86 x 86 Hot Tub Cover — Size, Fit and 11 Spas That Take It

A hot tub measuring 86" × 86" takes the AIRCAP 1™ Medium, which fits square spas 86–88". That is the whole answer — but measure your own spa before ordering rather than trusting the size of the cover you are replacing, because cabinets vary between model years and a cover bought to the wrong number is the most common ordering mistake there is.

Measure straight across the top of the cabinet, edge to edge, both ways. If the two numbers differ, use the larger one. If you land between two sizes, round up: an oversized cover overhangs by a fraction, which is how a spa cover is meant to sit, while an undersized one will not seal along the edges.

Which hot tubs are 86" × 86"?

9 of the 496 models in our Spa Fitter measure 86" × 86", across 5 brands, and 2 more round up to it (listed below). If yours is on this list, the size question is settled — click through for its own page.

Brand	Models measuring 86" × 86"
Luxury Spas USA	Marquis Hot and Cold Spa
Master Spas	Bar Harbor LE, Bar Harbor SE
PDC Spas	Reno
Viking Spas	Apex, Ascent
Wellis Spas	Lima, Malaga, Rental

Also rounds up to 86" × 86"

2 more models are not printed as an exact 86" square: one or both sides fall a fraction short. The rule is to round up, so they take the same Medium.

Brand	Rounds up to 86" × 86"
Hydropool Hot Tubs	Serenity 5900 (85.5" x 85.5", 0.5" short), Serenity 6800 (85.5" x 85.5", 0.5" short)

That makes 86" the joint 13th most common of the 18 square footprints in the Spa Fitter (11 of 496, 2.2%, level with 79" × 79" and 87" × 87"); the most common is 84" × 84" with 131. Next door, 85" × 85" lists 22 and 87" × 87" lists 11. Wellis Spas builds more at this size than anyone else — 3 of the 11; its other 13 square models sit at 79" × 79", 85" × 85", 91" × 91", 93" × 93".

What if my spa is not exactly 86"?

86" (218.4 cm) is the bottom of the Medium band: anything from 86" to 88" takes the same cover, while 85" and under takes the Small.

The Medium covers everything from 86–88" across, so you do not need to hit 86" exactly. Outside that band, the AIRCAP 1™ comes in six sizes spanning 77" to 94" — the two-measurement guide will place you, or you can look your model up directly in the Spa Fitter.

One limit worth stating plainly: these are covers for square spas. If your cabinet is round, octagonal or a rectangle, no size here will fit it, and the alternatives guide covers what will.

Nearby measurements: 85" × 85" · 87" × 87" · 88" × 88". Every size from 77" to 94" has its own page, listed on the Spa Fitter.

What an 86" × 86" cover costs

The AIRCAP 1™ Medium is $1,195 — the same price as every other size, including the pump, three Ziptech™ skirt depths and tie-down straps, with free shipping to all 50 states. There is no size surcharge, which is unusual in this category: most makers price a cover by its square footage, so a bigger spa costs more. For how that compares with foam and the other constructions, see what a hot tub cover costs.

It weighs 35–40 lb and, with no foam core to absorb water, never gains weight — the one number a foam cover cannot promise.

Frequently asked questions

What size cover fits an 86" x 86" hot tub?

An 86 inch square hot tub takes the AIRCAP 1 Medium, which fits square spas 86 to 88 inches across. Measure straight across the top of your cabinet both ways and use the larger number; if it falls between two sizes, round up.

Which hot tubs are 86" x 86"?

9 models in our Spa Fitter measure 86 by 86 inches across 5 brands (Luxury Spas USA, Master Spas, PDC Spas and 2 others), and 2 more round up to it. Each one has its own page listing the cover size it takes.

Is 86 inches the smallest spa a Medium fits?

Yes. The Medium covers square spas 86 to 88 inches across, so 86 is its lower limit; a cabinet of 85 inches or under takes the Small instead.

How much does an 86" x 86" hot tub cover cost?

The AIRCAP 1 is $1,195 in every size, including the pump, three Ziptech skirt depths and tie-down straps, with free shipping to all 50 states. There is no size surcharge, so an 86 inch cover costs the same as the smallest one we make.