The beach is situated within the protected Southwest Alentejo and Vicentine Coast Natural Park.
It is specifically formed by the accumulation of sand at the Mira River estuary, creating a river beach rather than a traditional open-ocean beach.
The landscape is defined by Miocene-era sedimentary cliffs that are prone to natural erosion.
The water temperature at Furnas Beach is generally warmer than the open Atlantic beaches due to the shallower depth and sun-warmed river water.
The ferry service connecting the beach to the town is a traditional method of crossing the Mira River dating back many decades.
Furnas Beach is located on the north bank of the Mira River estuary in the Alentejo region, directly across from the town of Vila Nova de Milfontes. The beach is characterized by its unique geographical position at the confluence of the river and the Atlantic Ocean, resulting in a mix of freshwater and saltwater swimming conditions. The shoreline is composed of fine golden sand and backed by dramatic, eroding clay cliffs. It is accessible primarily by boat or ferry during the summer months from the main pier in Vila Nova de Milfontes. The beach provides calm, sheltered waters due to the river sandbar, making it distinct from the more turbulent Atlantic beaches on the western side of the cliffs. The area is part of the Southwest Alentejo and Vicentine Coast Natural Park. During low tide, a wide expanse of sand connects the river beach to the outer coastal dunes.
The top of the cliffs looking back toward the estuary mouth and the town of Vila Nova de Milfontes.
Check the tide tables before visiting to ensure you have maximum beach space and to avoid being trapped near cliff edges.
Bring water and supplies, as there are limited facilities on the beach compared to the main town across the river.
Use the local ferry service for a scenic entrance and to avoid the long walk via the bridge.
Attempting to swim across the river current during high tide is dangerous due to strong tidal flow.
The ferry service operating between Vila Nova de Milfontes and Furnas Beach typically runs only during the summer season.
Respect protected dune areas by using established paths; carry out all trash to preserve the natural park environment.
