Yes, you can still enjoy a full day at Siam Park in Tenerife even if you cannot swim. The park is designed with several "low-impact" attractions where swimming ability is not required. The Mai Thai River, a world-class lazy river, allows you to float in a large rubber ring that keeps you entirely above the water; the depth is shallow, and life jackets are provided for extra security. The Siam Beach wave pool has a shallow entry area where you can sit and enjoy the water without going deep enough to require swimming. Additionally, the Lost City is a massive water fortress designed for children and non-swimmers with various bridges and small slides. Most of the major high-adrenaline slides like the Mekong Rapids or The Dragon use large multi-person rafts that keep you securely seated above the water level. In 2026, the park continues to offer complimentary life jackets at several stations. As long as you follow the safety signs—some of which specifically indicate where swimming ability is "required," such as the deep end of the Wave Palace—you can have a fantastic, safe experience.