85 x 85 Hot Tub Cover — Size, Fit and 51 Spas That Take It

A hot tub measuring 85" × 85" takes the AIRCAP 1™ Small, which fits square spas 83–85". 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 85" × 85"?

51 of the 1093 models in our Spa Fitter measure 85" × 85", across 11 brands. If yours is on this list, the size question is settled — click through for its own page.

Brand	Models measuring 85" × 85"
AquaLife Spas	Adulation, Annapolis, Destination, Grand Banks, Narada Harmony, Narada Harmony LS, Osprey Harmony LS, Osprey LS, Sutherland LS (Niagara LS)
Aquavia Spa	Aqualife 7, Essence, Essence Aurora, Feel, Mallorca (2020 and later), Menorca, Nice, Pulse, Soft, Soft Aurora, Touch 5, Touch 5 Pro
Arctic Spas	Cub, Eagle, Glacier (2007–2019), Midnight Sun (2011–2016), Totem, Yukon
Bueno Spa	New York, Vista
Evolution Spas	Destination, Essence 72, Highlands (Hampton 90, Manhattan 55), Impression 85, Reserve (Paradise 56, Key West 50)
Icelandic Hot Tubs	Fjord, Fontana, Soluna
Luxury Spas USA	Galley, Infinity (Estes LS-594), Savannah (WS-692), Victoria
Marquis Spas	Destiny
QCA Spas	Gemini (2024 and later, formerly E650, M670), Pisces (2024 and later, formerly E550)
Vita Spa	Nuage
Wellis Spas	Atlas, Hercules, Hercules PRO, Makalu Life, Mandala, Venus

That makes 85" the 9th most common of the 18 square footprints in the Spa Fitter (51 of 1093, 4.7%); the most common is 84" × 84" with 257. Next door, 84" × 84" lists 244 (plus 13 that round up) and 86" × 86" lists 24 (plus 6 that round up). No near-square model rounds up to 85"; every spa above is printed at exactly that. Aquavia Spa builds more at this size than anyone else — 12 of the 51; its other 13 square models sit at 78" × 78", 83" × 83", 87" × 87", 91" × 91", 92" × 92".

What if my spa is not exactly 85"?

85" (215.9 cm) is the largest square the Small is rated for. Half an inch more rounds up to 86" and takes the Medium instead, so measure carefully at this size.

The Small covers everything from 83–85" across, so you do not need to hit 85" 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: 83" × 83" · 84" × 84" · 86" × 86". Every size from 77" to 94" has its own page, listed on the Spa Fitter.

What an 85" × 85" cover costs

The AIRCAP 1™ Small 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 85" x 85" hot tub?

An 85 inch square hot tub takes the AIRCAP 1 Small, which fits square spas 83 to 85 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 85" x 85"?

51 models in our Spa Fitter measure 85 by 85 inches across 11 brands (AquaLife Spas, Aquavia Spa, Arctic Spas and 8 others). Each one has its own page listing the cover size it takes.

Is 85 inches the largest spa a Small fits?

Yes. The Small is rated for square spas 83 to 85 inches across, so 85 is its upper limit. A cabinet that measures even half an inch over rounds up to 86 and takes the Medium.

How much does an 85" x 85" 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 85 inch cover costs the same as the smallest one we make.