What if I arrive and the car park is full?

Have a backup town in mind before you leave. The most common failure is arriving at Kingley Vale or Cissbury Ring on a sunny Saturday to find the limited parking full (South Downs National Park Authority, 2024). If that happens, drive to the nearest town hub, Chichester or Arundel both have multiple car parks and indoor options.

Can I do a rainy-day plan with a pushchair?

Yes, if you choose the right hub. Chichester Cathedral, the Wetland Centre boardwalks, and Worthing’s promenade are all pushchair-friendly. Avoid the South Downs trails; even those marked as pushchair-friendly often have steep sections or stiles that make them impractical for standard pushchairs.

Are dogs welcome on rainy-day plans?

It depends on the venue. Worthing Pier is dog-friendly. Arundel Wetland Centre allows dogs on leads. Arundel Cathedral and the Worthing Museum do not allow dogs. Check the official site for each venue before you travel; “dog-friendly” on a sign often means only in the bar or garden, not the main building.

What if the rain stops mid-morning?

That is the best-case scenario in West Sussex. Start at an indoor attraction, Chichester Cathedral or the Wetland Centre, and if the weather clears, walk to a nearby outdoor site. The key is to have a base that lets you switch without moving the car. Chichester is the best hub for this: you can go from cathedral to harbour path in 15 minutes.

Rainy-day plans | Inside West Sussex

Rainy-day plans

The decision rule for a wet day in West Sussex

West Sussex is not a single landscape. Rain behaves differently on the chalk downs, the clay Weald, the coastal plain and the tidal harbours. On a wet day, the key is to pick a town-based cluster where you can move between indoor attractions, sheltered spaces, and short protected walks without needing a car for every leg.

The rule of thumb: If rain is heavy all day, head to a town with a museum, a cathedral or castle, and a covered market or indoor arcade. If rain is light or intermittent, choose a coastal or harbour town where you can walk between shelters and watch the weather change over the water. If rain is forecast but uncertain, pick a town with both indoor and outdoor options within a five-minute walk of each other.

West Sussex: the rain-ready mindset

West Sussex receives 800-900 mm of rain per year on average (Met Office, 1991-2020 average). That is about 120 rain days annually. Rain is not a reason to cancel; it is a reason to choose the right hub. The county has more indoor heritage sites per square kilometre than many rural areas, and most towns have covered markets, arcades, or historic buildings that shelter visitors. The key failure mode is arriving at a remote outdoor site only to find the cafe closed and no alternative cover. Avoid that by basing yourself in a town with multiple options within walking distance.

Checklist for any rainy day: - Check the Met Office forecast for that specific town, not the general county. - Confirm opening hours at the official site of your chosen attraction; many smaller venues close early in wet weather or have reduced winter hours. - Have a backup plan within the same town that does not require driving. - If travelling by train, check National Rail for engineering works; Sunday services on some West Sussex lines can be replaced by buses.

South Downs: wet-weather alternatives on the chalk

The South Downs National Park covers 1,627 km² in West Sussex (South Downs National Park Authority, 2024). On a dry day you might walk the South Downs Way. On a wet day, the chalk turns to slippery, sticky mud, and exposed ridges offer no shelter. Instead, use one of the following town-based hubs on the edge of the downs.

Midhurst

Midhurst (population 4,900, West Sussex County Council 2021 census) is a compact market town with a ruined Tudor palace, Cowdray House, whose grounds are free and open dawn to dusk (Cowdray Estate, 2024). The ruin provides partial shelter and the town has several covered arcades. The Cowdray Estate’s car park has 50 free spaces.

Steyning

Steyning (population 6,000, West Sussex County Council 2021 census) has a historic high street with covered shopfronts and two public toilets (Steyning Town Council, 2024). The Steyning Downland Scheme offers short, low-gradient walks that stay drier than the exposed ridge. The town’s car park holds 200 spaces.

Decision for the downs: If rain is light, use Steyning for a short sheltered walk and a pub stop. If rain is heavy, choose Midhurst for the ruin and indoor options.

Chichester: the cathedral city with harbour cover

Chichester is the most rain-resilient hub in West Sussex. The cathedral was founded in 1075 (Chichester Cathedral official site, 2024) and offers free entry to the main building, which is large enough to absorb crowds. The building has full disabled access. The Chichester Festival Theatre (founded 1962, capacity 1,200 seats) has a sheltered foyer and cafe (Chichester Festival Theatre, 2025). The city’s market day is not a single day; the city has a daily market in the indoor market hall.

