It may be unfair of me to pick three words that define all of Portugal, since I only visited a tiny part of the northern coast, so I’ll say that the following three words define the coastal resort areas of Portugal:
Sunny: Practically perfect weather, mid-eighties during the day with gentle breezes and in the 70’s at night. Sleeping with the doors and windows flung open.
Seafood: Best I ever had
Easy: Very laid back, comfortable, relaxing