We are in the last 2 weeks before we arrive for the first time in DL and CA. Being from the south where it is already 80 plus degrees, we want to know if it hot enough to swim or if any of the area pools are heated? We are staying at the Marriot Residence Inn near DL.
While we're in a weird weather pattern right now (rain in May?), normally, I'd say mid-late May is indeed swimming weather here in S CA. Upper 70s to low 80s would be typical for this time of year, though it can be warmer.