The adults-only Solarium is one of the most peaceful, relaxing, and upscale spaces found on many major cruise lines, including Royal Caribbean, Celebrity Cruises, MSC Cruises, and others. Designed exclusively for adults—typically ages 16 or 18 and above depending on the cruise line—the Solarium is a retreat that allows grown-up travelers to unwind away from the energetic atmosphere of the main pool deck. With shaded loungers, climate-controlled pools, comfortable seating, lush greenery, and a spa-like ambiance, the Solarium has become a favorite feature for travelers seeking serenity at sea.

This article explores what the adults-only Solarium really is, what facilities it includes, why it is so popular, and how to make the most of it on your next cruise. From amenities and design features to privacy, comfort, and tips for enjoying it, this detailed guide provides everything you need to know.

Key Features and Ambiance of the Adults-Only Solarium

The adults-only Solarium is intentionally crafted to be one of the most tranquil spaces aboard a cruise ship. While every ship designs it differently, there are several signature characteristics that define this exclusive retreat.

A Climate-Controlled Environment

One of the most recognizable aspects of the Solarium is its temperature-controlled environment. Many ships create a semi-indoor or glass-covered setting that allows passengers to enjoy the pool area without worrying about wind, rain, or sunburn. Because of its protective structure, guests can use the Solarium comfortably whether the ship is sailing in the Caribbean heat or crossing cooler northern seas.

Calm and Spa-Like Atmosphere

The Solarium is known for a soothing ambiance designed to promote rest and relaxation. Features often include:

• Cascading waterfalls

• Gentle fountains

• Soft ambient lighting

• Lounge chairs with extra padding

• Aromatic greenery and tropical plants

• Quiet background music

• Fewer crowds compared to the main pool decks

Passengers seeking peace and quiet find the Solarium ideal for reading, meditating, enjoying a drink, or simply taking a break from the lively onboard activities.

Usage Restrictions for Adults

The Solarium is strictly age-restricted to maintain its adult-focused atmosphere. Depending on the cruise line:

• Royal Caribbean: Ages 16+

• Celebrity Cruises: Ages 18+

• MSC Cruises: Ages 18+

Children and younger teens are not allowed inside, even if accompanied by an adult. This ensures the setting remains serene, quiet, and exclusively tailored for grown-ups.

Amenities and Facilities Inside the Solarium

Cruise lines invest heavily in making the Solarium one of the most luxurious and comfortable spaces onboard. The specific amenities vary by ship and cruise line, but many features are consistent across most modern vessels.

Relaxation-Focused Pool Areas

The Solarium often includes pools that are quieter and more adult-oriented than the ship’s main pools. These may consist of:

• Heated pools designed for calm soaking

• Thermal pools with jets or bubble features

• Shallow lounging pools for reclining in warm water

Because children are not allowed, the experience is more peaceful, with no splashing, running, or noise.

Whirlpools and Hot Tubs

Most Solariums include adults-only whirlpools. These hot tubs are typically elevated or built into the deck structure for privacy. They are ideal for:

• Stress relief

• Muscle relaxation

• Evening stargazing

• Quiet conversations

Many cruise lines allow guests to stay in the whirlpools late into the evening, creating a romantic, calming atmosphere.

Comfortable Loungers and Daybeds

The Solarium is furnished with more premium seating than the main deck, including:

• Cushion-topped loungers

• Double sun beds

• Shaded cabanas (sometimes free, sometimes for a fee)

• Curved relaxation chairs

• Swing seats or hanging loungers on some ships

During sea days, lounge chairs fill up quickly, so early arrival is common among experienced cruisers.

Access to Towels

Most Solariums have towel stations nearby, making it convenient to refresh or dry off after a swim.

Dining and Beverage Options

Some ships incorporate a dedicated café or bar inside the Solarium. On Royal Caribbean ships, this is often the Solarium Bistro, which features:

• Fresh salads

• Grilled meats

• Lighter cuisine

• Healthy desserts

• All-day snacks

The Solarium bar typically offers refreshing cocktails, mocktails, tropical juices, and chilled beverages. This makes the Solarium a perfect spot to enjoy drinks without leaving the peaceful environment.

Private and Quiet Zones for Adults

Most Solariums include quiet nooks or private corners for guests who wish to relax away from others. These areas are perfect for:

• Reading

• Meditation

• Listening to soft music

• Afternoon naps

• Watching the ocean scenery

Accessibility Features

Cruise ships prioritize inclusivity, so many Solariums include:

• Pool lifts

• Wide seating areas

• Smooth flooring

• Ramp access

• Grab rails

This ensures adults of all physical abilities can enjoy the space comfortably.

Design Styles Across Different Cruise Lines

Although the concept of the Solarium is consistent, each cruise line brings its own design philosophy and thematic elements to the space.

Royal Caribbean’s Iconic Solarium Style

Royal Caribbean is known for its glass-enclosed Solariums, offering a panoramic ocean view protected from the elements. Their Solariums often include:

• Large patterned glass domes

• Waterfall walls

• Mosaic tiles

• Sculptural fountains

• Ample greenery

• Warm lighting

Ships like Oasis-class and Quantum-class enhance this space with multi-level seating and oversized whirlpools.

Celebrity Cruises’ Premium Adult Retreat

Celebrity’s Solarium leans toward elegance and spa aesthetics. The design showcases:

• Calm color palettes

• Marble and wood textures

• Minimalist luxury décor

• High-end loungers

Because Celebrity caters to a more adult demographic overall, the Solarium atmosphere blends seamlessly with the ship’s premium feel.

