Southwold is a small town on the North Sea coast, in the Waveney district of the English county of Suffolk. It is located on the North Sea coast at the mouth of the River Blyth within the Suffolk Coast and Heaths Area of Outstanding Natural Beauty. The town is around 11 miles (18 km) south of Lowestoft, 29 miles (47 km) north-east of Ipswich and 97 miles (156 km) north-east of London. It is within the parliamentary constituency of Suffolk Coastal.