Course RequirementsCompletion of course materialsWritten examNo dives required—this is a classroom-based certification.PricingCourse Fee: $125SSI Digital Learning Kit: $99 (Includes certification card; student discount available at $89.99)Optional Hard Card: $25Bundle & SaveEnroll in an Advanced Adventure / Advanced Course along with Nitrox and receive: ✔ $50 off the Advanced course ✔ One complimentary EAN cylinder rental ✔ Additional cylinders available at $20 eachTotal savings: $70Ready to Dive Smarter?Nitrox is one of the easiest ways to extend your dive time and improve your overall diving experience. Spots are limited—secure yours today!

High Sierra Divers, 217 Palm Ave, 95603, Auburn, CA, USA
August 19, 2026
$125.00
 Altitude Diver Specialty Course

Altitude Diver Specialty Course

Altitude Diver Specialty CourseJoin Us for Our Upcoming Altitude Diver Course!Class Begins August 12, 2026 Altitude Dives at Lake Tahoe – August 16, 2026Have you ever wondered how diving at altitude affects your dive planning? When diving at elevations above 1,000 feet, special considerations and corrections must be made to ensure safe and accurate dive planning.In this course, you'll learn why altitude affects diving and how to properly adjust your dive planning before, during, and after your dives. The program includes an evening classroom session and at least two supervised altitude dives.You'll discover why depth gauges and dive tables can provide misleading information at altitude and learn the procedures necessary to compensate for these differences. We will introduce the Albright Altitude Table, a simplified method that eliminates the need to work through multiple tables and complicated calculations.Following the classroom presentation, students will work through practical exercises based on real-world diving situations to build confidence in altitude dive planning.This course is open to all certified divers, regardless of certification agency.Course Topics Include:• Why Altitude Corrections Are Necessary • Physics of Altitude Diving • Arrival Procedures at Altitude • Dive Planning Considerations • After-Dive Procedures • Albright Altitude Table • Dive Tables and Their Use at Altitude • Dive Computers and Altitude Compensation • Computer-Based Altitude Diving • U.S. Navy Dive Tables • SSI Recreational Dive Tables • Other Agency Dive TablesCourse Includes:• One Evening Classroom Session • At Least Two Supervised Altitude Dives (Typically at Lake Tahoe)Course Fees:Altitude Diver Course: $125.00 Digital Training Materials: $69.99 Certification Card: $40.00How to RegisterTo sign up, contact High Sierra Divers by phone, email, or visit our website and select Classes → Altitude Diver to access the online registration form.

High Sierra Divers, 217 Palm Ave, 95603, Auburn, CA, USA
August 16, 2026
$125.00

Dive Activity

Diving in California

California offers a diverse range of diving experiences that captivate dive travelers. Among the top dive sites are the Channel Islands, renowned for their vibrant kelp forests and abundant marine life. Wreck diving enthusiasts will find allure in the Yukon, an artificial reef off San Diego, providing a hauntingly beautiful underwater landscape. For shore dives, La Jolla Cove is a prime spot, offering easy access and the chance to spot playful sea lions and colorful Garibaldi fish. Unique underwater experiences abound in California, with night dives revealing the bioluminescence of plankton and the nocturnal activities of marine creatures. Dive travelers can enjoy a balance between shore diving options, like Monterey Bay's rich biodiversity, and liveaboard adventures to more remote locations like the Farallon Islands. Whether exploring sunken ships or admiring the coastal marine life, California's dive sites promise unforgettable underwater journeys.

Dive Centers

Dive Sites

The best Months to dive in California

California offers diverse diving conditions throughout the year, with opportunities available across various seasons. During the summer, water temperatures average around 17°C/63°F, leading to warmer and more comfortable dives. Winter temperatures drop to about 13°C/55°F, requiring thicker wetsuits or drysuits. Visibility can range from 3 to 30 meters/10 to 98 feet depending on location and conditions, with clearer waters often found in offshore sites.

Diving is possible year-round; however, certain factors can affect the experience. Winter months can bring stronger winds and currents, impacting surface conditions and visibility. Spring and fall are popular for their calmer seas and moderate temperatures. Overall, while diving is feasible at any time, divers should consider local weather patterns and coastal conditions when planning their trips for the best experience.

Top Wildlife Sightings in California

California's waters are teeming with marine life, making it a diver's paradise. Common reef fish include the bright orange Garibaldi and the colorful California sheephead, both easily spotted around kelp forests. These areas also host schools of blacksmith fish and opaleye, providing an animated underwater environment year-round.

Seasonal highlights in California include sightings of leopard sharks and bat rays, especially during the warmer months along sandy bottoms and coastal shallows. Sea turtles, though less common, can occasionally be encountered in Southern California waters, while hammerhead sharks make rare appearances in summer. Divers might also be lucky to spot the majestic giant sea bass, a notable species often seen near reefs and wrecks.

