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Sea Temperature in San Diego in September
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.
Water Temperature Range in San Diego in September
17°C
MINIMUN
20.5°C
AVERAGE
24°C
MAXIMUM
Historical Data of Water Temperature in September in San Diego
Water Temperature Chart for Pacific Ocean in San Diego in September
Sea Temperature Table in San Diego in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 21°C | 21°C | 20°C | 20.8°C |
| Sep 2 | 20°C | 20°C | 21°C | 20.5°C |
| Sep 3 | 20°C | 21°C | 17°C | 19.8°C |
| Sep 4 | 19°C | 21°C | 20°C | 20.3°C |
| Sep 5 | 19°C | 20°C | 19°C | 20.0°C |
| Sep 6 | 20°C | 21°C | 21°C | 21.0°C |
| Sep 7 | 20°C | 20°C | 17°C | 20.0°C |
| Sep 8 | 22°C | 22°C | 21°C | 22.0°C |
| Sep 9 | 21°C | 21°C | 21°C | 21.5°C |
| Sep 10 | 21°C | 21°C | 21°C | 21.3°C |
| Sep 11 | 20°C | 21°C | 21°C | 21.0°C |
| Sep 12 | 20°C | 21°C | 21°C | 21.0°C |
| Sep 13 | 20°C | 21°C | 21°C | 21.0°C |
| Sep 14 | 20°C | 21°C | 21°C | 21.0°C |
| Sep 15 | 20°C | 21°C | 21°C | 21.0°C |
| Sep 16 | 20°C | 21°C | 21°C | 20.8°C |
| Sep 17 | 20°C | 20°C | 21°C | 20.5°C |
| Sep 18 | 19°C | 21°C | 21°C | 20.5°C |
| Sep 19 | 19°C | 21°C | 21°C | 20.3°C |
| Sep 20 | 19°C | 21°C | 21°C | 20.5°C |
| Sep 21 | 20°C | 21°C | 21°C | 20.5°C |
| Sep 22 | 20°C | 21°C | 21°C | 20.3°C |
| Sep 23 | 20°C | 21°C | 21°C | 20.3°C |
| Sep 24 | 20°C | 20°C | 20°C | 19.8°C |
| Sep 25 | 19°C | 21°C | 20°C | 19.8°C |
| Sep 26 | 19°C | 21°C | 20°C | 19.5°C |
| Sep 27 | 19°C | 21°C | 21°C | 20.0°C |
| Sep 28 | 19°C | 22°C | 21°C | 20.0°C |
| Sep 29 | 20°C | 22°C | 21°C | 20.3°C |
San Diego Climate and Swimming Opportunities in September
26°C
Average Day Air Temperature
18°C
Average Night Air Temperature
4 mm
Precipitation Amount per Month
2 days
Number of Rainy Days
12 hrs
Daylight
per Day
8 hrs
Sunshine
per Day
11 km/h
Average Wind Speed
73%
Average
humidity
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.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in San Diego
What is the sea temperature in San Diego in September?
The water temperature in the Pacific Ocean in San Diego in September ranges from 66°F to 72°F (19°C to 22°C).
Is it possible to swim in the Pacific Ocean in San Diego in September?
The average sea temperature in San Diego in September is 70°F (21°C), and the air temperature is 79°F (26°C), so perfect swimming weather — warm water and hot air make for an enjoyable and relaxing experience.