The climate is very mild. It rarely gets colder than 8 degrees Celsius or hotter than 35 degrees Celsius. It is a town where there are no "poor" areas, a town that is definitely prosperous.
There is always something going on in Zarautz. There are various sports competitions held ranging from world-class surfing contests to triathlons to folk dance competitions to cycling races.
Zarautz has lots of great festivals or "fiestas", the most popular of which are San Pelaio (St. Pelagius) and the Basque Festival (Euskal Jaia), held on June 26 and September 9, respectively. The Basque Festival is especially fun since everyone dresses up in Basque folk garb and there are various events held, including a town play which is performed on Munoa square.
Christmas is especially nice. One of the most impressive events is when they stage the arrival of the Three Wise Men (Erregeak or "Kings") in Zarautz on the night of January 5. They ride through the streets of Zarautz and throw candy and sweets at the kids.