Sea Temperature in San Clemente in September

© Eric Chiou

Complete information on the sea temperature range in the Pacific Ocean in San Clemente in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in San Clemente. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

San Clemente Climate and Swimming Opportunities in September

San Clemente lies within the California in United States. The average daytime temperature in San Clemente in September is 79°F (26°C), while the nighttime average is 59°F (15°C). There are typically two rainy days during the month, with a total precipitation of 0.2 inches (6 mm). The daylight duration in September in San Clemente is 12 hours, with an average of 9 hours of sunshine per day. The average wind speed in September is 7 mph (12 km/h), and the humidity level is around 69%.

The water temperature in San Clemente in September ranges from 64°F to 70°F (18°C to 21°C). At the beginning of the month, the average temperature is around 68°F (20°C), shifting to 68°F (20°C) by mid-September and reaching 68°F (20°C) in the last ten days. Overall, the average sea temperature in San Clemente for September is 68°F (20°C). Perfect balance of refreshing water and warm air. One of the best conditions for swimming.

Frequently Asked Questions About Water Temperatures in September in San Clemente