MSC’s Modern and Creative Oasis

MSC tends to create Solariums that feel airy, chic, and contemporary. Features may include:

• Retractable roof panels

• Sleek European design

• Stylish sunbeds

• Curved architecture

MSC often ties in Mediterranean influences, giving the Solarium a relaxing coastal vibe.

Why the Adults-Only Solarium Is So Popular Among Passengers

The Solarium has become one of the most beloved areas aboard large cruise ships. Its popularity stems from several factors that appeal strongly to adult travelers.

A Peaceful Escape from Families and Crowds

Cruise ships are lively places, especially during peak seasons with many families onboard. The Solarium provides a sanctuary where adults can enjoy:

• Quiet time

• Relaxation without children

• A slower, calmer atmosphere

• Less foot traffic

This atmosphere makes it appealing for couples, solo travelers, honeymooners, retirees, and anyone seeking tranquility.

Ideal Spot for Sea Days

Sea days—when the ship is sailing without port stops—are often the busiest times around the main pools. In the Solarium, the crowd level remains manageable, allowing guests to enjoy water facilities without the overwhelming noise and activity found elsewhere.

Great for Reading and Sunbathing

Many passengers praise the Solarium as the best reading spot onboard. The shaded glass roof offers natural light without excessive sun exposure. Meanwhile, padded loungers and the absence of children make it perfect for uninterrupted relaxation.

Romantic Environment for Couples

The Solarium is particularly popular with couples looking for quality time together. The soft lighting at night, warm whirlpools, and quiet seating areas make it one of the most romantic spots on the ship.

Health-Focused Travelers Love It

Guests who prefer calm, health-oriented environments—such as spa lovers, morning meditators, and wellness-focused cruisers—gravitate toward the Solarium. Its zen-like ambiance aligns well with fitness and wellness routines.

Tips to Make the Most of the Adults-Only Solarium

To enjoy the Solarium fully, especially on popular itineraries and large ships, a few practical tips can help maximize your experience.

Arrive Early on Sea Days

Loungers fill quickly, especially near the pool or in prime shaded areas. Arriving early ensures:

• Better seating

• A quieter environment

• Access to preferred views

Avoid Peak Times

Even in the adults-only area, mid-day hours may get busier. Early morning and late evenings provide the most serene experience.

Wear Swim Attire and Bring Essentials

Since the Solarium includes pools and whirlpools, bring:

• Swimsuit

• Cover-up

• Sunglasses

• SPF (even under a glass dome)

• A book or headphones

Towels are typically provided on deck.

Stay Hydrated

While cocktails are great, also drink water to avoid dehydration—especially when using hot tubs.

Respect the Rules

The Solarium’s calm atmosphere works because passengers respect:

• The adults-only rule

• The no-running rule

• Limits on loud conversations

• Proper pool attire

• Avoiding seat-saving for long periods

This ensures everyone enjoys the space equally.

Comparing the Solarium to Other Adult Areas on Cruise Ships

While the Solarium is one of the most popular adult-only spaces, cruise ships may offer additional adult-only areas depending on the line and ship class.

Serenity Decks (Carnival)

Carnival offers a “Serenity” adults-only deck with:

• Outdoor loungers

• Hammocks

• Hot tubs

• Cocktail service

Unlike the Solarium, these decks are not covered, making them more weather-dependent.

The Sanctuary (Princess Cruises)

Princess features The Sanctuary—a premium adults-only area similar in spirit but often requiring an extra fee. It includes:

• Private cabanas

• Dedicated servers

• Exclusive loungers

• Spa-like ambiance

Adult-Only Pools on Various Lines

Some ships include additional adult-only pools or sun decks that complement the Solarium.

The difference:The Solarium is often covered, climate-controlled, and included in the cruise fare—making it a more versatile and accessible retreat.

Is the Adults-Only Solarium Free?

One of the most common questions is whether the Solarium requires a fee. On most cruise lines, the adults-only Solarium is completely free for all eligible guests. This includes access to:

• Pools

• Whirlpools

• Seating

• Quiet lounging areas

However, some premium services inside or near the Solarium—such as cabanas, upgraded loungers, or specialty drinks—may cost extra.

Who Should Use the Solarium?

The Solarium is best suited for:

• Couples seeking quiet time

• Adults who want a break from families

• Travelers who enjoy reading or napping

• Wellness-focused guests

• Solo travelers needing peaceful environments

• People who prefer shaded swimming areas

• Anyone wanting to escape the noise of the main deck

Whether you're a first-time cruiser or a seasoned traveler, the Solarium offers a serene retreat unmatched by other public spaces onboard.

Final Thoughts on the Adults-Only Solarium

The adults-only Solarium stands as one of the most cherished experiences on a cruise ship. With its peaceful ambiance, glass-covered architecture, premium loungers, warm pools, and adults-only policy, it remains a sanctuary of calm amid the lively atmosphere of a cruise vacation.

Whether you're relaxing with a book, soaking in a whirlpool, enjoying a romantic moment under the evening lights, or simply taking in ocean views in silence, the Solarium provides a rejuvenating escape that elevates your entire cruise experience.

If you’re someone who values tranquility, comfort, and a soothing environment, the Solarium is likely to become one of your favorite places on board—when you experience it once, you’ll understand why so many passengers call it the hidden gem of cruising.