The average bus between Portsmouth and Mersea Island takes 15h 6m and the fastest bus takes 13h 57m. The bus service runs several times per day from Portsmouth to Mersea Island. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run twice daily between Portsmouth and Mersea Island. The earliest departure is at 4:10 PM in the afternoon, and the last departure from Portsmouth is at 8:10 PM which arrives into Mersea Island at 10:07 AM. All services require a transfer at Heathrow Central Bus Station and take an average of 15h 6m. The schedules shown below are for the next available departures.
Arrives next day




15h 4m • 4 changes
Arrives next day




13h 57m • 4 changes
Arrives next day




14h 19m • 4 changes
Arrives next day




13h 57m • 4 changes
Want to know about travelling from Portsmouth to Mersea Island? 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 bus from Portsmouth to Mersea Island. However, there are services departing from Portsmouth station and arriving at Mersea Island station via Heathrow Central Bus Station station. The journey, including transfers, takes approximately 15h 6m.
Portsmouth to Mersea Island bus services, operated by National Express, depart from The Hard Interchange station.
Portsmouth to Mersea Island bus services, operated by National Express, arrive at Coach Station.
The distance between Portsmouth and Mersea Island is 179.2 km. The road distance is 265 km.
You can take a bus from The Hard Interchange to High Street via Heathrow Central Bus Station, Coach Station, Bus Interchange, Osborne Street, and Town station in around 6h 26m.