Oceanside in September
Find out everything about the water temperature in Oceanside in September. Average, minimum and maximum recorded temperatures as well as daily temperature in September for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in September
Minimum:
63.7 °F
Average:
71.5 °F
Maximum:
77.5 °F
Sea water temperature in Oceanside in September
In the city of Oceanside, the month of September is somewhat comfortable for swimming. The minimum recorded temperature during this month was 63.7°F on September 30, 2024, with an average temperature being 71.5°F and a maximum temperature reaching 77.5°F on September 7, 2019.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| Sep 1 | 72.4°F | 71.8°F | 70.5°F |
| Sep 2 | 72.4°F | 72.2°F | 70.6°F |
| Sep 3 | 72.9°F | 72.5°F | 72.3°F |
| Sep 4 | 73.1°F | 73.0°F | 72.3°F |
| Sep 5 | 72.9°F | 72.9°F | 72.2°F |
| Sep 6 | 72.6°F | 73.3°F | 70.2°F |
| Sep 7 | 72.5°F | 73.4°F | 70.6°F |
| Sep 8 | 72.5°F | 73.7°F | 70.3°F |
| Sep 9 | 72.5°F | 74.1°F | 70.4°F |
| Sep 10 | 72.7°F | 74.9°F | 70.9°F |
| Sep 11 | 72.3°F | 74.1°F | 70.8°F |
| Sep 12 | 72.3°F | 74.0°F | 72.3°F |
| Sep 13 | 72.0°F | 74.7°F | 72.3°F |
| Sep 14 | 71.9°F | 74.1°F | 72.6°F |
| Sep 15 | 71.9°F | 73.2°F | 72.8°F |
| Sep 16 | 71.8°F | 72.9°F | 72.7°F |
| Sep 17 | 71.6°F | 72.5°F | 72.3°F |
| Sep 18 | 71.4°F | 72.5°F | 72.1°F |
| Sep 19 | 70.9°F | 71.6°F | 71.7°F |
| Sep 20 | 70.6°F | 70.7°F | 71.5°F |
| Sep 21 | 70.5°F | 70.4°F | 71.4°F |
| Sep 22 | 70.6°F | 70.4°F | 71.0°F |
| Sep 23 | 70.5°F | 69.8°F | 70.5°F |
| Sep 24 | 70.3°F | 69.4°F | 70.4°F |
| Sep 25 | 70.1°F | 68.1°F | 70.6°F |
| Sep 26 | 70.2°F | 69.3°F | 70.2°F |
| Sep 27 | 70.0°F | 67.1°F | 69.4°F |
| Sep 28 | 69.7°F | 65.6°F | 69.0°F |
| Sep 29 | 69.6°F | 63.9°F | 69.9°F |
| Sep 30 | 69.6°F | 63.7°F | 70.1°F |
In an average year, Oceanside offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Oceanside was recorded on August 11, 2018, reaching a 79.1°F. While the coldest temperature occurred on April 7, 2023, dipping to 55.0°F. The average readings by season are 60.5°F in Winter, 61.8°F in Spring, 69.9°F in Summer, and 68.2°F in Autumn.
September's average temperature is a slight drop from August's average of 72.0°F. In October, the temperature is expected to decrease further, potentially averaging around 68.5°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Laguna Beach |
59.8°F
|
33mi |
| San Diego |
56.8°F
|
35mi |
| Tijuana |
56.6°F
|
53mi |
| Long Beach |
58.8°F
|
61mi |
* current water temperature in this city
** straight line distance from Oceanside