Chichester Harbour

The harbour is an Area of Outstanding Natural Beauty designated in 1964 (Chichester Harbour Conservancy, 2024). On a wet day, the harbour’s five water sports centres (Chichester Harbour Conservancy, 2024) are less appealing, but the visitor centre (open Monday to Friday 9:00-17:00, Chichester Harbour Conservancy, 2024) provides sheltered viewing. There are ten car parks around the harbour.

Checklist for Chichester: - Park in one of the city’s park-and-ride lots or use the 300-space theatre car park. - Visit the cathedral first (free, open 9:00-17:00). - Walk to the Festival Theatre for a matinee or cafe. - If rain eases, walk the short flat path to the harbour visitor centre.

Arundel: castle, wetland, and lido in one walkable town

Arundel is a small town with three distinct wet-weather options within a 10-minute walk of each other. Arundel Castle opens from March to October, Tuesday to Sunday, 10:00-17:00 (Arundel Castle official site, 2025). The castle has partial disabled access and a car park with 150 spaces. The Arundel Wetland Centre, managed by the WWT, has accessible boardwalks and sheltered hides; it is open year-round. The Arundel Lido opens May to September (Arundel Lido official site, 2025) and is a covered heated pool.

Decision for Arundel: - If rain is heavy, choose the Wetland Centre for boardwalks and hides. - If rain is light, the castle provides partial cover and guided tours last one hour. - If you have children, the lido is a good wet-weather option in season.

Cross-border note: Arundel is entirely within West Sussex. The cathedral (built 1873, free entry) and the castle are separate sites with separate entrances.

Worthing: seaside shelter on the coast

Worthing’s 300-metre Victorian pier (Worthing Borough Council, 2023) is open 24 hours and has a sheltered pavilion and cafe. The seafront promenade runs 5 km and is flat, pushchair-friendly, and partly protected by the pier and beach huts. The Worthing Museum and Art Gallery (free admission, open Tuesday to Saturday 10:00-17:00, Worthing Borough Council, 2025) has full disabled access and is dog-free. The pier is dog-friendly.

Checklist for Worthing: - Park in the 100-space pier car park. - If rain is heavy, spend time in the museum and the pier pavilion. - If rain is light, walk the promenade east to west; the wind often comes from the south-west, so walking into the wind means the rain is at your back on the return.

Failure mode to avoid: The museum closes at 17:00 and is not open on Sundays or Mondays. Check the official site before travelling.

Crawley and Horsham: inland options with sheltered shopping

Crawley

Crawley (population 112,000, West Sussex County Council 2021 census) has a town centre with 1,500 car park spaces (Crawley Borough Council, 2025) and a market on Tuesdays and Saturdays. The town has a covered shopping centre and a library open Monday to Saturday 9:00-17:00. Crawley is a practical rain-day hub if you need shopping, indoor facilities, and easy rail access. It has direct London services from two stations.

Horsham

Horsham has a free museum (open Tuesday to Saturday 10:00-17:00, Horsham District Council, 2025) with full disabled access, and a Saturday market. The town’s car parks are well-signed. Horsham is a good fallback if the coastal towns are too busy or if rain is forecast to clear by mid-afternoon and you want to be near the downs.

Decision for inland hubs: Use Crawley or Horsham only if your main goal is shopping or if other hubs are too far. They lack the unique indoor attractions of Chichester or Arundel.

The rainy-day checklist (print or save)

[ ] Check the Met Office forecast for the specific town.
[ ] Confirm opening hours at the official site of your chosen attraction.
[ ] Choose a town hub with at least two indoor options within a five-minute walk.
[ ] If travelling by train, check National Rail for engineering works.
[ ] Have a backup plan in the same town.
[ ] If walking, wear boots with good grip; chalk is slippery when wet.
[ ] If driving, arrive by 10:00 to secure parking; popular lots fill early.
[ ] Carry cash for parking meters that do not accept cards.
[ ] Check tide times if visiting harbour paths; the incoming tide can cut off routes.

Why this method works

West Sussex is a patchwork of landscapes. A single generic plan fails because the weather affects each area differently. By clustering your activities around a single walkable town, you minimise transfers, maximise shelter options, and avoid the failure modes of full car parks, closed cafes, and muddy trails. The town-based cluster method gives you resilience: if one attraction is closed, another is a short walk away.