Swimming is a popular activity at Lake Powell, especially in the summer when water temperatures can surpass 80 degrees Fahrenheit. Please be aware that there are no life guards or designated swim beaches at Lake Powell or on the Colorado River. Water Quality conditions can change at your favorite swim areas depending on high visitor use, recent storms, rising lake waters, new algal blooms, and waste from wildlife, livestock, and previous visitors coming in contact with the lake waters. Swim at your own risk. Swimming is prohibited at all marinas and launch areas.