Sit-On-Top Kayak Seat Upgrade
How to Upgrade a Sit-On-Top Kayak Seat
DIY raised seat builds and aftermarket high-back seats compared for upgrading a sit-on-top kayak, with real costs and which fixes which problem.
Sit-on-top kayaks have a well-known seating flaw baked into the design: the molded seat well sits at or below the waterline of any water that gets on deck, so it pools right where you sit. A cushion, which we cover separately, adds padding but doesn’t solve that pooling problem. A seat upgrade, raising you off the wet seat pan entirely, does.
This is the Seating & Comfort entry in our kayak fishing accessories guide. If your seat’s own hardware has actually failed rather than needing a comfort upgrade, see our Lifetime kayak seat replacement guide instead. If padding alone would solve your problem, our kayak seat cushion guide is the lighter, cheaper fix.
Key Takeaways
- Sit-on-top kayaks pool water directly in the seat well, since it sits at or below deck level; a raised seat solves this, a cushion alone doesn’t.
- A DIY raised-seat build, using a bass boat seat, aluminum brackets, and a wood platform cut to the hull’s contour, can cost well under $100, per Kayak Angler’s documented build.
- Aftermarket high-back seats (the GTS product line is a common example, with backs up to 18 inches tall) typically run in the $300 range for a complete seat.
- A raised seat also improves visibility for sight-fishing and paddling posture, not just dryness, since it lifts your eye line and straightens your back angle versus sitting low in a molded well.
- Check your kayak’s specific seat-well dimensions before buying or building, since mounting points and well depth vary by model.
Jump to a section:
- Why Sit-On-Top Seats Need Upgrading
- Upgrade Options at a Glance
- DIY Raised Seat Build
- Aftermarket High-Back Seats
- What to Check Before You Buy or Build
- Who Should Choose What
- Frequently Asked Questions
Why Sit-On-Top Seats Need Upgrading
A sit-on-top kayak’s molded seat well is intentionally at or near deck level, part of what makes the design self-bailing and stable. The tradeoff is that any water on deck, from waves, rain, drips off a paddle, or bilge water working its way to the lowest point, pools directly where you sit. Kayak Angler describes this plainly: water “pools in the seating area and gets trapped there,” making long outings genuinely uncomfortable regardless of how padded the seat itself is (Kayak Angler).
A cushion adds comfort but sits at the same low level, so it gets wet along with everything else. The actual fix is raising the seat surface itself off the wet seat pan, which is what both options below do, at very different price points.
Upgrade Options at a Glance
| Option | Approx. Cost | What It Solves | Effort |
|---|---|---|---|
| DIY raised seat build | Well under $100 | Water pooling, low eye line | High (cutting, drilling, sealing required) |
| Aftermarket high-back seat (GTS-style) | ~$300 range | Water pooling, back support, posture | Low (bolts to existing mounting points) |
DIY Raised Seat Build
A DIY raised seat solves the water-pooling problem directly, for a fraction of an aftermarket seat’s cost. Kayak Angler’s documented build uses a bass boat seat (about $50), aluminum flat stock (1¼ x 3/16 inches) bent into mounting brackets, a piece of fir wood (1¼ x 4 inches) cut to match the kayak floor’s contour, and stainless hardware with marine sealant on any new holes. The builder traces the seat well’s contour onto the wood platform, mounts the raised seat on aluminum brackets through the kayak’s existing mounting hole, and reports a finished cost “well under $100” for a Ride 135 kayak, versus the roughly $300 aftermarket seats in the same category (Kayak Angler).
The tradeoff is effort and fit: this is a real build project requiring cutting, drilling, and sealing, and the wood platform has to be shaped to your specific kayak’s seat-well contour, not a universal fit.
Verdict: the best value by far if you’re willing to build it, and it directly solves the pooling problem an aftermarket cushion or standard seat doesn’t.
Aftermarket High-Back Seats
If you’d rather bolt on a finished product than build one, aftermarket high-back seats solve the same pooling problem plus add real back support. The GTS product line is a commonly cited example: the GTS Sport model has a 12.5-inch back, and the GTS Elite steps up to an 18-inch back for maximum support, both using thermoformed foam panels and PVC-reinforced backing, with a universal detachable cargo pack. Complete aftermarket seats in this category typically run in the $300 range.
Because these seats bolt to existing mounting points rather than requiring a custom-built platform, installation effort is far lower than the DIY route, at roughly triple the DIY build’s cost.
Verdict: worth it if a finished, no-build product matters more to you than saving money, and the taller-back options add real postural support the DIY build doesn’t specifically address.
What to Check Before You Buy or Build
Before committing to either option, confirm your kayak’s specific seat-well width, depth, and existing mounting hole locations, since both a DIY platform and an aftermarket seat depend on that fit. A seat riser that sits too high can also affect your kayak’s center of gravity and stability, so if your kayak is already on the tippier side, pair a seat upgrade with a stability check, or consider outriggers if raising your seating position pushes stability past your comfort level.
Who Should Choose What
Comfortable with a real build project and want the best value: The DIY raised-seat approach solves the actual pooling problem for a fraction of an aftermarket seat’s price.
Want a finished product with maximum back support and no build effort: An aftermarket high-back seat like the GTS Elite adds real postural support on top of solving the same water problem, at roughly triple the DIY cost.
Your seat’s hardware has actually failed, not just gotten uncomfortable: That’s a different problem. See our Lifetime kayak seat replacement guide for repair and hardware fixes.
Padding alone would solve your comfort issue, and pooling water isn’t the problem: A seat cushion is the lighter, cheaper fix.
Frequently Asked Questions
Why does my sit-on-top kayak seat always get wet?
The molded seat well on a sit-on-top kayak sits at or near deck level by design, which is part of what makes the hull self-bailing and stable. Any water that gets on deck pools directly in that well, which is why a seat riser or raised seat, not just a cushion, is the actual fix.
Is a DIY seat riser as good as an aftermarket seat?
For solving the pooling problem specifically, yes, both raise you off the wet seat pan. An aftermarket seat like the GTS Elite adds more structured back support than a basic DIY build, but at roughly three times the cost, per the documented comparison of a sub-$100 DIY build versus $300-range aftermarket seats.
Will raising my kayak seat make it less stable?
It can, since raising your seating position raises your center of gravity. Check your kayak’s stability margin before committing to a seat riser, and consider whether outriggers make sense if the added height pushes stability past what you’re comfortable with.
Do I need to modify my kayak’s hull to install a raised seat?
A DIY build typically mounts through the kayak’s existing seat-mounting hole rather than requiring new hull penetrations, per Kayak Angler’s documented build. Aftermarket seats are designed to bolt to existing mounting points as well. Confirm your specific kayak’s mounting hardware before buying or building.
How This Guide Is Researched
OutdoorIdol’s gear guidance is built from manufacturer specifications and published outdoor-publication reporting, not paid placement. The DIY build details and its cost comparison against aftermarket seats come primarily from a single source, Kayak Angler’s documented build, since it was the most detailed source found for that specific comparison; GTS seat specifications (back height, foam/PVC construction) come from manufacturer and retailer product listings, though we could not verify a current price directly from GTS’s own site in this research pass. We do not claim hands-on testing we haven’t done. See our about page for how these guides are written and by whom.
Conclusion
A sit-on-top kayak’s seat well pools water by design, and neither ignoring it nor adding a cushion actually fixes that. A DIY raised-seat build solves the problem for well under $100 if you’re willing to build it; an aftermarket high-back seat solves the same problem plus adds real back support for roughly triple the cost. Either way, confirm your kayak’s seat-well fit and stability margin before committing.
