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United Kingdom
England
South East England
West Sussex
Chichester
Southbourne

Thorney Island loop from Southbourne

Moderate

4.7

(77)

483

hikers

Thorney Island loop from Southbourne

03:45

14.9km

20m

Hiking

Hike the 9.3-mile Thorney Island loop from Southbourne for coastal views, wildlife, and a unique experience on MOD land.

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Chichester Harbour AONB

Waypoints

A

Start point

Train Station

Get Directions

1

2.40 km

Thornham Bridge

Highlight • Viewpoint

Substantial bridge for it's location, great views, even in the rain!

Tip by

2

2.81 km

Thorney Island Perimeter Trail

Highlight • Natural

Thorney Island is a military base but is open to hikers who can walk around its perimeter. You have to request access at the gate through an intercom where you …

Tip by

3

4.61 km

St Nicholas Church, West Thorney

Highlight • Religious Site

A very old church with an interesting mix of war graves. Beautifully tranquil right by the sea. Only accessible on foot unless you are in the military.

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4

6.16 km

Longmere Point Beach

Highlight • Viewpoint

The southern tip of Thorney Island, Longmere Point affords wonderful views over Chichester Harbour and West Wittering. There is a lovely sandy beach here, too.

Tip by

5

6.60 km

Pilsea Island Beach

Highlight • Natural

Check the tide times, but lovely sandy beach and shallow water at low tide.

Tip by

6

8.83 km

View of Chichester Harbour Entrance

Highlight • Natural Monument

From Marker Point there are wide ranging views of Chichester Harbour across the Emsworth Channel.

Tip by

B

14.9 km

End point

Train Station

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Way Types & Surfaces

Way Types

11.1 km

2.89 km

459 m

290 m

139 m

Surfaces

13.3 km

639 m

546 m

< 100 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

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Weather

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Tuesday 5 May

16°C

8°C

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This route was planned by komoot.

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Frequently Asked Questions

Where can I park for the Thorney Island loop from Southbourne?

While the tour starts from Southbourne, specific parking details are not provided. It's advisable to look for public parking options within Southbourne village before your hike. Be aware that parking can sometimes be limited, especially during peak seasons.

Is the Thorney Island loop dog-friendly?

Yes, the Thorney Island loop is generally dog-friendly. However, as much of the route passes through a significant wildlife haven, including an RSPB nature reserve at Pilsea Island Beach, it's crucial to keep dogs under close control, preferably on a leash, to protect ground-nesting birds and other wildlife. Always clean up after your dog.

What is the best time of year to hike the Thorney Island loop?

The trail can be enjoyed year-round, but spring and autumn are particularly good for birdwatching. Be aware that sections can become very muddy after rain or due to tidal influences, so check weather and tide conditions before you go. The scenery changes dramatically with the tide, offering a different experience on repeat visits.

Are there any permits or entrance fees required for the Thorney Island loop?

No, there are no specific permits or entrance fees required to hike the Thorney Island loop. However, a significant portion of the island is owned by the Ministry of Defence (MOD), and you will encounter security gates. You must stick strictly to the public coastal path and may need to provide details via intercom at manned or remotely controlled gates.

What should I know about the military presence on Thorney Island?

A large part of Thorney Island is an active military base (Baker Army Barracks). Hikers must adhere strictly to the public coastal path. You will encounter security gates, which may be manned or remotely controlled via intercom, requiring you to provide your details for access. This unique aspect adds a distinctive element to the walk. Be aware that access through these gates may have time restrictions, potentially closing after 6 pm.

What is the terrain like on the Thorney Island loop?

The terrain is predominantly flat, making it an easy walk. You'll traverse seawalls, dyke paths, and foreshore paths. While generally easy, sections can become muddy, especially after rain or during high tides, so appropriate waterproof footwear is highly recommended. The path is not wheelchair accessible.

What points of interest will I see along the Thorney Island loop?

The loop offers diverse scenery and points of interest. You'll pass by Thornham Bridge, walk along the Thorney Island Perimeter Trail, and see St Nicholas Church, West Thorney. Other highlights include Longmere Point Beach, Pilsea Island Beach (an RSPB reserve), and enjoy a View of Chichester Harbour Entrance. You'll also spot former RAF runways and tranquil coastal vistas.

What kind of wildlife can I expect to see on the Thorney Island loop?

The area is a significant wildlife haven, especially for birds. You can expect to see numerous species, particularly around the mudflats and tidal creeks. Keep an eye out for oystercatchers, curlews, Brent geese, egrets, and herons. The Pilsea Island Beach area is particularly good for birdwatching.

Does the Thorney Island loop connect with other trails?

Yes, the coastal path around Thorney Island forms part of several longer routes. It includes sections of the King Charles III England Coast Path: South Hayling to East Head, and the initial section of the 170-mile Sussex Border Path. You'll also find parts of the South Coast Cycle Route and National Cycle Route 2 South Mundham to Christchurch intersecting.

Is the Thorney Island loop suitable for families or beginners?

Yes, the trail is predominantly flat and considered easy, making it suitable for casual walkers, families, and beginners. The 8-mile (13 km) circular route typically takes 3 to 4 hours at a relaxed pace. However, be prepared for potentially muddy sections, especially after rain, and ensure children understand the need to stay on the public path due to the military presence.

Are there any specific regulations for hiking within the Chichester Harbour National Landscape?

As the Thorney Island loop is located within the Chichester Harbour National Landscape (formerly AONB), it's important to respect the natural environment. This includes sticking to marked paths, keeping dogs under control (especially near wildlife), taking all litter home, and being mindful of the sensitive ecosystems, particularly the intertidal mudflats which are a Site of Special Scientific Interest and a Special Protection Area/Ramsar Site.

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Trail Reviews

Miranda
August 24, 2025, Thorney Island - first attempt at planning a route

Took a little longer as we had to have a quick dip. It would've been rude not to 🙄

Annoyingly I need to go 12k to figure last patch of the route is closed by mod and need to go all the way back, paths are not well maintained full of nettle and bramble

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