Lamaru Beach generally offers calm, shallow waters suitable for families and casual swimmers. The beach features gentle waves during most of the year, making it relatively safe for children under supervision. However, conditions can vary with weather and tides, so always check local conditions before entering the water. Swimming areas aren't typically monitored by lifeguards, so exercise caution and swim during daylight hours. The sandy seabed is generally free from sharp rocks, though wearing water shoes is advisable for added comfort and protection.

Lamaru Beach can be visited year-round thanks to Balikpapan's tropical climate, with temperatures consistently between 25-32°C. The driest months typically fall between May and September, offering more sunshine and calmer seas ideal for beach activities. November through March sees increased rainfall, though showers are often brief and intermittent. Weekends and Indonesian public holidays tend to be busier with local visitors. For a quieter experience, visit on weekday mornings. Sunsets are particularly scenic throughout the year, making late afternoons popular for photography.