Top Aquariums in Wales: The Ultimate Family Day Out Revealed! (2026 Guide)

If your kids are curious about crabs, catsharks, and crocodiles, treat them to an aquatic adventure in Wales. Thanks to the country’s abundance of stunning coastlines and sandy beaches, local marine sanctuaries host a fascinating collection of native wildlife and exotic rescue animals.

You will see unusual crustaceans and curled octopi hiding among the marine plants. Some locations even provide a loving home to harbour seals and penguins, where children can get involved in feeding times and interactive presentations. Once you have exhausted the indoor tanks, you can even book guided beach safaris that encourage little ones to find creatures in their natural habitat!

📝 Important 2026 Update for Visitors: Please note that the popular SeaQuarium in Rhyl permanently closed its doors in late 2023 and the site has since been cleared. However, as you will see below, Wales still offers a wealth of incredible marine encounters!

Keep reading as we round up the most exciting sea aquariums, zoo, farm and marine exhibits in Wales to visit during your trip.

Aquariums in North Wales

Anglesey Sea Zoo

Thanks to its spectacular location on the northwest coast of Wales, Anglesey attracts hundreds of unique animals, including playful grey seals, dolphins, and porpoises.

With a wealth of unique species right on its doorstep, Anglesey Sea Zoo is undeniably one of the best aquariums in Wales. What makes this venue so special is its strict focus on British marine life. It features over 40 spacious tanks showcasing local species, each carefully replicated to mimic natural habitats—meaning you won’t find tropical sharks here, but you will find incredible native wonders.

In the No Bone Zone, you can watch mesmerising moon jellyfish and starfish slowly skulking across the seafloor. If you’re feeling a little braver, head to The Shipwreck to spot shy conger eels hiding in the ruins, or check out their vital conservation work in the Lobster Hatchery.

Quick Facts: Anglesey Sea Zoo

2026 Standard Pricing: Adults: £12.00 | Children: £10.50 | Under 3s: Free

Address: Brynsiencyn, Llanfairpwll, Anglesey, LL61 6TQ

Facilities: Features a fantastic outdoor adventure playground, a crazy golf course, and the award-winning Lighthouse Bistro serving local Welsh produce.

The Best Aquariums in South & West Wales

Sea Môr Aquarium & Ocean Lab (Fishguard)

Run by the marine conservation charity Sea Trust Wales, the Sea Môr Aquarium is a completely unique “Catch and Release” aquarium. This means animals are carefully collected from local waters, cared for as part of an educational programme, and safely returned to the sea after a few months.

Kids and big kids alike are sure to adore the interactive, self-guided tours where marine biologists are always on hand to reveal amazing facts about each species. Beyond the tanks, Sea Trust also runs incredibly popular Seashore Safaris. These guided rock-pooling sessions take you straight down to the beach to find crabs, anemones, and starfish in the wild.

Quick Facts: Sea Môr Aquarium

2026 Standard Pricing: Adults: £8.00 | Children (15 & under): £6.00 | Under 2s: Free

Address: Ocean Lab, The Parrog, Goodwick, Fishguard, Pembrokeshire, SA64 0DE

Facilities: Features the “Discover Môr” Virtual Reality ocean experience and the highly-rated Ocean Lab Café. They also offer ‘Quiet Slots’ for visitors with sensory processing needs.

Plantasia Tropical Zoo (Swansea)

If you’re looking for a jam-packed day out in the city that’s full of amphibious creatures, you will love Plantasia Tropical Zoo. Designed to mimic the hot and humid environments of South America and the Amazon basin, this massive glass hothouse gives you an insight into unfamiliar landscapes and the strange animals that live there.

You could spend hours losing yourself within the jungle trails, discovering over 40 different exotic species. There are red-bellied piranhas with powerful jaws living next door to poison dart frogs and bird-eating tarantulas. While most sea aquariums in Wales focus on coastal fish, Plantasia is the place to go if you want to see Caiman crocodiles relaxing beneath a towering indoor waterfall!

Quick Facts: Plantasia Tropical Zoo

2026 Standard Pricing: Adults: £9.95 | Children (3-15): £7.95 | Under 3s: Free

Address: Parc Tawe Retail Park, Swansea, SA1 2AL

Facilities: Interactive rainforest trails, a jungle-themed café, and an extensive gift shop. Fully climate-controlled, making it the perfect rainy-day activity.

