Erandio is situated in the northern part of Spain, in the Basque Country, within the province of Biscay. It lies on the left bank of the Nervión River, just a short distance from the city of Bilbao, making it part of the metropolitan area of Bilbao. This gives Erandio the advantage of being close to a major urban center while retaining a more laid-back, small-town atmosphere. The town is also near the coast, with the beaches of the Bay of Biscay just a short drive away, providing a scenic backdrop and easy access to seaside activities.
The climate in Erandio is classified as an oceanic climate, characterized by mild temperatures throughout the year. Summers are warm but not overly hot, with average temperatures around 20–25°C (68–77°F), making it a pleasant time to visit. Winters are cool and damp, with temperatures rarely dropping below 5°C (41°F). Rainfall is common, especially during the autumn and winter months, which keeps the region lush and green. The best time to visit is during late spring to early autumn, from May to September, when the weather is most favorable for outdoor activities and events.
Erandio’s location makes it easily accessible to several major natural landmarks, including the rugged Basque coastline, the nearby Urkiola and Gorbea natural parks, and the rolling hills that characterize the inland areas of the Basque Country. This diversity in the landscape offers visitors and event organizers a variety of scenic options for outdoor experiences.