The average train between Watford and Portsmouth takes 2h 31m and the fastest train takes 2h 9m. There is an hourly train service from Watford to Portsmouth. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run hourly between Watford and Portsmouth. The earliest departure is at 12:55 AM at night, and the last departure from Watford is at 10:48 PM which arrives into Portsmouth at 1:20 AM. All services require a transfer at London Euston and take an average of 2h 31m. The schedules shown below are for the next available departures.


2h 22m • 2 changes

2h 18m • 2 changes

2h 21m • 2 changes

2h 29m • 2 changes

6h 21m • 2 changes

2h 57m • 2 changes

2h 22m • 2 changes

2h 9m • 2 changes

3h 25m • 2 changes

2h 55m • 2 changes

2h 15m • 2 changes

2h 13m • 2 changesWant to know about travelling from Watford to Portsmouth? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct train from Watford to Portsmouth. However, there are services departing from Watford station and arriving at Portsmouth station via Portsmouth & Southsea. The journey, including transfers, takes approximately 2h 31m.
Watford to Portsmouth train services, operated by West Midlands Trains, depart from London Waterloo station.
Watford to Portsmouth train services, operated by West Midlands Trains, arrive at Portsmouth & Southsea station.
Book your Watford to Portsmouth train tickets online with West Midlands Trains, London Underground (Tube) and 2 other operators.
The distance between Watford and Portsmouth is 106.8 km. The road distance is 149 km.
South Western Railway operates a train from London Waterloo to Portsmouth & Southsea every 30 minutes. Tickets cost £29–65 and the journey takes 1h 31m.