Where is the nearest sea port to Hertfordshire UK?

The nearest sea port to Hertfordshire, UK, is likely the Port of Harwich, located about 70 miles to the east. Harwich serves as a significant ferry terminal and cargo port, providing access to various European destinations. Another option is the Port of Felixstowe, which is approximately 80 miles away and is one of the largest container ports in the UK. Both ports are accessible via road and rail from Hertfordshire.