Folly Farm Adventure Park (Pembrokeshire) – Worthy Mention

Folly Farm is widely considered one of the best family days out in Wales, and its marine enclosure is world-class. Head straight to the Penguin Coast exhibit to watch their lively colony of Humboldt and Macaroni penguins.

The enclosure features brilliant underwater viewing windows, allowing little ones to stand nose-to-beak with the penguins as they torpedo through the crystal-clear water.

Quick Facts: Folly Farm

2026 Standard Pricing: Adults: £29.00 | Children (2-15): £27.00 | Under 2s: Free (Note: Book online in advance for a 5% discount)

Address: Begelly, Kilgetty, Pembrokeshire, SA68 0XA

Facilities: Alongside the zoo, there is a massive indoor vintage fairground, numerous restaurants, and huge adventure play areas.

Welsh Mountain Zoo (Colwyn Bay) – Worthy Mention

While not strictly an indoor aquarium, no list of Welsh marine life is complete without the Welsh Mountain Zoo. Set high above the coast town of Colwyn Bay, this sprawling conservation park is home to incredible marine mammals, including Californian sea lions and Humboldt penguins.

The zoo offers awe-inspiring daily feeding presentations where friendly keepers explain the animals’ natural habitat and behaviours. For an unforgettable 2026 holiday treat, you can even pre-book a “Penguin Encounter” to get up close and personal with the colony!

Quick Facts: Welsh Mountain Zoo

2026 Standard Pricing: Adults: £15.15 | Children (3-15): £11.40 | Under 3s: Free (Note: Book online in advance for discounted rates)

Address: Old Highway, Colwyn Bay, Conwy, LL28 5UY

Facilities: Safari Restaurant, multiple picnic areas, and accessible viewing platforms.

Find More Exciting Wildlife in Wales

With a treasure chest of zoos, farms, and aquariums, Wales is the perfect destination for wildlife watchers and aspiring biologists alike. Alongside fish and other sea creatures, you could head into the deep countryside to spot birds of prey or make some farmyard friends.

Looking for more family-friendly inspiration? Explore our blog to discover some of the country’s best attractions for animal enthusiasts, including our ultimate guide to the Best Petting Zoos in Wales!

Here is a highly optimized FAQ section based on the 2026 Aquariums in Wales guide, complete with the corresponding JSON-LD schema code to help you grab those valuable Google rich snippets.

Frequently Asked Questions: Welsh Aquariums

Is the SeaQuarium in Rhyl still open?

No, the SeaQuarium in Rhyl permanently closed its doors in late 2023 and the building has since been demolished. However, North Wales still has fantastic marine attractions like the Anglesey Sea Zoo and the Welsh Mountain Zoo.

Where can I see penguins in Wales?

If you want to see penguins, you have two fantastic options! In North Wales, you can visit the Humboldt penguin colony at the Welsh Mountain Zoo in Colwyn Bay. In South Wales, head to Folly Farm Adventure Park in Pembrokeshire, which features a world-class ‘Penguin Coast’ enclosure with underwater viewing windows.

What is the best aquarium in North Wales to see local wildlife?

Anglesey Sea Zoo is the premier destination for native marine life. Unlike traditional aquariums that feature tropical fish, they focus entirely on British marine species found around the UK coastline, including moon jellyfish, conger eels, and native octopi.

Are there any indoor aquariums in South Wales for a rainy day?

Yes! Plantasia Tropical Zoo in Swansea is an incredible, fully indoor, climate-controlled hothouse. It is the perfect rainy day activity, allowing you to walk through a tropical jungle environment and spot piranhas, poison dart frogs, and even Caiman crocodiles.

How much does it cost to visit the Anglesey Sea Zoo in 2026?

Standard 2026 admission for the Anglesey Sea Zoo is £12.00 for adults and £10.50 for children, with kids under 3 entering for free.

Nick

Nick, your trusted guide to Wales travel and exploration, shares a deep passion for this enchanting land. With years of exploration, Nick offers expert insights into the best of Wales. Join him on a journey through its captivating history, culture, and hidden gems, as he inspires you to create unforgettable Welsh travel experiences.