Swimming at Keta Beach should be approached with caution due to potentially strong Atlantic currents and waves. Conditions vary by season, tide, and weather, so it's important to assess the water before entering and ask locals about current safety. Morning hours typically offer calmer conditions. The beach is popular and usually has other people around, but organized lifeguard services are generally not present. Wade in shallow areas if you're uncertain about conditions, and never swim alone. Children and inexperienced swimmers should stay close to shore and under supervision at all times.

Keta Beach can be visited year-round, but the dry season from November to March provides the best weather with sunny days and minimal rainfall. The harmattan period (December-February) brings cooler temperatures and occasional hazy skies but remains pleasant for beach activities. A secondary dry period from July to September also offers good conditions. Weekdays tend to be quieter than weekends when locals visit. For the best combination of weather, fewer crowds, and comfortable temperatures, consider visiting between November and early December or in March before the heavy rains begin.