Swimming is generally safe as the lake waters are calm, but be aware that Lago General Carrera is a glacial lake with very cold water temperatures year-round, typically between 8-12°C (46-54°F). The beach has gentle entry points and minimal currents. Always check local weather conditions before entering, as sudden winds can develop in Patagonia. There are no lifeguards on duty, so swim at your own risk and stay close to shore. The turquoise color comes from glacial sediment, which is harmless.

The best time to visit is during the Chilean summer from December to March when temperatures are warmest (15-25°C) and days are longest. However, visiting during shoulder seasons like November or April offers fewer crowds while still providing decent weather. Winter months (June-August) are very cold and many tourist services close. For photography of the famous turquoise waters, clear sunny days produce the most vibrant colors. Strong winds are common in Patagonia year-round, but summer typically has the calmest conditions for sunbathing.