Wildlife Sightings are Based on User Generated Content

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 7

Sea Lion

Sea Lion

3.2k Sightings
J
121
F
163
M
236
A
252
M
301
J
325
J
367
A
373
S
349
O
305
N
232
D
163

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 300

Octopus

Octopus

1.2k Sightings
J
61
F
69
M
69
A
82
M
94
J
55
J
157
A
125
S
170
O
134
N
104
D
61

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 200

Moray Eel

Moray Eel

613 Sightings
J
11
F
22
M
34
A
28
M
45
J
52
J
101
A
115
S
60
O
65
N
46
D
34

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 600

Wrasse

Wrasse

277 Sightings
J
19
F
8
M
23
A
12
M
10
J
29
J
48
A
64
S
26
O
16
N
16
D
6
Green Turtle

Green Turtle

127 Sightings
J
7
F
15
M
12
A
6
M
15
J
16
J
16
A
12
S
7
O
6
N
8
D
7
Garibaldi Damselfish

Garibaldi Damselfish

4.6k Sightings
J
153
F
186
M
223
A
260
M
352
J
561
J
709
A
770
S
536
O
443
N
301
D
141

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 7000

Crab

Crab

3.9k Sightings
J
163
F
226
M
208
A
351
M
384
J
401
J
526
A
430
S
377
O
417
N
269
D
197

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 55

Lobster

Lobster

1.8k Sightings
J
100
F
86
M
139
A
90
M
111
J
187
J
226
A
227
S
203
O
287
N
145
D
45

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 60

Spiny Lobster

Spiny Lobster

1.7k Sightings
J
55
F
39
M
107
A
75
M
90
J
105
J
251
A
235
S
247
O
327
N
134
D
53

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 80

Stingrays

Stingrays

1.1k Sightings
J
48
F
91
M
62
A
69
M
91
J
94
J
166
A
123
S
111
O
121
N
81
D
77

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 3000

Nudibranch

Nudibranch

1.1k Sightings
J
40
F
85
M
63
A
112
M
125
J
95
J
141
A
118
S
85
O
117
N
85
D
54

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 250

Grouper/Basslets

Grouper/Basslets

1k Sightings
J
16
F
29
M
23
A
79
M
89
J
101
J
174
A
216
S
132
O
103
N
53
D
6

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 19

Seal

Seal

932 Sightings
J
51
F
34
M
87
A
66
M
62
J
89
J
94
A
105
S
120
O
109
N
72
D
43

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 35

Trout

Trout

639 Sightings
J
2
F
4
M
1
A
9
M
41
J
95
J
163
A
139
S
113
O
65
N
7
D
0

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 120

Flounder

Flounder

522 Sightings
J
15
F
45
M
15
A
13
M
32
J
58
J
98
A
77
S
58
O
50
N
42
D
19

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 19

Bass

Bass

516 Sightings
J
8
F
6
M
13
A
25
M
76
J
119
J
143
A
63
S
35
O
15
N
9
D
4

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 3400

Shrimp

Shrimp

281 Sightings
J
1
F
1
M
8
A
16
M
27
J
26
J
50
A
25
S
43
O
49
N
31
D
4
Sea Otter

Sea Otter

268 Sightings
J
17
F
17
M
43
A
62
M
20
J
32
J
16
A
21
S
20
O
7
N
11
D
2

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 130

Pipefish

Pipefish

228 Sightings
J
0
F
0
M
14
A
14
M
0
J
14
J
49
A
37
S
48
O
35
N
17
D
0

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 20

Guitarfish

Guitarfish

198 Sightings
J
1
F
4
M
11
A
24
M
26
J
16
J
31
A
46
S
15
O
22
N
2
D
0

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 100

Parrotfish

Parrotfish

156 Sightings
J
6
F
11
M
14
A
11
M
12
J
18
J
17
A
23
S
22
O
5
N
4
D
13
Moon Jellyfish

Moon Jellyfish

152 Sightings
J
6
F
5
M
2
A
1
M
11
J
19
J
11
A
10
S
7
O
23
N
22
D
35

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 250

Scorpionfish

Scorpionfish

142 Sightings
J
11
F
2
M
3
A
17
M
7
J
5
J
5
A
17
S
28
O
21
N
14
D
12

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 90

Angelfish

Angelfish

136 Sightings
J
5
F
10
M
9
A
10
M
21
J
15
J
7
A
11
S
14
O
10
N
7
D
17

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species approx.: 130

Butterfly Fish

Butterfly Fish

122 Sightings
J
4
F
11
M
9
A
7
M
16
J
15
J
19
A
10
S
10
O
6
N
5
D
10

Curated by Interest

Events by Lifestyle Category

Underwater Beginner