In 2026, cruise ship pools are most crowded during "Sea Days" and the middle of the afternoon when most passengers are on board. On massive ships like Royal Caribbean’s Icon class or Carnival’s Mardi Gras, the main pool decks can feel like a bustling beach, with "chair hogging" remaining a frequent complaint despite stricter enforcement by staff. To avoid the crowds, many seasoned cruisers head to the pools early in the morning (before 9:00 AM) or during port days when most passengers are ashore. Additionally, many modern ships now feature multiple smaller, specialized pools (like adults-only "Solariums" or aft-facing infinity pools) which tend to be quieter than the central "party" pool. If you prefer a tranquil swim, check the ship’s daily app for "Deck Parties"—that is the best time to find the other pools nearly empty as the crowd gravitates toward the main stage entertainment.