San Diego in October
Find out everything about the water temperature in San Diego in October. Average, minimum and maximum recorded temperatures as well as daily temperature in October for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in October
Minimum:
61.0 °F
Average:
66.8 °F
Maximum:
73.6 °F
Sea water temperature in San Diego in October
In the city of San Diego, the month of October is somewhat comfortable for swimming. The minimum recorded temperature during this month was 61.0°F on October 17, 2021, with an average temperature being 66.8°F and a maximum temperature reaching 73.6°F on October 1, 2015.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| Oct 1 | 67.7°F | 64.0°F | 67.1°F |
| Oct 2 | 67.6°F | 64.2°F | 67.5°F |
| Oct 3 | 67.2°F | 63.6°F | 67.5°F |
| Oct 4 | 67.1°F | 63.2°F | 66.9°F |
| Oct 5 | 67.5°F | 63.9°F | 67.1°F |
| Oct 6 | 67.5°F | 64.3°F | 67.4°F |
| Oct 7 | 67.5°F | 65.3°F | 67.0°F |
| Oct 8 | 67.5°F | 64.7°F | 66.5°F |
| Oct 9 | 67.5°F | 65.5°F | 65.5°F |
| Oct 10 | 67.5°F | 65.5°F | 64.7°F |
| Oct 11 | 67.5°F | 65.7°F | 64.5°F |
| Oct 12 | 67.3°F | 64.7°F | 64.7°F |
| Oct 13 | 67.0°F | 63.4°F | 65.7°F |
| Oct 14 | 66.9°F | 63.1°F | 65.9°F |
| Oct 15 | 66.7°F | 62.4°F | 66.6°F |
| Oct 16 | 66.6°F | 62.3°F | 66.8°F |
| Oct 17 | 66.5°F | 62.3°F | 66.9°F |
| Oct 18 | 66.6°F | 62.7°F | 67.3°F |
| Oct 19 | 66.7°F | 62.7°F | 67.1°F |
| Oct 20 | 66.6°F | 63.1°F | 66.7°F |
| Oct 21 | 66.7°F | 63.4°F | 66.2°F |
| Oct 22 | 66.5°F | 63.3°F | 66.0°F |
| Oct 23 | 66.4°F | 63.6°F | 65.7°F |
| Oct 24 | 66.1°F | 63.2°F | 64.8°F |
| Oct 25 | 66.2°F | 63.4°F | 64.7°F |
| Oct 26 | 66.3°F | 64.3°F | 64.6°F |
| Oct 27 | 66.1°F | 64.2°F | 64.6°F |
| Oct 28 | 65.9°F | 64.4°F | 64.6°F |
| Oct 29 | 65.8°F | 64.5°F | 65.0°F |
| Oct 30 | 65.6°F | 64.1°F | 64.2°F |
| Oct 31 | 65.6°F | 64.2°F | 64.4°F |
In an average year, San Diego offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in San Diego was recorded on August 7, 2018, reaching a 75.8°F. While the coldest temperature occurred on January 15, 2025, dipping to 55.5°F. The average readings by season are 59.8°F in Winter, 61.8°F in Spring, 68.5°F in Summer, and 66.4°F in Autumn.
October's average temperature is a slight drop from September's average of 69.2°F. In November, the temperature is expected to decrease further, potentially averaging around 63.4°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Tijuana |
55.8°F
|
17mi |
| Oceanside |
56.9°F
|
35mi |
| Laguna Beach |
57.8°F
|
67mi |
* current water temperature in this city
** straight line distance from San Diego