Pool swim season in Soledad, CA
Soledad, CA: how long the pool season really is
An unheated pool in Soledad never reaches 78°F in a normal year. It peaks around 77°F in Aug. The air allows up to 8 swimmable months with a heater (Apr to Nov).
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What each heater buys you in Soledad
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 0 | no month | $0 | $0 |
| Solar cover only | 3 | Jul to Sep | $0 | $50 |
| Solar panels + cover | 6 | May to Oct | $0 | $283 |
| Heat pump + cover | 8 | Apr to Nov | $1,126 | $1,676 |
| Gas heater + cover | 8 | Apr to Nov | $1,380 | $1,805 |
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 Soledad
Heat pump + cover: 8 of 8 possible months for about $1,676 a year all-in, which works out near $210 for each month it adds.
Before you pay for any heater, buy a solar cover: on its own it adds 3 months here for about $50 a year (why a cover comes first). 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: Pinnacles Np, 8.2 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Soledad 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 | 63° | 48° | 2.7 | 48° | 54° | – | – |
| Feb | 64° | 50° | 3.6 | 50° | 56° | – | – |
| Mar | 68° | 53° | 4.9 | 53° | 59° | – | – |
| Apr | 72° | 56° | 6.2 | 57° | 63° | $355 | $423 |
| May | 80° | 62° | 7.3 | 63° | 69° | $217 | $281 |
| Jun | 89° | 68° | 8.0 | 70° | 76° | $79 | $111 |
| Jul | 96° | 73° | 7.6 | 75° | 81° | – | – |
| Aug | 96° | 73° | 6.9 | 77° | 83° | – | – |
| Sep | 92° | 70° | 5.8 | 74° | 80° | – | – |
| Oct | 83° | 63° | 4.4 | 68° | 74° | $123 | $161 |
| Nov | 70° | 54° | 3.1 | 58° | 64° | $352 | $404 |
| Dec | 62° | 48° | 2.4 | 50° | 56° | – | – |
Heating costs most in Apr (about $355 with a heat pump, $423 with gas). Sunshine peaks in Jun at 8.0 kWh/m²/day (NASA satellite data, 17.8 km grid cell). Highlighted months are swimmable with no heater.
How Soledad compares with nearby cities
Soledad ranks 215 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 |
|---|---|---|---|---|
| Greenfield, CA | 9 mi | 0 | 7 | $727 |
| King City, CA | 18 mi | 0 | 7 | $727 |
| Salinas, CA | 25 mi | 0 | 5 | $758 |
| Hollister, CA | 29 mi | 0 | 6 | $681 |
| Seaside, CA | 31 mi | 0 | 2 | $327 |
| Marina, CA | 31 mi | 0 | 5 | $823 |