Cardiff Bay, United Kingdom

Bay light.Bright nights.

Slate & Sea is a fictional United Kingdom casino hotel shaped by the Welsh coast: elegant rooms, generous local food, live performance, restorative spa rituals and a refined adults-only casino.

Plan your stay →Discover the Red Room

126Rooms & suites

18+Casino admission

4Dining venues

Tonight beside the bayWelsh jazz at 20:30Copper Bar · live quartet · hotel guests welcome

Croeso / Welcome

A Welsh city retreat

Coastal calm.City confidence.

Slate & Sea pairs dark Welsh-inspired stone, brushed copper and sea-glass colour with genuinely warm service. The mood is polished without becoming formal, and every space makes the most of Cardiff Bay light.

Explore the city, then return for a long dinner, a live set, a thermal spa circuit or an hour at the Red Room tables. Your evening can be as lively or as quiet as you choose.

Croeso i GaerdyddWelcome to Cardiff

Rooms beside the water

Sleep with space.

Deep beds, blackout curtains, natural textures and wide bay outlooks make every room an easy place to reset.

From £175

33 m² · King bed · Bay outlook

Baylight King

Warm oak, sea-glass tile, a window seat and rainfall shower.

From £255

47 m² · Lounge · Soaking tub

Slate Corner Suite

Extra room, curved windows and a Welsh drinks cabinet.

From £430

72 m² · Terrace · Host service

Red Dragon Terrace

Top-floor privacy, outdoor space and panoramic bay light.

Red Room Casino · 18+

Play with style.Pause with sense.

A composed casino floor with warm light, attentive hosts and a focused selection of classic and electronic games. Visit for a short session, choose a familiar table or arrange a private room.

18+Valid government-issued photo identification is required. Decide your time and spending limit before playing. Casino games involve financial risk.

European Roulette

Classic single-zero tables in the main room.

From 18:00

Cardiff Blackjack

Clearly paced tables with welcoming hosts.

From 18:00

Electronic Gallery

Contemporary slots and electronic table entertainment.

12:00–02:00

Private Slate Table

A discreet hosted space arranged in advance.

By reservation

18+Adults only

SmartCasual dress

DailyOpen until late

The Bay Stage

Cardiff after dark.

A weekly programme of Welsh jazz, acoustic sessions and choral evenings gives the hotel its own cultural rhythm—whether or not you visit the casino.

THU / 20:00

Bay piano sessions

Live standards and new Welsh voices with late cocktails.

Copper Bar

FRI / 20:30

Cardiff jazz room

Resident quartet with rotating local guests.

Bay Stage

SAT / 19:30

Fire & coast supper

A shared menu with live acoustic performance.

Cinder & Salt

SUN / 16:00

Voices by the water

Small-ensemble choral music beneath the atrium roof.

Sea Gallery

Welsh ingredients, modern table

From coast.From field.

Welsh produce, day-boat fish and confident open-fire cooking, served with the easy warmth of a great city hotel.

Plan your stay

Restaurant 01

Cinder & Salt

Welsh ingredients, coastal fish and open-flame cooking.

Dinner · 17:30–23:00

Bar 02

Copper Bar

Local spirits, live jazz and refined small plates.

Daily · 15:00–01:00

All day 03

Market Morning

Breakfast, proper coffee and a light all-day menu.

Daily · 07:00–18:00

Late 04

Sea Gallery

Bay views, zero-proof cocktails and late supper.

18+ · 18:00–02:00

Tidal Spa

Breathe deep.Move slowly.

A warm pool, mineral steam, sauna and treatment rooms influenced by Welsh rain, coastal air and the grounding texture of slate.

Slate Reset60-minute massage

Sea Light Facial75-minute treatment

Tidal CircuitPool, sauna & cool shower

Morning FlowGuided stretch & swim

Book a spa stay

Signature Cardiff package

The Bay Light Escape

Two nights for two adults with daily breakfast, dinner at Cinder & Salt, Tidal Spa access and a welcome drink. Casino participation is optional and no gambling credit is included.

Two nights in a Baylight KingBreakfast each morningThree-course dinner for twoPool, sauna & steam access

Choose your dates

From, for two adults£520Two-night package · subject to availability
View details

Before Cardiff

Good to know.

Helpful answers for planning your United Kingdom casino-hotel stay.

What is the casino age requirement?+

The Red Room is presented as an adults-only 18+ venue. Valid government-issued photo identification is required, including for registered hotel guests.

Can I stay without visiting the casino?+

Of course. The rooms, restaurants, live programme and spa are complete experiences on their own. Casino participation is always optional.

Does the casino have a dress code?+

Smart casual dress is recommended in the evening. Sportswear, beachwear and visibly soiled outdoor clothing may not be admitted.

Is spa access included?+

Registered hotel guests receive pool, sauna and steam access during standard hours. Treatments should be reserved separately.

Is Slate & Sea a real hotel?+

No. Slate & Sea is a fictional United Kingdom casino-hotel concept created as demonstration website content. Prices, venues, contact details and booking actions are illustrative.