How do I stop my surfboard delaminating in hot weather?

Keep it out of closed vehicles and out of direct sun. Heat expands the air inside the foam faster than the glass can move, which is what separates the two. A rinse in fresh water and a dry in the shade after every session, plus fixing dings the same week, covers nearly all of it.

Should I rinse my board after every surf?

Yes, with fresh water, and pay attention to the fin boxes and the leash plug where salt collects. Then dry it in shade rather than in the sun, and do not put it away wet in a closed bag.

How long does a surfboard last?

It depends on heat far more than on hours surfed. A board kept in shade, rinsed and repaired promptly can be surfed for years. The same board left in a hot car a few times can delaminate in a season, and once water is in the foam it is not economic to fix.

Looking after a board in the tropics

Heat does more damage to a surfboard here than surfing does. What the sun, the salt and a hot car actually do to a board, and the small habits that decide what it is worth in three months.

Updated September 2026 · 3 minute read

The sun is the problem, not the waves

Most boards on this island are not worn out by being surfed. They are cooked. A board left on a bike, on a roof rack or on hot sand expands the air inside the foam faster than the glass around it can move, and that is where delamination starts. A board that lives in the shade and gets rinsed will outlast an identical board that does not by years, on the same number of sessions.

This matters commercially as well as practically. Delamination and water in the foam are the two things that take a used board's price to almost nothing, and both of them are heat and neglect rather than accident.

The habits that actually matter

Never leave it in a closed vehicle: A car or a van in the sun here gets hot enough to lift glass off foam in an afternoon. This single mistake causes more delamination than everything else here combined. If the board has to wait, it waits in shade with air moving over it.
Rinse it, then dry it in the shade: Fresh water off the deck and through the fin boxes and the leash plug. Then shade. A board put away wet in a bag grows things and stays warm, and a board dried in full sun has just been given another hour of the thing that damages it.
Fix dings the same week: An open ding in warm water takes on water fast, and a board that has been surfed wet for a month may never dry out. A ding repair here is cheap and quick. A waterlogged board is not repairable at a price worth paying.
Keep it off its rails on concrete: Nose and tail take most transport damage. Stand it on a soft edge, or lay it deck up, and do not lean it somewhere the wind will take it over. Most cracked noses happened on land.
Wax for warm water, and strip it sometimes: Tropical wax, and take the old layer off every so often. A thick grey wax build up hides pressure dents and small cracks from you, which means you find them later than you should, and it makes the board look worse than it is when you come to sell it.

Storing a board between trips

Strip the wax, rinse it, and let it dry completely before it goes anywhere for months.
Loosen or remove the fins, so nothing is under load and no screw seizes in a humid box.
Store it flat or upright on a rail, not resting on the nose, and out of direct sun.
A board bag is for transport and shade. A board sealed in a bag in the heat for a season is worse off than one on a rack in a dark room.

If you are leaving the island and the board is staying, decide honestly whether you will be back for it. A board stored badly for six months can lose more value than it would have cost you to sell it and buy another one on the next trip.

Common questions

How do I stop my surfboard delaminating in hot weather?: Keep it out of closed vehicles and out of direct sun. Heat expands the air inside the foam faster than the glass can move, which is what separates the two. A rinse in fresh water and a dry in the shade after every session, plus fixing dings the same week, covers nearly all of it.
Should I rinse my board after every surf?: Yes, with fresh water, and pay attention to the fin boxes and the leash plug where salt collects. Then dry it in shade rather than in the sun, and do not put it away wet in a closed bag.
How long does a surfboard last?: It depends on heat far more than on hours surfed. A board kept in shade, rinsed and repaired promptly can be surfed for years. The same board left in a hot car a few times can delaminate in a season, and once water is in the foam it is not economic to fix.