Undersea Expedition: Catalina Island Tour
Catalina Island, United States

Undersea Expedition: Catalina Island Tour

Outty Ranking 58 4.4 · 137 traveler reviews0.8 hoursFrom $53
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Outty Ranking

58/100

Worth a Look. Our proprietary evaluation. How we score

Traveler rating

4.4/5

Based on 137 traveler reviews. Ratings and reviews provided by Viator and Tripadvisor.

Quick answer

Is Undersea Expedition: Catalina Island Tour worth booking?

Undersea Expedition: Catalina Island Tour is a 0.8-hour experience in Catalina Island, United States, from $53 per person. It scores 58 out of 100 on the Outty Ranking, which we label “Worth a Look”, based on a 4.4/5 rating across 137 reviews. This booking is non-refundable, so pick your date carefully. Same-day spots are currently showing.

Outty Ranking
58 / 100
Rating
4.4/5 (137)
Duration
0.8 hours
From
$53 per person

Descend 5 feet beneath the surface of one of California’s most extraordinary marine ecosystems, all from the comfort of your own personal porthole in our semi-submersible. Gaze at Giant Kelp forests rising from the ocean floor as large schools of calico bass, bright orange garibaldi, and the occasional diving cormorant or seal pass by to say hello. The top of the boat always remains above the surface in case you need to head upstairs for some fresh air! Our captain also offers a harbor cruise on the ride back to the dock so you can look for dolphins and enjoy the ocean breeze while taking in the stunning views of Avalon.

What you get

    About this experience

    Descend 5 feet beneath the surface of one of California’s most extraordinary marine ecosystems, all from the comfort of your own personal porthole in our semi-submersible. Gaze at Giant Kelp forests rising from the ocean floor as large schools of calico bass, bright orange garibaldi, and the occasional diving cormorant or seal pass by to say hello. The top of the boat always remains above the surface in case you need to head upstairs for some fresh air! Our captain also offers a harbor cruise on the ride back to the dock so you can look for dolphins and enjoy the ocean breeze while taking in the stunning views of Avalon.

    What's included

    Included

    • Live commentary on board

    Not included

    • Gratuities

    What you'll see and do

    1. Catalina Expeditions Tours

      Boat By

      Pass by without stopping

    2. Green Pleasure Pier

      Tour starting location Gate C

      Pass by without stopping

    Where it starts and ends

    Meeting point

    Catalina Island

    Line C, left hand side of the Pier.

    Hotel pickup

    No pickup: everyone meets at the start point.

    Ends at

    Line C, left hand side of the Pier.

    Before you book

    Cancellation
    All sales are final. No refund is available for cancellations.
    Languages
    en
    Ticket
    Mobile Only
    Runs on
    Every day
    Group size
    Up to 10 travelers per booking
    Operated by
    Santa Catalina Island Company

    Know before you go

    • Public transportation options are available nearby
    • Infants are required to sit on an adult’s lap
    • Suitable for all physical fitness levels
    • Restrooms are not available while on tour, but are available at the base of the Green Pleasure Pier, so please use before check-in
    • Please check your email through Viator for your confirmation number and tour information

    Photos

    Undersea Expedition: Catalina Island Tour, photo 2Undersea Expedition: Catalina Island Tour, photo 3Semi-submersible, Undersea Expedition: Catalina Island Tour

    What travelers are saying

    Outty’s summary of the themes that recur across 135 traveler reviews. Written by us, not quoted from reviewers.

    Knowledge and storytelling

    3 mentions

    Reviewers describe the commentary as informative rather than scripted.

    Food and drink

    2 mentions

    The tastings and food stops are a highlight for most reviewers.

    Traveler reviews

    135 verified traveler reviews for Undersea Expedition: Catalina Island Tour. Ratings and reviews provided by Viator and Tripadvisor.

