Summer time!


We are open Thursday thru Sunday until next July, when we expect to be open every day.

To make a reservation-435-884-3874


Seabase is an in-land location for Utah diving and snorkeling. This geothermally heated, salt water, high altitude mini ocean with colorful tropical marine fish is the only one of its kind for SCUBA, snorkeling, and dive training. Whether you are feeding the beautiful French angel fish or the enthusiastic pork fish, you'll never believe you are in the middle of Utah. 

According to our research, Nurse sharks only live about 20 years.  We had our friendly nurse sharks for 24 years and they were not tiny when we got them-so we estimate about 25 years old. They had a long and eventful life, but we will certainly miss them.  The smaller fish in Seabase will not miss them!

   It is only $20 per day to come to Seabase for snorkeling or SCUBA, for the day, and rentals are available, if you don't have your own gear- click on the "rentals" button on top of this page for all rental prices....or $5 for just hanging around, watching the fish get fed, letting the mollies tickle your toes, and seeing the "water people" having fun.!

  Normal Seabase Hours:

We make appointments that are good for the whole day-so try to come early.

  We are open all year, Thursdays, Fridays, Saturdays and Sundays for the rest of the year except Christmas Eve and day.  Be sure to let us know when you are going to be coming! Now that it is September we go back to our normal 4 days per week, Thursday through Sunday. Always by appointment, please!


Thursday and Friday, 9 AM to 3 PM   

Saturdays & Sundays, 8 AM to 3:30 PM: If you are here after hours, it is a minimum of an ADDITIONAL $20/hour (or part of an hour) , and it is pretty dark in the water by 3:30, because the mountains are just west of us!!  

 Mondays, Tuesdays and Wednesdays we are closed.  For groups, we can sometimes make arrangements-call to see if we can work around your schedule.

We feed the fish at opening time, so come early and see the feeding-it is fun! (Let us know you are coming out).  Observing the feeding is included in the $20 day pass, if you are here at opening time, ( and it is only $5.00 per person-if you don't want to get in the water). Please try to only use "reef safe" sunblock in the water, for the safety of the sealife. It is usually available at Neptune Divers in Salt Lake City. For total prices if you need rentals, click on F.A.Q. at the top of the page. We can sell you a mesh bag of food to take in the water (just $5) to do your own feeding.

All minors (under 18 years of age) MUST either bring their parents or a waiver signed (by parents). The waiver is printable, from the bottom left of this page


To get to Seabase from Salt Lake City, go west on I-80, until exit 84, get off freeway, and turn left on frontage road, then left again (going away from the Great Salt Lake) on SR 138 (Do not cross any railroad tracks-if you do, you went too far) for 5 miles, then left again, into our driveway. 

We have been annexed into Grantsville City-and were given a new street address. (it was 9390 West,)

now , to find us, it is :

 Bonneville Seabase                                                                    1600 NORTH SR 138                                                                           Grantsville Utah 84029-1179

      For snail mail, use P O Box 1179.

Google maps and other maps sites are often wrong, as are most GPS units-they will send you to our post office in Grantsville, or someplace even stranger.  If you still want to use your GPS, please use :

N: 40 degrees 38.784'

W: 112 degrees 31.475 '

 .   Watch for cattle on the road, as they get out of their designated spaces frequently, and they are not very smart..   


See some of our underwater life at Seabase on YouTube videos  !

the youtube video from China:

or just look in youtube for Bonneville Seabase-a couple of guys from Idaho did a very nice video with their GoPro camera...

                                                           photo of sunrise by Lynn Findlay

                                                                             angelfish, by Linda

to contact us:    or call  


Seabase Conditions as of 9.20.2015

White Rocks Bay
Habitat Bay
The Abyss






There was a special event at Seabase the 11th and 12th of September. They were sold out, so keep an eye out, and buy early for the next one-probably in April, to get the best price, and to get a ticket while there is still one available!


 For diving and snorkeling, cooler nights chill the surface of the water. The cover is back on White Rocks Bay, til  probably Memorial day next year, ..which is much nicer while  it can be a bit chilly.  Some people who were  diving with 3 ml suits said that was not enough, so plan to use a 7 ml, or at least a 5 ml suit these days.  The temperature swings have been bigger this year than ever before and the visibility is at 7.5 to 11 feet, and about 12 feet in the Abyss...  The grouper that likes to lurk under the feeding platform in Whiterocks bay is getting very large-  The fish make it fun to be here, but --be aware that the silt can get kicked up with a lot of divers, so do try to come early.  In the Abyss, the vis is usually a lot better, but there is not as much to see.  Seabase is a good snorkeling place, and the fish  get to the surface to eat lettuce from your fingers if you are not moving around enough to scare them. There are some bright blue damsels and pretty black and white cardinal fish in little hiding places around the walls.   Keep in touch so we can let you know when the water conditions change! (you can call 435-884-3874).


Snorkel and Dive in Utah

all year, with tropical marine fish!

  The sun reaches the mountain tops to the west rather early, even at this time of year, and by 3 in the afternoon, the water is shaded enough to make it harder to see-- so come in the morning for the most fun. 

 Opening time, when we feed the fish is a good time to start! - 8AM on weekends, and 9AM on Thursday and Friday and Holidays..

There are alot of new baby porkfish and little butterfly fish outside by the teaching platforms.  There are several kinds of friendly angel fish, monos, large mullet, snappers, huge groupers, lookdown jacks and banner fish, moorish idols, little damsels, butterfly fish, and you should see a bamboo shark in Habitat Bay and/or White Rocks Bay..


         In the Abyss, if you are quiet and persistant, you might find a few silver jennies and a bigeye soldier fish, definitely some mollies, and snails and tunicates.

   While you can see some of the fish from the surface, you can see a lot more if you are in the water and swimming slowly.  

     Habitat Bay has the "ship" wreck and the platforms. There are a lot of butterfly fish and porkfish around the structures..    The groupers and snappers can usually be found in the middle or North side of White Rocks Bay, or in Habitat Bay on the teaching platform, near the ship wreck, with a lot of brightly colored young pork fish and some monos and butterfly fish giing them a wide berth. 

    Abyss is usually a lot clearer-(but without many fish, so not so much fun!)  And because the Abyss is deep and not very wide, it will feel much warmer than the other bays.

    May '08


Photos by :

Lynn Findlay & Linda Nelson



Quick Links

Driving Directions

Child Waiver -


What's New

  "Divers Log" Section added to the Seabase web site. Read all about people's experiences at Seabase or submit you own comments.


Hours of Operations

Thursday and Friday - 9A-3P.
Saturday and Sunday - 8 A-3:30 P
Special Reservations Available for other day . 

  Call or e-mail for possibility of appointment.

Contact Seabase

E-mail -
Local - 435.884.3874




Photography by

Linda Nelson, Lynn Findlay and

Manta Vision

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