If you are taking the hot tub, then such dream shows the necessity for relaxation. Perhaps you are trying to get away from your troubles and various issues in your waking life. The hot tub in a dream could also indicate the issues of your subliminal mind that has been opened.
Dream dictionary: Hot Tub dream meanings
…If the bathroom is nice, it indicates both physical and spiritual health, especially if the water is clear and transparent. If it’s cloudy, too hot or too cold, it indicates that something is wrong, but if it ends up being nice, we will get a profit. If the tub is empty or we do not get into it, that indicates missed opportunities….
If we are taking a bath we must take into account the feelings that bath produces in us. If the bath is nice and we see the clear, clean water, it bodes health and prosperity both material and spiritual. But if we do not take the bath because the tub is empty, or the water is dirty or hot or cold, almost all authors consider it as a notice of lost opportunity due to lack of foresight or the difficulty of adequately address the events.