Plymouth to Portsmouth Road Trip: Best Stops & Hidden Gems

The A38 and A303 route from Plymouth to Portsmouth spans approximately 165 miles, passing through Devon, Somerset, and Hampshire. A peculiar fact: near the A38 junction at Buckfastleigh, the road crosses the remains of a Roman road built in the 1st century AD. Estimated driving time is 3 hours 30 minutes without stops, but you'll want to linger. This guide answers is it worth driving Plymouth to Portsmouth—yes, for the landscapes and culture. For finding unexpected treasures, check out how to find the best stops and hidden gems between cities.

Fuel and Route Economics

Fuel costs vary with driving style. The topography—rolling hills in Devon, flat plains in Somerset—affects consumption. Expect average fuel efficiency of 40 mpg for a typical car, costing roughly £30 for the whole trip. Fuel stations are abundant along the A38 and A303, with clusters at Exeter, Taunton, and Andover. Prices are slightly higher at motorway services than at local stations. Recommendation: fill up at Exeter to avoid premium prices later.

• Plymouth to Exeter: ~40 miles, mostly A38 dual carriageway. Use cruise control on the hilly sections.
• Exeter to Taunton: ~30 miles, A38/A303 mix. Rolling hills, steady speed helps.
• Taunton to Andover: ~60 miles, A303 dual carriageway. Flat terrain, best for fuel efficiency.
• Andover to Portsmouth: ~35 miles, A303 then A3/M3. Final stretch, urban driving can reduce mpg.

UNESCO World Heritage Sites

The route passes near two UNESCO sites: Stonehenge (off A303 near Amesbury) and the Cornwall and West Devon Mining Landscape (detour west of Plymouth). Stonehenge is a 10-minute detour from the A303. The mining landscape requires a 30-mile detour from Plymouth but offers historic engine houses.

• Stonehenge: A303, exit at Amesbury. Open daily, admission £19.
• Cornwall Mining Landscape: A38 west to Camborne, then B3302. Free entry to some sites.

Infrastructure Safety & Road Quality

The A38 is well-maintained with street lighting up to Exeter. The A303 has sections of single carriageway with overtaking lanes. No tolls. Night driving is safe but watch for wildlife (deer) near Dartmoor. Road surface is good except near roadworks at Stonehenge tunnel project.

• Plymouth to Exeter: Dual carriageway, good lighting.
• Exeter to Taunton: Mix of dual and single, some sharp bends.
• Taunton to Andover: Mainly dual carriageway, high speed limit (70 mph).
• Andover to Portsmouth: A3 is motorway standard.

Family and Child Suitability

Stonehenge captivates children with ancient history. The Fleet Air Arm Museum in Yeovilton (off A303) has cockpits to explore. Beer in Devon offers seal-spotting cruises.

• Stonehenge: Educational and interactive.
• Fleet Air Arm Museum: Hands-on aviation.
• Paignton Zoo: Detour near Torquay, 15 miles from Plymouth.

Pet-Friendly Framework

Most service stations allow dogs on leads. The gardens at Killerton House (off A38 near Exeter) welcome dogs. In Somerset, Barrington Court has dog-friendly trails. Cafés in Taunton's town centre provide water bowls.

• Killerton House: 40 acres of dog-friendly parkland.
• Barrington Court: National Trust, dogs on leads.
• Stonehenge: Dogs allowed in landscape, not inside monument.

Hidden Off-Route Spots

Within 5 minutes of the A38: the abandoned village of Hallsands (shell of a lost fishing village) near Kingsbridge. On the A303, the deserted RAF Honeyborough airfield with overgrown runways. Near Portsmouth, Fort Widley (Victorian fort) with underground tunnels.

• Hallsands: B3194 from A38, 7 minutes. Parking available.
• RAF Honeyborough: Unmarked lane off A303 near Ilminster. Walkable.
• Fort Widley: Off A3, 5 minutes. Open weekends.

Fatigue Management & Rest Zones

For a quick nap: Sedgemoor Services (A303) has a quiet parking area. Alternatively, the layby at Bulbarrow Hill (A354 off A38) offers panoramic views and little traffic. Avoid stopping on single-track roads. Official rest stops are every 30 miles.

• Sedgemoor Services: 24-hour, café, toilets.
• Bulbarrow Hill: Unpaved layby, natural surroundings.
• Countess Roundabout (A303): Large rest area with picnic tables.

Geographical Shifts

The drive starts on the Devon coast, climbing through Dartmoor's granite tors. Near Buckfastleigh, the landscape opens into lush green valleys. The A303 then crosses the Somerset Levels, flat wetlands with rhynes. Finally, the South Downs near Winchester bring chalk hills before descending to Portsmouth's coastal plain.

• Dartmoor National Park: 5-minute detour from A38 at B3357. Heather moorland, granite tors.
• Blackdown Hills: A303 east of Taunton. Steep wooded escarpments, scenic viewpoints.
• Salisbury Plain: A303 near Stonehenge. Open chalk grassland, military firing ranges visible.

Local Commerce & Culture

Roadside stalls sell clotted cream, handmade pasties, and Somerset cider. The A38 near Exeter hosts farmers' markets on Saturdays. In Taunton, the Tudor Tavern sells local ale and cheese. Portsmouth's Historic Dockyard offers Nelson memorabilia.

• Plymouth: Barbican area for fresh seafood.
• Exeter: Fore Street market (Sat) for Dartmoor wool.
• Taunton: Somerset Cider Company, tastings available.
• Portsmouth: Southsea market (Sun) for local art.

Climatic Conditions & Route Aesthetics

Weather varies: coastal fog in Plymouth, clear skies over Dartmoor, rain in Somerset. Best sunset views from the A303 at Stonehenge, where the sun aligns with the stones in summer. Wind can be strong on Salisbury Plain. Spring and autumn offer mild temperatures and low traffic.