    5 star
    97
    4 star
    18
    3 star
    9
    2 star
    2
    1 star
    9
    Sort
    cathya230 · October 2026

    Unreliable

    On the ferry from Long Beach when I received a text cancelling the tour. Total waste of time and money not to mention it was the main event for the 5year old. Unreliable.

    via Tripadvisor

    Jacob_K · September 2026

    We ended up on a last...

    We ended up on a last minute booking as we ended out day in Catalina and saw the semi-submarines on the píer. This didn’t disappoint. We got the entire submarine to ourselves and enjoyed an amazing array of underwater fish with feedings. The crew was incredibly knowledgeable of the island and we got some of the best visibility to maximize our underwater viewing. Definitely recommend this unique experience!

    via Viator

    Armine_K · September 2026

    A little dissatisfied

    Not as expected. I’ve been to a similar experience at Catalina in the past, and there was more variety of colourful fish to see. Also , It was too cluster phobic. There was not enough air conditioning. A little disappointed this time.

    via Viator

    dianasH2052DF · September 2026

    Garibaldi and bass fish experience

    It was a great experience-I was hoping to see more than 3 types of fish-wish we had more stops. Feeding the fish food helped bring fish near the windows!

    Response from the operator: Thanks for the feedback! We're glad you had a great experience on the Undersea Sub Expedition. Your suggestions about more stops and variety are appreciated and will help us improve.

    via Tripadvisor

    David_P · September 2026

    Good Trip with Fish

    Enjoyable! 45 mins went fast! But saw lots of fish and even a turtle!! Captain and Skipper were a wealth of knowledge about the fish we saw. Awesome also a no cruise ship in, so only 6 of us!!

    via Viator

    Good to know

    Duration
    0.8 hours
    Free cancellation
    Non-refundable
    Minimum age to book
    All ages
    Availability
    Bookable today
    Runs on
    Every day
    Hotel pickup
    No pickup, meet at start point
    Booked in 30 days
    48
    Verdict
    Worth a Look

    Who runs this experience

    Operated by Santa Catalina Island Company, who run 9 experiences we rank across 1 city, with an average Outty Ranking of 66.9.

    See everything Santa Catalina Island Company runs

    Why this scores 58

    The Outty Ranking is a weighted composite. Here is how this experience performed on each component.

    Traveler sentiment (30% weight)59
    Review evidence (18% weight)76
    Booking momentum (14% weight)72
    Value for money (12% weight)54
    Listing quality (10% weight)82
    Local standing (8% weight)26
    Booking flexibility (8% weight)0

    Undersea Expedition: Catalina Island Tour: questions travelers ask

    Practical detail on this experience, plus the wider planning questions for Catalina Island.

    How much does Undersea Expedition: Catalina Island Tour cost?

    +

    Prices start at $53 per person. The final price depends on the date, the time slot and the number of travelers, and peak weekends in Catalina Island usually price higher than midweek mornings. Live pricing and remaining availability are confirmed on the booking screen before you pay.

    How long does Undersea Expedition: Catalina Island Tour take?

    +

    Plan for about 0.8 hours from start to finish, not counting travel to the meeting point. Most travelers leave another 30 minutes on either side so the rest of the day in Catalina Island is not rushed.

    Is Undersea Expedition: Catalina Island Tour worth it?

    +

    It holds an Outty Ranking of 58 out of 100, which we label "Worth a Look". That score blends traveler sentiment (4.4/5 across 137 reviews), the depth of that review evidence, recent booking momentum, value for money against comparable outdoors in Catalina Island, and how flexible the cancellation terms are.

    Can I cancel or reschedule Undersea Expedition: Catalina Island Tour?

    +

    No. This experience is sold on a non-refundable basis, so only book a date you are confident about. Similar experiences in the city do offer free cancellation if flexibility matters more than price.

    Is Undersea Expedition: Catalina Island Tour suitable for kids and families?

    +

    Yes, all ages are welcome. Families should still weigh the 0.8-hour running time, and strollers are easier on the earlier, quieter departures.

