The most pleasant months of the year for Sereno del Mar are August, September and July. In Sereno del Mar, there are 3 comfortable months with high temperatures in the range of 70-85°. August is the hottest month for Sereno del Mar with an average high temperature of 71.1°, which ranks it as one of the coolest places in California. Any measurable snowfall is a rare occurance in Sereno del Mar. There are few days during the summer when the humidity becomes unpleasant.