Is it safe to swim at Blue Hole Regional Park?

Swimming access at Blue Hole is contingent on precipitation and groundwater flow. If bacteria and/or visibility conditions become unsafe, swimming will be suspended. We will monitor those conditions daily and update information on our website and social media pages.



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Blue holes, physically, are hazardous due to their structure and depth. Their surrounding walls cause bad water circulation, meaning the water is generally depleted of oxygen. Their depth needs specialized training. Nitrogen narcosis will be common.

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Jacob's Well is perhaps the longest underwater cave in Texas and an artesian spring that delivers several thousand gallons of water per minute. It acts as the headwaters to Cypress Creek that flows through Wimberley into Blue hole and then to the Blanco River.

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The crystal-clear waters of Blue Hole stay an ideal 75 degrees all year round and are shaded by towering cypress trees. Manicured waterside lawns are the perfect place to spread out a blanket and crack open your cooler.

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They are a perfect age to enjoy the falls. I saw many younger children there and different age groups of people. Our family used Liberty Tours Jamaica, and were very satisfied with the service they provided to us. Their drivers are very knowledgeable and patient.

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Swimming at Jacob's Well is currently not permitted. Please note that the park is still open for hiking and viewing the spring during our regular hours. Plus we have geocaching, bird watching and a Nature Center to explore and enjoy! We also have picnic areas, a labyrinth, a sundial, and a Loose Parts Play Area!

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As of June 29, 2022, swimming will not be allowed at Jacob's Well Natural Area (JWNA) for the foreseeable future. The threat of high bacteria levels, other pollutants and poor visibility conditions are unsafe for swimming.

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The Blue Hole is a world-renowned marine site, attracting divers and snorkelers from around the globe eager to explore its incredible underwater formations, including stalactites and limestone formations.

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After about a dozen divers drowned trying to explore the bottom of Jacob's Well, the fourth chamber was finally sealed up for good.

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There are no bats, of course, but there are catfish, perch, turtles – at the beginning of the cave – and then deep in, there are blind Texas salamanders to keep you company. You can't scuba dive there without a special permit from Hays County, and the only entity that has one is the Jacob's Well Exploration Project.

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Temperature of the water in Jacob's Well remains a near-constant 68°F and visibility is typically excellent. The spring provides habitat to numerous species of fish (principally sunfish and perch); turtles; aquatic insects; crustaceans; and, most notably, the cave-adapted Fern Bank salamander (Eurycea pterophilia).

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The mystery, wonder and uniqueness of the Great Blue Hole make it one of the best dives on the planet, but a short scenic flight is also a great way to see the wonder from above. In short, do both and regret nothing!

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