Praia de Guajiru's calm waters generally provide safe swimming conditions, particularly appealing for those seeking peaceful beach experiences. The presence of reefs can create protected areas with gentler waves. However, always exercise caution around reef areas to avoid cuts or injuries from sharp coral or rocks. As a less developed, hidden beach, lifeguard services may be limited or absent, so swim responsibly and assess conditions yourself. Avoid swimming alone and be aware of tidal changes. The tranquil nature makes it suitable for relaxed swimming, but basic water safety remains essential.

Praia de Guajiru is already known as a hidden, tranquil beach, so it naturally sees fewer crowds than major tourist destinations. For the least crowded experience, visit during weekdays outside Brazilian school holidays and major festivals. The shoulder seasons between peak tourist periods offer excellent conditions with minimal visitors. Early mornings and late afternoons provide the most peaceful moments. Since it's recommended for less crowded times generally, the beach maintains its serene character throughout most periods. The remote location naturally limits visitor numbers, making most visits relatively private and peaceful.