90″ x 90″ Hot Tub Cover
Premium 90-inch by 90-inch replacement hot tub covers, in stock and ready to ship from our Ontario facility within 5-7 business days.
90″ x 90″ Is a Large Standard Size
The 90″ x 90″ size fits larger 6-to-8 person spas. Common matches are listed in the manufacturer-verified section below — and note that many large spas people assume are 90″ actually measure 89″, 91″, or 100″, so the tape measure decides.
Always measure outside-to-outside on your spa shell. See our measurement guide.
Which hot tubs use a 90″ × 90″ cover?
According to the manufacturer’s current specifications, this model measures a true 90″ × 90″:
- Hydropool: Signature 779 Platinum
An 89″ × 89″ spa can also take this cover for a slightly roomier fit — see the 89″ × 89″ page for those models. The reverse is not true: never order a cover smaller than your shell.
Sizes above are the manufacturers’ current published footprints (rounded-feet labels like “7′ × 7′” are shown in inches). Model years vary and shells get redesigned, so before ordering: measure your shell outside-to-outside and check your corner radius against the option list — our measuring guide takes about 15 minutes. Not a match? Request a custom quote and someone from our team will confirm every spec in writing.
In Stock: 90″ x 90″ Configurations
- 90″ x 90″, 6″ corner radius, 5″ skirt, Black DuraTex, Black Vinyl, Charcoal Vinyl, or Chocolate Vinyl
If your 90″ x 90″ spa has a different corner radius, request a custom quote.
What’s Included
- Heavy-duty marine-grade vinyl or DuraTex exterior
- High-density EPS foam core
- Heat-sealed vapor barrier
- Double-stitched reinforced seams
- Four locking safety straps
- Reinforced lift handles
- Full perimeter skirt
- 3-year limited warranty
Why Bigger Covers Need Extra Attention
Larger covers like 90″ x 90″ carry more weight and stress at the hinge. Imperium’s reinforced seams and full perimeter skirt are designed to handle the additional load. If you’re in a heavy-snow region, consider the 6-to-4 inch taper for better snow shed (available as custom).
Ready for a Cover That Lasts?
Premium materials standard. 3-year warranty. Free shipping across most of Canada.