    How far in advance should I book Undersea Expedition: Catalina Island Tour?

    +

    Around 48 people booked this in the last 30 days, so popular slots go early. Two to three weeks ahead is comfortable in shoulder season, while summer weekends and holidays in Catalina Island can sell out a month out. Same-day spots do open up when other travelers cancel, so it is worth checking if you are already in town.

    What should I bring or wear?

    +

    Bring photo ID, your booking confirmation on your phone, a refillable water bottle and comfortable shoes. Dress for the weather in Catalina Island and add a light layer if any part of the 0.8-hour experience runs outdoors or after sunset.

    Where does Undersea Expedition: Catalina Island Tour start and how do I get there?

    +

    The exact meeting point and directions are on your voucher once you book, and they sit in central Catalina Island within reach of public transport. Arrive 15 minutes early: late arrivals are treated as no-shows by most operators.

    What are the best things to do in Catalina Island?

    +

    Catalina Island packages ferry transfers with glass-bottom boats, submarine and snorkel tours in Lover's Cove, zip lining, Avalon golf-cart tours and inland bison safaris. On Outty we rank every Catalina Island experience on the same 0 to 100 scale, and alongside this one the highest scorers right now include Catalina Food Tour, Catalina Island Private Guided Golf Cart Tour of Avalon, Haunted Catalina Walking Ghost Tour. The city page groups everything into most popular, highest reviewed, last minute and family-friendly so you can build a day around what actually delivers.

    When is the best time to visit Catalina Island?

    +

    May to October, with the calmest crossings in summer. Booking patterns follow the same curve: prices and queues climb in peak weeks, while shoulder season gives you better availability on the top-ranked experiences and more room to change plans.

    How many days do you need in Catalina Island?

    +

    Three full days covers the headline sights without sprinting. A workable rhythm is one anchor experience each morning, such as this one, an unhurried afternoon in a single neighborhood, then a food or nightlife booking in the evening. Five days lets you add a day trip outside the city.

    Do I book through Outty or through the operator?

    +

    Outty ranks and explains the experiences, then hands you to Viator to complete the booking with the operator directly. The price is the same as booking on Viator yourself, and Outty earns an affiliate commission on the referral, which is how the rankings stay free to read.

    What is included in Undersea Expedition: Catalina Island Tour?

    +

    Included: Live commentary on board. Not included: Gratuities. Always check the voucher for the final list before you travel.

    Where is the meeting point for Undersea Expedition: Catalina Island Tour?

    +

    Line C, left hand side of the Pier. Hotel pickup is not included, so plan your own transport and arrive 15 minutes early.

    What languages is Undersea Expedition: Catalina Island Tour offered in?

    +

    It runs in English. Pick your language when choosing a date and time, as not every departure runs in every language.

    Will I get instant confirmation and a mobile ticket for Undersea Expedition: Catalina Island Tour?

    +

    Confirmation is sent by the operator after booking, usually within 48 hours; if it is not confirmed you are not charged. Mobile tickets are accepted, so you can show the voucher on your phone.

    Is Undersea Expedition: Catalina Island Tour wheelchair or stroller accessible?

    +

    The operator notes: Infants are required to sit on an adult’s lap. If accessibility is critical, contact the operator after booking to confirm arrangements for your date.

    What happens to Undersea Expedition: Catalina Island Tour if the weather is bad?

    +

    This experience depends on good weather. If it is canceled because of poor weather, you are offered a different date or a full refund.

    What do travelers say about Undersea Expedition: Catalina Island Tour?

    +

    Across 137 reviews averaging 4.4 out of 5, recurring themes include knowledge and storytelling, food and drink. Reviewers describe the commentary as informative rather than scripted.

    Ready to lock in your spot?

    Pick a date, choose your group, and see the exact price for Undersea Expedition: Catalina Island Tour.

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