Sunday Riley Tidal Deep Hydration and Plumping Serum Review
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If you’re on the hunt for a hydrating serum that goes beyond the basics, the Sunday Riley Tidal Deep Hydration and Plumping Serum is one that genuinely stands out. From the very first use, it feels like more than just a typical hyaluronic acid formula – it delivers that instantly satisfying plump, glossy finish while quietly working to support the skin barrier and lock in hydration for the long haul. I’ve been testing it and here’s what you need to know.
What is Sunday Riley Tidal Deep Hydration and Plumping Serum?
The Sunday Riley Tidal Deep Hydration and Plumping Serum is a multi-tasking hydrating treatment designed to deeply moisturise, visibly plump the skin, and support the skin barrier.
It combines multiple forms of hyaluronic acid with advanced hydrating and smoothing ingredients, making it much more than a standard hydration serum. It’s all about creating that soft, supple, well-hydrated skin that lasts all day.
Key Ingredients
Barrier-Supporting Ingredients: to strengthen the skin so it can retain hydration more effectively
Five Types of Hyaluronic Acid: to– deliver multi-depth hydration both instant and long-lasting moisture
Polyglutamic Acid: powerful moisture-binding ingredient that helps keep skin feeling plump and hydrated for longer
Lotus-Derived Mucin (Vegan Alternative to Snail Mucin): to create that bouncy, glass-skin effect while boosting hydration
Silk-Derived Peptides: for smoother-looking skin and to help maintain elasticity
Sunday Riley Tidal Deep Hydration and Plumping Serum Review
Texture & Application
The texture of the Sunday Riley Tidal Deep Hydration and Plumping Serum is honestly one of my favourite things about it.
It has a slightly dense, cushioned feel that sits somewhere between a classic serum and a light cream. It feels really satisfying to apply and gives you that sense of instant comfort on the skin.
It spreads easily, absorbs well, and doesn’t disappear too quickly, so you can actually enjoy working it in.
Hydration & Performance
In terms of hydration, the Sunday Riley Tidal Deep Hydration and Plumping Serum really delivers.
Because it combines multiple weights of hyaluronic acid with polyglutamic acid, it doesn’t just give that quick hit of hydration, it actually keeps skin feeling comfortable and moisturised throughout the day.
It genuinely feels like it locks hydration in, rather than just sitting on the surface.
Finish on the Skin
The finish is beautifully balanced. The Sunday Riley Tidal Deep Hydration and Plumping Serum leaves skin looking fresh, smooth and slightly glossy, but without tipping into anything greasy or overly dewy.
It gives that healthy, hydrated glow that works perfectly both on its own and under makeup.
Plumping & Smoothing Effect
This is where you really start to see the difference. The serum gives skin a noticeably plumper, more elastic look, with that soft bounce that makes everything appear fresher and more refined.
Over time, thanks to the added peptides, skin will also feel smoother and more even in texture.
Barrier Support
It’s not just about adding hydration, it’s about helping your skin hold onto it. When your barrier is in good shape, everything else in your routine works better, and this serum really supports that.
Final Thoughts
The Sunday Riley Tidal Deep Hydration and Plumping Serum is a great choice if you want a hydrating serum that does more than just the basics.
It combines a really enjoyable, slightly creamy texture with impressive hydration performance, plus that added benefit of barrier support and smoothing peptides.
If you love plump, fresh, healthy-looking skin but don’t want anything heavy, this is definitely worth considering.
Where to buy it
The Sunday Riley Tidal Deep Hydration and Plumping Serum is £70 and available via the links below. If you shop at Sephora UK, use code REALLYREESPH for £10.50 off.
Offers
If you are still looking for a serum, check out my Best Serums for 2026 – all Skin Types & Budgets blog post.
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