You've finally found the Speedo goggles that fit: no leaks, no headaches, no raccoon eyes. Then a few weeks later they start fogging up mid-set, and the usual advice is to buy another pair. Hold that thought. Your goggles aren't broken, it's just the anti-fog!
The fog comes from the anti-fog layer inside the lens wearing off, and you can replace that layer without replacing the goggles. Clear anti-fog lens patches stick inside each lens and keep your favourite Speedos fog-free for months. Here's why the fog starts, what to check, and how to fix it.
Why Speedo goggles fog up
Fog is condensation: warm, humid air inside your goggles hits a lens cooled by the water. Anti-fog stops that moisture forming droplets you can't see through. Speedo explains on its own blog that how long the anti-fog lasts depends on the lens:
- On hard polycarbonate lenses, the anti-fog is a coating applied to the lens, and it can wear away with use.
- On softer cellulose acetate lenses, the anti-fog is built into the material.
Speedo also says goggles can outlast their anti-fog with regular use, and suggests a new pair if old or heavily used goggles fog. That's the part we'd push back on. If the strap, seals and lenses are still good, it's a lot of plastic to throw away over one worn-out layer.
And here's the kicker: Speedo also sells its own anti-fog spray for when the anti-fog on its goggles wears off. If the built-in anti-fog lasted, there'd be no spray to sell. In our experience, sprays barely last one session and often sting.
Quick checks before anything else
- Fit: if water is getting in, the inside of the lens gets wet and fogs faster. Adjust the strap and nose bridge first.
- Hands off the lens: wiping the inside with fingers, a towel or your cap strips anti-fog quickly.
- Residue: sunscreen, moisturiser and shampoo on your face or hands can transfer to the lens.
- Storage: goggles left wet in a kitbag age faster. Dry them and keep them in a case.
Speedo's care tips (worth following)
Speedo's goggle care advice is solid: rinse in fresh, lukewarm water after each swim, let them air dry, store them in a case, and don't use soap or detergent for everyday cleaning. Good care makes the anti-fog last longer. It won't make it last forever.
Fix the fog without buying new Speedos
FOG OFF! is a clear anti-fog patch that works on goggles of any brand, Speedo included. One size fits any swim goggle, and one application gives you 3+ months of fog-free swims (based on 3+ swims a week).
- Remove the old factory anti-fog. This is a one-off prep step: wash the inside of each lens with a little detergent and a clean microfibre cloth until the old film is completely gone, then dry it thoroughly. The patch won't stick or work properly over the old coating.
- Apply. Peel the RED tab, position the patch with the BLACK tab (nose side first), press firmly from the nose edge outward, then peel off the BLACK tab.
- Activate before each swim. Dip in water and gently rub the film. It reaches full strength over your first 2 to 3 swims.
Full step-by-step video: how to apply FOG OFF!
When it really is time for new Speedos
A new anti-fog layer can't fix a leaking seal, a snapped strap or a cracked lens. If that's what you're dealing with, here's when to replace swim goggles.
FOG OFF! isn't affiliated with or endorsed by Speedo. Speedo is a trademark of its owner, used here only to describe the goggles our patches fit.
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