Portugal is looking for a flat sea to enable it to open a commercial wave farm, the country's latest renewable energy initiative and the world's first such project, The Guardian has reported.

Due to bad weather, the venture has not been launched since the Pelamis machines necessary for the wave farm need a calm sea for their operation, the report said.

The machines constitute a series of interlinked tubes pointed in the direction of the waves. A hydraulic system harnesses the circulating motion of the waves to generate electricity. Thereafter, the electricity produced will be pumped into the national grid.

The machines were designed and built in Scotland by Pelamis Wave Power.