The song debuted at number 74 on the US
Billboard Hot 100 chart in the issue dated April 28, 2007. After seven weeks on the chart, on June 9, 2007, the single reached its peak at number six. The next week it fell to number eight and stayed on the position for four weeks, before falling to number nine in the issue dated July 14, 2007. "Summer Love" became Timberlake's sixth single to reach the top 10 and stayed a total of 20 weeks on the chart. and peaked at number one on June 23, 2007. "Summer Love" became Timberlake's fifth number one single on the US Pop Songs chart. As of 2018, the song has sold 1.6 million copies in the country. "Summer Love" peaked at number eight on the
Canadian Hot 100 chart, for the issue dated June 30, 2007 and stayed on the chart for 16 weeks. Elsewhere, the song attained moderate success. In New Zealand, "Summer Love" debuted at number 35 on August 27, 2007. After thirteen weeks fluctuating on the chart, it reached its peak of fifteen on November 26, 2007. The song stayed on the chart for a total of 19 weeks. In Europe, the single entered the six national charts. In Austria, it debuted at number 52, and after two weeks, the song peaked at number 47. It stayed on the chart for a total of seven weeks. "Summer Love" was more successful in Belgium, where it reached number six on the
Flandrian Singles Chart and number eight on the
Wallonian Singles Chart. The single entered the
Swedish Singles Chart at number 53 and the next week it reached its peak at number 38. In Germany, "Summer Love" charted together with "Until the End of Time" and peaked at number 39. It stayed on the chart for nine weeks. The song also reached number 22 on the
Slovak Singles Chart. ==Live performances==