Marina Beach is generally not recommended for swimming due to strong currents and water quality concerns typical of urban coastal areas. The beach is better suited for strolling, enjoying the sea breeze, and relaxing on the sand. Local authorities advise caution near the water's edge, especially during high tide. The beach's main appeal lies in its scenic sunset views and recreational facilities rather than water activities. If swimming is a priority, consider visiting other beaches in Central Java with better conditions and lifeguard services.

Marina Beach can be visited year-round, but late afternoon to early evening is ideal for catching stunning sunsets and cooler temperatures. Weekdays are less crowded than weekends when local families flock to the beach. The dry season from May to September typically offers clearer skies and less rainfall, though Semarang's tropical climate means brief showers can occur anytime. Early mornings provide a peaceful atmosphere for walks. Avoid major Indonesian holidays if you prefer quieter visits, as the beach becomes very busy with local tourists.