Seaton is a village on the south coast of Cornwall, England, at the mouth of the River Seaton 3.8 miles east of Looe and ten miles west of Plymouth. The village is in the civil parish of Deviock. The village stretches inland along the River Seaton valley. It has two pubs, a beach café. Seaton beach is mostly shingle and stretches from the river to the village of …Seaton is a village on the south coast of Cornwall, England, at the mouth of the River Seaton 3.8 miles east of Looe and ten miles west of Plymouth. The village is in the civil parish of Deviock. The village stretches inland along the River Seaton valley. It has two pubs, a beach café. Seaton beach is mostly shingle and stretches from the river to the village of Downderry a mile to the east.