Thank you to everyone who took the time to respond. I am postponing Portugal to May and now am wavering between Greek isles and southern France. I'd appreciate all your thoughts and advice. Details in my post below.
I like to go to southern Europe in February-March when the crowds are less, the weather is not hot, and the prices are low season. In recent years I've been to Spain and Italy several times. I was all set to go to Portugal in March. Friends of mine were there 3 years ago and said it the weather was perfect. I just looked at historical weather data for the last 5 years in Lisbon and Porto and it would seem that they hit an unusually warm year. In all the other years, highs were around 10-15 nearly the whole month. May didn't seem to be very hot, only a few days with highs of 30-31 and not every year. So now I think I'll wait and go in early May. April is a non-starter for personal reasons.
My first question: is that a good decision?
Next, I don't want to wait SIX MONTHS for my next trip. So I' thinking about a 7-10 day trip somewhere in February or March . . . thoughts? Somewhere that isn't expensive. How's the weather in the south of France?