Azureva Roquebrune-Cap-Martin (Bella Vista)
The pool. Heated covered pool, open year-round from 9 am to 10 pm, with a hot tub; closed in the 2nd and 3rd weeks of January (Azureva website).
The hot tub. Hot tub in the pool area.
I haven't yet found guest reviews that mention the water temperature.
Guide's tip. The pool closes for two weeks in January: avoid those dates.