Sea Temperature in San Diego in September

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

San Diego Climate and Swimming Opportunities in September

San Diego lies within the California in United States. The average daytime temperature in San Diego in September is 79°F (26°C), while the nighttime average is 64°F (18°C). There are typically two rainy days during the month, with a total precipitation of 0.2 inches (4 mm). The daylight duration in September in San Diego is 12 hours, with an average of 8 hours of sunshine per day. The average wind speed in September is 7 mph (11 km/h), and the humidity level is around 73%.

The water temperature in San Diego in September ranges from 66°F to 72°F (19°C to 22°C). At the beginning of the month, the average temperature is around 70°F (21°C), shifting to 70°F (21°C) by mid-September and reaching 68°F (20°C) in the last ten days. Overall, the average sea temperature in San Diego for September is 70°F (21°C). Perfect swimming weather — warm water and hot air make for an enjoyable and relaxing experience.

Frequently Asked Questions About Water Temperatures in September in San Diego