Is there a direct train?

No, you must change at Cardiff Central for Portsmouth Harbour.

How long is the drive?

The drive takes about 6 hours depending on traffic.

Trains arrive at Portsmouth Harbour station.

Is it cheaper to drive?

Driving is often more cost-effective for families or groups.

There are no tolls on the route from Pembroke to Portsmouth.

Pembroke

Portsmouth

Train Driving

Pembroke to Portsmouth

Updated: 29 May 2026

The journey from Pembroke to Portsmouth covers approximately 400 km. By train, you will travel via Transport for Wales to Cardiff, then connect to a Great Western Railway service to Portsmouth Harbour. Driving involves taking the A477, A48, M4, and A3 south. This journey takes you from the Welsh coast across the Severn Bridge into the historic naval city of Portsmouth. Expect a travel time of roughly 7 hours by rail or 6 hours by car. Portsmouth Harbour is the primary arrival point for rail passengers.

Total Distance: 400 km driving distance, 320 km straight-line air distance.

Fastest Way

Driving, taking approximately 6 hours.

Cheapest Way

Train, if booked in advance, starting from 70 GBP.

Compare Pembroke to Portsmouth Routes

	Train Connecting	Driving Direct
Duration	7 hours	6 hours
Avg Price	70-140 GBP	70-100 GBP fuel
Operator	Great Western Railway	Personal Vehicle
Route	Pembroke Dock to Cardiff Central to Portsmouth Harbour	A477, A48, M4, A3
Tip	The connection at Cardiff is usually efficient; check platform numbers.	The A3 can be very busy near Portsmouth; check live traffic reports.

Travel Tips

Station Arrival
Portsmouth Harbour station is a short walk from the city center.
Traffic
The A3 motorway can be congested near Portsmouth; check live traffic reports.
Booking
Use the Trainline app for real-time updates on your connection.
Parking
Use the city-center car parks for convenient access to the dockyard.
Weather
Portsmouth is generally mild, but carry a jacket for coastal walks.

Safety Tips

Personal Safety
Stay in well-lit areas when walking in the city center at night.
Vehicle Security
Ensure your car is locked and no items are visible when parked.
Road Safety
The A3 is a major road; stay alert for heavy goods vehicles.
Emergency
Dial 999 for any urgent assistance.