Why Do Wetsuits Lose Warmth?
Lauren May 14th, 2025 Posted In: Articles
Wetsuits are a surfer’s, diver’s, and paddler’s best friend — designed to keep you warm by insulating your body in chilly waters. But over time, many notice something strange: the same suit that once felt like a personal heater doesn’t feel quite as toasty anymore. So, why do wetsuits lose warmth? The answer comes down to wear and tear, compression, and material breakdown.
Just like with most things in life, wetsuits naturally lose warmth over time due to factors like neoprene degradation, frequent use, exposure to UV rays, and improper care. But don’t worry, we’ll dive deep into what causes the decline in insulation, how wetsuits actually keep you warm, and what you can do to preserve that warmth for as long as possible!
How Wetsuits Keep You Warm
Before understanding why wetsuits lose warmth, it’s helpful to know how they work. Wetsuits are typically made of neoprene — a synthetic rubber that traps a thin layer of water between your skin and the suit. Your body heats that water, creating an insulating barrier that helps maintain your core temperature. So, the thicker the neoprene, the more insulation it provides. In addition, modern wetsuits often include types of wetsuit seams like sealed seams as well as thermal linings. They even offer smooth skin panels that enhance heat retention.
But this warmth relies on the neoprene’s structure staying intact. When that structure begins to degrade or compress, the suit loses its ability to trap and retain heat effectively. And that might become a big no-no for you!
Why Do Wetsuits Lose Warmth Over Time?
The warmth loss in wetsuits isn’t sudden — it’s gradual and tied to multiple causes. Here’s a breakdown of why wetsuits lose warmth:
- Neoprene Compression: Every time you wear and use your wetsuit — especially for diving or deep water activities — the neoprene compresses. Over time, repeated compression flattens the material, reducing its insulating air pockets and overall thickness.
- Wear and Tear: Constant bending, stretching, pulling on and off, and water friction all wear down the neoprene’s flexibility and insulation capacity.
- UV and Sun Damage: Exposure to sunlight and UV rays can dry out neoprene, making it brittle and less effective at trapping warmth. This is especially true for wetsuits that are regularly left out to dry in direct sunlight.
- Saltwater and Chlorine: Repeated exposure to salt and pool chemicals breaks down neoprene and internal linings. Without proper rinsing, these elements slowly degrade your suit.
- Poor Storage and Care: Folding your wetsuit instead of hanging it, or storing it in hot environments like a car trunk, can warp or damage the material.
Each of these factors chips away at your wetsuit’s warming abilities. Combine a few, and your once-reliable wetsuit starts to feel a little chilly. Interested in tending to your wetsuit properly to make it last? Discover our wetsuit care and repair tips!
Signs Your Wetsuit Is Losing Warmth
Not sure if your wetsuit’s insulation is on the decline? Look out for common signs such as feeling colder faster during your sessions, the neoprene starts feeling thinner or “spongy” in certain areas, your suit takes on water or has frequent flushes, the seams are coming apart or are no longer sealed, and lastly, you notice any visible cracks, holes, or thinning spots!
If you’re noticing any of the above, it may be time to either repair or replace your wetsuit. If you’re wondering when exactly to upgrade, our post on how long wetsuits last has a helpful breakdown.
Can You Make a Wetsuit Warmer?
If your wetsuit’s warmth is declining but it’s not quite ready for retirement, there are a few tricks to help you stay warm:
- Layer Up: Add a wetsuit vest, hooded vest, or thermal rash guard underneath.
- Use Accessories: Booties, gloves, and hoods can help retain body heat, especially in cold water.
- Hot Water Prep: Pouring warm (not boiling!) water into your suit before entering cold water can help your body acclimate faster.
- Seal Leaky Areas: Wetsuit repair kits or neoprene cement can patch small holes or reinforce seams.
Just remember, these hacks won’t restore lost neoprene thickness — they’ll just help you manage the cold a bit better.
How to Keep Your Wetsuit Warm as Long as Possible
Prevention is key when it comes to wetsuit longevity. A little extra care can go a long way toward preserving your suit’s insulating power!
Here are some smart habits to keep in mind:
- Rinse With Fresh Water After Every Use: Salt, sand, and chlorine all break down neoprene. A thorough rinse helps prevent buildup.
- Dry in the Shade: Always hang your wetsuit in a shaded, well-ventilated area to dry. Avoid direct sunlight, which can damage the fabric.
- Use a Proper Hanger: Wetsuits should be hung on wide hangers or draped at the waist to avoid stretching out the shoulders.
- Store in a Cool, Dry Place: Never leave your wetsuit in a hot car or stuffed in a bag for days.
- Avoid Harsh Chemicals: Only use wetsuit-safe cleaners if needed — regular detergents are too harsh.
Following these care tips can extend the warmth and lifespan of your suit — keeping you comfortable in the water for more seasons.
Is It Time for a New Wetsuit?
Even with the best care, all wetsuits eventually lose warmth. If yours is beyond repair, upgrading to a new wetsuit with modern insulation and sealed seams might be your best bet. Wetsuit technology has come a long way — from improved neoprene blends to innovative linings that reflect body heat.
If you’re shopping for a replacement, check out our wetsuit buying guide (for beginners and beyond) for help choosing the right suit based on your water activity, temperature needs, and fit preferences.
Staying Warm, Staying Smart
So, why do wetsuits lose warmth? It all boils down to material breakdown, compression, and regular exposure to sun, salt, and wear. While wetsuits aren’t invincible, they can stay warm and effective for years with the right care. And when it’s time for a new one, choosing the right wetsuit with the right thickness, fit, and features makes all the difference.
Whether you’re diving into icy waters or catching waves in the early morning chill, your wetsuit’s warmth is key to enjoying every session. Treat it well, and it’ll return the favor!
