I think the pool is advertised as heated, but it may not be heated all year - november is low season in mainland spain and many hotels in the area do not heat thier pools outside of the main summer season - don't know if the same applies to resorts like dona lola, you woudl need to check with them.
you should be ok to call them, as many staff are english and all the spanish ones we met during our stay spoke excellent english.
even if the pool is heated, it will feel cold in november - the pool is right by the beach and even a slight breeze will chill the water surface, and the weather can be decidedly chillly at that time of year. We were there in late august 2 years ago and the pool was empty except for a few hardy kids (and they didn't stay in long!), wheras we have been to other resorts in the same area at the same time of year and experienced lovely warm pools - but they were more sheltered .
that said, unless you have kids who want to spend all thier time in the water you will be fine - the pool is deep all along its length and is great for swimming in.
theree is also an indoor pool in the leisure centre which is heated. we didn't use it but in looks ok.