Pool swim season in Oxnard, CA
Oxnard, CA: how long the pool season really is
An unheated pool in Oxnard never reaches 78°F in a normal year. It peaks around 71°F in Aug. The air allows up to 5 swimmable months with a heater (Jul to Nov).
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Heater options for a Oxnard pool, side by side
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 0 | no month | $0 | $0 |
| Solar cover only | 0 | no month | $0 | $50 |
| Solar panels + cover | 4 | Jul to Oct | $0 | $283 |
| Heat pump + cover | 5 | Jul to Nov | $558 | $1,108 |
| Gas heater + cover | 5 | Jul to Nov | $741 | $1,166 |
For a 450 sq ft pool held at 80°F, at CA prices of 32.6¢/kWh electricity and $22/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Oxnard
Solar panels + cover: 4 of 5 possible months for about $283 a year all-in, which works out near $71 for each month it adds.
A solar cover alone adds no swim months here, so if you want a longer season you need a heater (why); still use one at night to hold the heat you pay for. If you get quotes, ask for a heat pump sized to your pool's surface area; here it beats gas all-in (heat pump or gas).
Weather station: Oxnard Ventura County Airport, 0.2 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Oxnard month by month: air, sun and pool water
| Month | Air high | Air avg | Sun kWh/m²/day | Water, unheated | Water, covered | Heat pump $ | Gas $ |
|---|---|---|---|---|---|---|---|
| Jan | 66° | 56° | 3.1 | 56° | 62° | – | – |
| Feb | 65° | 57° | 3.9 | 57° | 63° | – | – |
| Mar | 66° | 57° | 5.2 | 59° | 65° | – | – |
| Apr | 67° | 59° | 6.6 | 62° | 68° | – | – |
| May | 68° | 61° | 7.5 | 64° | 70° | – | – |
| Jun | 70° | 64° | 7.9 | 67° | 73° | – | – |
| Jul | 73° | 67° | 7.7 | 70° | 76° | $75 | $104 |
| Aug | 74° | 67° | 7.2 | 71° | 77° | $53 | $73 |
| Sep | 74° | 67° | 6.1 | 70° | 76° | $75 | $104 |
| Oct | 74° | 65° | 4.6 | 67° | 73° | $129 | $174 |
| Nov | 70° | 60° | 3.5 | 63° | 69° | $226 | $286 |
| Dec | 66° | 56° | 2.8 | 58° | 64° | – | – |
Heating costs most in Nov (about $226 with a heat pump, $286 with gas). Sunshine peaks in Jun at 7.9 kWh/m²/day (NASA satellite data, 42.9 km grid cell). Highlighted months are swimmable with no heater.
How Oxnard compares with nearby cities
Oxnard ranks 313 of 376 California cities for unheated swim months, and no nearby city gets a longer unheated season.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Port Hueneme, CA | 3 mi | 0 | 5 | $558 |
| San Buenaventura (Ventura), CA | 5 mi | 0 | 5 | $558 |
| Camarillo, CA | 10 mi | 0 | 8 | $842 |
| Santa Paula, CA | 13 mi | 0 | 8 | $842 |
| Thousand Oaks, CA | 19 mi | 0 | 8 | $823 |
| Moorpark, CA | 20 mi | 0 | 8 | $823 |