10 of the Best Age Appropriate Bikinis for Teens and Tweens

Age appropriate bikinis for teen girlsAs a Mum to an almost 13-year old, finding suitable (age appropriate) bikinis for teen girls is becoming an annual palaver. 

Like many girls her age, Flea loves being on the beach. But it’s increasingly important to Flea that her swimwear looks just right.

My girl used to be happy with board shorts and a rash vest I’d choose from Boden. These days, it’s got to be a bikini, and she’s ridiculously particular about designs.

But then – so am I.

Flea is 12, not 20. She doesn’t need teeny triangles or something that makes her look five years older than she is. She needs strong straps and decent coverage.

Because when you’re a young girl, nothing’s more inhibiting than worrying you might inadvertently flash some strangers on the beach.

Last summer, after a lot (seriously, a LOT) of hunting we found the crop top bikini at the top of this page. It was in the girls’ range at River Island. Flea thought it was really cute, and I was also happy with the coverage. There are loads of designs available in this year’s collection.

But River Island only provides these suits in sizes up to 11-12.

Newsflash, River Island: just because my girl has turned 12, doesn’t mean I want her wearing these items…

Honestly, it’s a similar story at a lot of my go-to retailers. Either the girls’ swimwear stops at age 12, or is too revealing, or it goes too far the other way. 

Come on, Boden. No 13-year-old that I know wants to be wearing the same as the 5-year-old who’s building a sandcastle down the beach.

Okay, enough complaining.

We’ve put in the hard work so you don’t have to. Here are 10 fab tankinis or bikinis for teen girls. We reckon they’re cool enough for the most discerning teen. But they’re practical and modest enough to please parents, too.

Ten of the Best Bikinis for Teen Girls & Tweens


Jack Wills, Bikini Top (£29) and Bikini Bottoms (£19)

best bikinis for teen girls

This ‘Penbryn’ bikini design is available in a size 4 to 16, making it one of my favourite bikinis for teen girls. It’s selling out fast, so if you like the look of this one, order it now!

Nike, Pendleton Quick Dry Bikini Top, £69.95

best bikinis for teen girls

Not gonna lie, this range is pretty expensive as far as bikinis for teen girls go.

But if you have a child who’s going to be swimming, surfing or doing lots of sporty activities this summer, this design is available in various colours, with co-ordinating throw-over vests and leggings. Order it here.

Debenhams, Monsoon Kiko Tankini, £17.99

swimwear for teens

This longer-line tankini gives a bit more coverage, making this tankini for teens a good option for younger girls It’s also available for under £20 via the Monsoon website or at Debenhams. Great value!

H&M, Always on Vacay Tankini, £9.99

where to find bikinis for teen girls

I love this design, and Flea’s a fan too. And you can’t really argue with the price, can you? Perfect for light use around a swimming pool, I reckon. It’s available online here.

New Look, Turquoise Beach Club Tankini, £10.49

modest tankini for girls

New Look has a fabulous range of bikinis and tankinis for girls aged 9-15 that are cool, but still age-appropriate. This one is definitely one of Flea’s favourite swimwear options for the summer.

New Look, Red Hawaii Tankini, £10.49

bikini for teen girl UK

Another great buy from New Look, this is a gorgeous colourful option for the summer holidays – and it’s on sale right now! We love this one because we’re feeling a bit sentimental about our trip to Hawaii right now…

Billabong, Moon Tribe Tankini, £18+

Billabong actually has some of the best bikinis for teen girls, but they’re tricky to find in the UK. Check out Amazon to hunt down the “Moon Tribe” and “Girls Like This” ranges which have some great designs available from a size 4. These are sold via Amazon.com, though, so you may need to fork out for shipping. Check out the US site for the full range (there’s a sale on, which might offset shipping costs if your tween girl loves one of these designs)

Sunuva, Crop Rash Vest, £50


Sunuva actually has a section on its site devoted to young teens aged 9-14, with loads of mix and match options including bikinis, shorts, rash vests and crop rash vests. Everything has 50+ UVA protection, which is always a bonus in our fair-skinned family.

I would say, 100% this is the best range of bikinis for teen girls that I’ve found. I love that Flea can swim on the beach, add a pair of shorts, and be instantly ready to pop for lunch somewhere. Check out the range here.

Matalan, Neon Single Strap Bikini, £10

This cheerful and bright bikini isn’t entirely Flea’s taste, but if you’ve got a teen who likes to be SEEN on the beach then this option from Matalan might fit the bill.

Abercrombie & Fitch, White Palm Bikini, £39

swimwear for teens

This item is actually available via Next, and is a low-key design that’s perfect for Flea. Also: buying from A&F actually earns me 50 bonus Cool Mum points because it’s a Teen Approved Brand. Parents of other tween and teen girls will understand what I mean by this. Available in ages up to 14 here.

Sunuva, Pink Flamingo Reversible Bikini, £42

SPF swimwear for teens

Another great option from Sunuva, this reversible design offers great coverage with the added bonus of SPF 50+ protection, meaning your girls are a bit less likely to turn pink in the sun! I would personally order this with the shorts, but you can mix and match depending on your preference.

There you have it! Our guide to the best bikinis for teens this summer. Let us know your favourites in the comments!




Sally is a full-time blogger and founder of the Tots100, Trips100, Foodies100 and HIBS100 communities, along with the MAD Blog Awards. She spends a bit too much time on the Internet. She’s also a very happy Mum to Flea, the world’s coolest ten year old.

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  1. Kelly Dunsdon
    2nd May 2018 / 7:22 pm

    Such a great post. I have a 13 year old too and we’ve just been on holiday… The struggle to find something appropriate was tricky!! Like you, we went for a couple of the New Look bikini’s which were perfect… It was hard to get the balance between childlike and beach babe though!!

  2. 2nd May 2018 / 8:58 pm

    These are great ! Yes difficult to get it right – I like the Monsoon one

  3. 2nd May 2018 / 9:03 pm

    Perfect. Mine is not a fan of a tankini sadly, but loves the crop top style of bikini. We found one in Primark that has lots of really pretty straps, plus an overlay frill that says cool bikini without being skimpy.

  4. 4th May 2018 / 6:49 am

    In defence of Boden, my super tall seven year old has just grown out of age twelve clothes so they are a massive hit with us because she still is the little girl making a sandcastle! These are a wonderful collection though and there are quite a few would suit her without being too old so I shall be bookmarking and shopping!!

  5. 15th May 2018 / 11:50 am

    These are brilliant choices Sally! I’m actually looking for something similar to the Jack Wills suit myself. I have been wearing one piece for years and want to try to go back to a bikini but want something with more coverage. The New Look ones are very cute too!

  6. 27th May 2018 / 10:24 am

    Thank you for saving me hours trawling through websites trying to find suitable ones, I have the same problem every year for the three girls, that’s E sorted, my only problem this year is that both N and X no longer fit in teens, half the women’s choices I wouldn’t even wear myself, not everyone wants teeny tiny triangles on the beach!! Although a good excuse for a girlie shopping day!