How it surfs
The Seaside is arguably the most influential board of the last five years — the design that pulled twin fins back into everyday surfing after decades of thruster dominance. Retailer and editorial reviews line up on the same conclusion: it paddles far better than its length suggests, generates its own speed on weak faces, and feels drifty-loose off the tail without washing out.
Where the Seaside stops working is in punchy, vertical surf. Above head-high the twin setup loses hold, and reviewers repeatedly recommend the Sunday, Mashup or a proper shortboard once the waves get real. Below head-high, it is the board almost every reviewer picks first.
Volume & sizing chart
Use the chart below as a starting point. Add half a litre if you are less experienced, subtract half a litre for a looser feel.
| Size | Volume | Rider weight | Best for |
|---|---|---|---|
| 5'4" | 27.9 L | 55–65 kg | Advanced |
| 5'6" | 29.5 L | 60–70 kg | Intermediate+ |
| 5'7" | 30.7 L | 65–75 kg | Intermediate |
| 5'8" | 32.1 L | 70–80 kg | Intermediate |
| 5'10" | 35.2 L | 80–90 kg | Improver |
| 6'0" | 39.5 L | 90+ kg | Improver |
How it compares
| Board | Best at | Wave range | Aggregate score |
|---|---|---|---|
| Firewire Seaside | Small-wave speed | Ankle to shoulder | 9.0 |
| Channel Islands Happy Everyday | All-round shortboard | Knee to overhead | 8.9 |
| Lost Rad Ripper | Punchy small-wave groveler | Waist to shoulder | 8.6 |
| Pyzel Ghost | Step-up in powerful surf | Head-high to double-overhead | 8.8 |
Recommended fin setups
- Futures Machado Keel — The default. Drivey, classic twin feel.
- Futures AM1 Twin + Trailer — Adds hold when the wave has a bit more push.
- Futures Kolohe Twin — Looser, more skatey for weak beach breaks.
Verdict
Across five independent retailer and editorial reviews, the Seaside averages one of the highest aggregate scores of any modern twin fin. It is the board most commonly recommended if your local waves rarely get above head-high — few designs make weak surf as consistently fun.