Nothe Fort is a fort in Weymouth, Dorset, England, situated at the end of the Nothe Peninsula, which juts eastwards from the town of Weymouth, and Weymouth Harbour, into the sea to the north of the ex-military Portland Harbour. The fort is located next to Nothe Gardens.The coastal defence was built between 1860 and 1872 by 26 Company of the Royal Engineers to protect Portland and Weymouth Harbours, with Portland then becoming an important Royal Navy base.