Rash Guards vs. Wetsuits: What to Wear Scuba Diving (and Why UPF 50+ Divewear Is a Game Changer)

Have you ever wondered what to wear scuba diving? Whether you're a new diver exploring warm tropical reefs or a seasoned pro descending into cooler depths, choosing the right divewear can make all the difference for comfort, safety, and sustainability.

At The Dive Compass, we design eco-friendly rash guards and scuba leggings that protect you — and the ocean — with every dive.

What to Wear Scuba Diving: Rash Guard vs. Wetsuit

Both rash guards and wetsuits serve as protective layers — but they're designed for different water conditions.

Rash Guards

• Best for: Warm water dives, snorkeling, freediving, and layering under wetsuits.
• Material: Lightweight, quick-drying recycled polyester or nylon blends.
• Purpose: Sun protection, sting protection, and coral scrape protection.

Rash guards are perfect as a dive skin in warmer tropical waters where a wetsuit might feel too warm and bulky. They're sleek, flexible, and comfortable — keeping you protected from jellyfish, hydroids, sea lice, and coral scrapes while still allowing full range of motion. And The Dive Compass has some of the most vibrant ocean-inspired prints on the market to show off your love for the sea.

Wetsuits

• Best for: Cooler or deeper dives where body heat loss becomes a concern — or for those who tend to run cold.
• Material: Neoprene.
• Purpose: Thermal insulation by trapping a thin layer of water against the skin.

Wetsuits shine when water temperatures drop below 25°C (77°F). The thicker the neoprene, the more insulation — but that can also mean less flexibility and more effort getting in and out.

Layering: The Perfect Combo for Any Dive

One of the smartest — and most overlooked — dive hacks is layering your rash guard under your wetsuit. Here's why:

• ✅ Easier to put on your wetsuit — The smooth, quick-dry material helps your wetsuit slide on effortlessly, even when your skin is damp.
• ✅ Extra protection — Adds a soft barrier between your skin and neoprene, reducing chafing and irritation. Especially recommended when wearing rental wetsuits or if you have sensitive skin.
• ✅ Versatility — When surface temperatures rise or you're diving in shallower, warmer water, you can ditch the wetsuit and wear just your rash guard and leggings as a standalone dive skin.

At The Dive Compass, our Scuba Leggings and UPF 50+ Rash Guards are designed to work both ways — as standalone protection in warm water, or as a smooth second-skin base layer under your wetsuit.

Why UPF 50+ Divewear Protects You and the Reef

Sun protection is essential for divers — especially between dives or while on the surface. But here's the catch: most sunscreens, even those labelled reef-safe, can still wash off and release chemicals that harm coral.

Choosing UPF 50+ clothing eliminates the need for sunscreen on covered areas, helping keep toxic chemicals like oxybenzone and octinoxate — two major coral-bleaching culprits — out of the sea.

UPF 50+ divewear:

• Blocks 98% of harmful UV rays.
• Keeps your skin protected above and below water.
• Prevents sunscreen runoff from entering fragile marine ecosystems.

Our rash guards and leggings are made from recycled polyester — transforming post-consumer plastic waste into high-performance divewear that safeguards both your skin and the sea.

Matching Divewear to Water Temperature

A personal note: I've found that wetsuit thickness ratings are almost always optimistic — my 5mm is rated to 21°C, but I'd never dive in temperatures that cold in just a 5mm. As someone who tends to run cold (a small woman dive pro speaking from experience!), here are my more honest recommendations:

Water TemperatureRecommended Gear28°C+ / 82°F+Rash guard + scuba leggings, or 3mm wetsuit if you tend to get cold. (I still wear a 5mm but most people think that's too much!)25–28°C / 77–82°FShorty wetsuit or rash guard layered under a 3mm wetsuit. (5mm if you run cold.)21–25°C / 70–77°F5–7mm wetsuit with a rash guard base layer. (Semi-dry if you get cold easily.)Below 21°C / 70°FDrysuit or 7mm+ semi-dry wetsuit with a thermal rash guard underneath.

Dive Smart. Protect the Ocean.

Choosing the right divewear isn't just about comfort — it's about making choices that align with your love for the sea. By wearing The Dive Compass recycled UPF 50+ rash guards and leggings, you're reducing plastic waste, cutting down on harmful sunscreen use, and helping fund coral restoration and ocean conservation.

Every purchase plants a coral through our Save Our Seas Pledge — and every piece you wear is made to order, minimizing waste and overproduction. Because sustainability doesn't stop at the surface.

💙 Dive sustainably. Protect the ocean. Stay wild, stay free. 💙