Kertasari Beach is primarily known as a surf destination rather than a calm swimming spot. The waves that attract surfers can create challenging conditions for casual swimmers, especially beginners. Strong currents and variable surf conditions mean you should assess the water carefully before entering. If you're not an experienced swimmer or surfer, it's best to stay in shallower areas and avoid going out during high surf. Always check local conditions and consider swimming during calmer periods if you're not surfing.

Kertasari Beach can be visited year-round, though conditions vary by season. The dry season from April to October typically offers the most consistent surf conditions and pleasant weather, making it ideal for surfing and beach activities. The wet season from November to March brings more rainfall but can still provide good surf. As a relatively hidden beach in West Nusa Tenggara, it tends to be less crowded than more famous Indonesian surf spots throughout the year, offering a more secluded experience regardless of when you visit.

Kertasari Beach is located in the Taliwang area of Sumbawa Island, West Nusa Tenggara. You'll typically need to reach Taliwang first, either by ferry from Lombok or by domestic flight to nearby airports. From Taliwang town, you'll likely need to arrange local transportation such as a motorbike rental or hire a driver, as public transport to more hidden beaches can be limited. The roads leading to less-developed beaches in this region may be unpaved in sections, so confirm directions locally and consider road conditions when planning your visit.

As a hidden beach destination, Kertasari Beach has limited facilities compared to more developed tourist areas. Basic amenities may be available, but options for dining and accommodation are typically modest and locally-run. Taliwang town offers more comprehensive services including guesthouses, homestays, and restaurants serving local Sumbawa cuisine. If you're seeking a remote surf experience, consider bringing essentials with you and confirming accommodation availability in advance. Some surfers choose to stay in Taliwang and make day trips to the beach.

Kertasari Beach stands out for its relatively undiscovered status compared to crowded surf destinations like Bali or even other parts of Lombok. Being a hidden gem in West Nusa Tenggara means you're more likely to enjoy uncrowded waves and an authentic, local atmosphere. The beach offers a chance to experience surfing in a more remote setting without the commercial development found at mainstream spots. This makes it appealing for adventurous surfers seeking less-explored waves and travelers wanting to escape typical tourist circuits in Indonesia.