Here are some things I didn’t know about pools until recently. The unheated pool temperature will be an average of the daytime and nighttime temp. So even if temps soar into the 80s, if they’re dropping to 50s at night (which is possible here, and lately we’ve been more early 70s and sometimes 40s at night) that means the pool is way too cold to swim in during the day at about the 60s. Brrr. Heating a pool is mad expensive if you do it all the time, so most folks do it on special occasions. My grandmother has a pool and even though she’s been in her house in Rancho Mirage (by Palm Springs) for 15 years I’ve literally been in the pool twice.