Any suggestions for two active seniors? We are traveling with family.
Layers. It's likely to be warm during the day, but get chilly in the evenings.
Normal casual attire is fine.
Have a great time.
As Lin stated, it'll be warm in May however I disagree about the evenings being chilly. Certainly for Malaga the evening temperatures are usually in the high teens to early twenties and I'm still in shorts and polo shirts at that time. Granada is a bit cooler, probably mid to high teens so some people might prefer to wear a light jacket or sweater.
We stayed in Grenada for three nights this past weekend, and we were glad we had our sweaters and jeans. Overnight lows in the upper forty’s and daytime highs in the 60s. But then it’s a matter of perspective; we’re from Tampa Florida where it is already close to 90 every day in May.