Peru — Sea Water Temperature and Annual Ranges

Sea Water Temperature Along the Coast

Places with the Warmest Sea Water Today

The Most Popular Seaside Places

Coastal Seas and Oceans

Water Temperature and Swimming Overview

Water Temperature Trends

Peru’s Pacific coast is dominated by the cold Humboldt Current, so sea temperatures are generally cooler than in many tropical countries, though they vary by region and season. In the northernmost beaches around Tumbes and Piura, surface temperatures can range from about 22–28°C (72–82°F) in the warm season (December–March) down to roughly 20–24°C (68–75°F) in the cooler months. Along the central coast near Lima and Ica, typical sea temperatures are lower, roughly 15–20°C (59–68°F) with the warmest readings in summer and the coolest in June–September; winter months often feel notably chilly to swimmers. The southern coast tends to be similar or slightly cooler than the center, commonly between 14–19°C (57–66°F). During El Niño events, coastal waters can warm substantially, sometimes reaching the mid-20s °C (mid-70s °F), which temporarily improves swimming comfort and alters marine life.

Swimming Conditions

Swimming is widely permitted and practiced, but conditions influence how and where people enter the water. Northern resort beaches are most favorable for casual swimming and snorkeling because of warmer water and gentler surf. In central and southern areas, many swimmers and surfers use wetsuits to offset cooler temperatures; strong currents, rip tides and steep drop-offs make some open-coast beaches hazardous, so local guidance and lifeguard presence should be heeded. Water quality near urban outflows, especially around Lima, can be variable, so checking local advisories is advisable. Overall, Peru offers a range of swimming opportunities from warm northern bays to brisk but popular central surf breaks, with safety and comfort dependent on location, season and weather patterns.