Inflatable Boat vs Fibreglass Boat: Which Actually Suits Australian Boating?

Short answer: a fibreglass runabout wins on offshore ride quality and fit-out. An inflatable catamaran wins on everything that decides whether the boat actually gets used — storage, launching, running cost and where you can beach it.

Most Australians buying their first "proper" boat compare a 4–5 m fibreglass runabout against an inflatable. They are very different ownership experiences, and the honest answer depends on where you launch and where the boat lives between trips.

The five differences that actually matter

1. Where the boat lives

A fibreglass runabout needs a registered trailer and a driveway, carport or paid storage. An inflatable catamaran deflates into two bags and lives in a garage corner, a shed or the back of a wagon. No trailer registration, no marina berth, no monthly storage bill.

2. Where you can launch

Fibreglass needs a ramp. That means queues, ramp fees, tide windows and reversing a trailer. An inflatable launches off sand, grass, a riverbank or a ramp — two people can walk a Viper 330 down a beach on wheels.

3. What it costs to own

Purchase price is only part of it. Over five years a fibreglass rig adds trailer rego, trailer servicing, bearings, tyres, antifoul or wash-down, and higher insurance. Our full breakdown is in Tinny vs Inflatable Boat: the true cost of ownership — the same maths applies to fibreglass, only steeper.

4. Ride and dryness

This is where fibreglass earns its money. In a 1.5 m short chop offshore, a deep-vee fibreglass hull is more comfortable than any inflatable. Inside the bar, in estuaries, on lakes and in coastal bays, an inflatable catamaran is drier and far more stable at rest because the load sits between two buoyant hulls.

5. Damage and repair

A fibreglass hull cracks and gelcoat chips; repairs go to a shop. A welded VALMEX hull takes an oyster rack scrape that would gouge gelcoat, and a puncture is a field repair with glue and patch. Our hulls use 1.2 mm VALMEX Heavy Plus (1500 GSM) with a 10–12 year fabric service life.

Head to head

Which boat suits which owner

Buy fibreglass if

You fish 20+ nm offshore most weekends, you already have somewhere to park a trailer, and you want a permanent fit-out with a hard-mounted sounder, live well and rod lockers.

Buy an inflatable catamaran if

You launch off beaches or banks, you have no room for a trailer, you want to fish, dive, crab or run the family without a ramp queue, and you want the whole thing to fit in a garage in ten minutes.

The boats we would put against a fibreglass runabout

• Aerowave WaveRunner 380 Series 3 — A$4,680. Full package with Bimini, pump and wheel kit. The best value entry into a 3.8 m catamaran.
• Aerowave Viper 365 Open Bow — A$5,595. Open bow for casting, crab pots and dive gear.
• Aerowave Viper 400 Sovereign — A$6,970. Our closest answer to a small fibreglass runabout: 4 m, huge deck, offshore-capable inshore and coastal.

All boats include free delivery Australia-wide and a 7-year hull warranty. Compare the range side by side on the boats page, or read the 2026 buying guide.

Running costs, five years

A 4 m inflatable with a 15 hp four-stroke burns a fraction of the fuel of a 5 m fibreglass hull with a 90 hp, needs no trailer maintenance, and carries no ramp or storage fees. For most weekend owners that difference is thousands of dollars a year — before you count the trips you actually take because the boat is easy to launch.

Our honest position

We build inflatable catamarans, so of course we are biased. But we tell people the truth: if your boating is genuinely offshore in rough water every weekend, buy fibreglass. If your boating is estuaries, bays, lakes, islands, crabbing, diving and family days on the water — the inflatable will get used far more often, cost far less to own, and never sit unused because it was too hard to hitch up.

Not sure which size? Read the size guide or talk to us before you buy.