Hi again, if I remember rightly, Jan and Feb were generally very dry and pretty settled. Sometimes it can be windy but it wasn't for the most part. March and April were more unsettled with clouds and wind interspersed with glorious days, though not wet, apart from the Easter weekend when it poured with rain for 4 whole days, the worst weather for Easter that they'd had for 50 years! Last year we had great weather in March and April!
Generally, if it does rain, it does it and then stops and the sun comes out again.
We also spent 5 weeks there in the summer 2 years ago and didn't find it too crowded or busy on the roads. Yes, the restaurants get busy but from around 9 to 9.30pm. Parking gets busy at the beach but park a couple of roads back or walk to the beach if you can. It's lively but good to see, in our opinion.