The Nothe Fort in Weymouth, Dorset, was built in the 1860s by the British government to protect Portland Harbour and the naval base from potential enemy invasion—particularly from the French under Napoleon III.
🏰 Why was Nothe Fort built?
🇫🇷 Fear of a French Invasion
During the mid-19th century, tensions were rising between Britain and France. Although there was no declared war, France was rapidly building up its navy under Emperor Napoleon III. Britain feared a surprise naval attack, especially along the south coast.
⚓ Portland Harbour’s Strategic Importance
Portland Harbour was being developed into a major Royal Navy base, thanks to its deep waters and sheltered location. It needed strong defences.
- The Nothe Peninsula offered a perfect elevated spot to build a fort to guard the harbour entrance, alongside nearby Portland and Weymouth.
🔨 Construction Facts
- Built between 1860 and 1872
- Designed to mount heavy guns facing out to sea
- Part of the Palmerston Forts—a series of coastal defences built across Britain under Lord Palmerston’s government
💣 Role in Later Conflicts
- It was updated during both World Wars with anti-aircraft guns and observation posts
- Used as a command post, barracks, and ammunition storage
- Played a key role in the defence of the Dorset coast during WWII
🕰️ Today
Now a heritage site and museum, Nothe Fort offers visitors a deep dive into military history, with tunnels, cannons, exhibitions, and panoramic views over Weymouth Bay.