Seven Seas Park is a popular water park in Sunnyvale, California, offering 1 attractions for visitors of all ages. Looking for Seven Seas Park tickets, hours, and visitor reviews? You'll find everything you need below to plan your trip. Searching for a waterpark near you in Sunnyvale, California? Seven Seas Park is one of the closest local options for families and visitors looking to cool off during the warmer months. The park features a dedicated kids area with 1 splash feature. Free entry, interactive water jets, shaded picnic areas. For the best experience, plan your visit during early morning or late afternoon on weekdays to avoid the busiest periods. Seven Seas Park is widely considered excellent value for the experience it delivers. Visit during weekdays for a quieter experience, arrive early to secure a good spot, and bring your own snacks and drinks for a picnic.