Pool swim season in Holly Hill, FL
Swim season in Holly Hill without a heater, and with one
An unheated pool in Holly Hill reaches 78°F in Jun to Oct, about 5 months a year. The air allows up to 11 swimmable months with a heater (Feb to Dec).
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What each heater buys you in Holly Hill
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 5 | Jun to Oct | $0 | $0 |
| Solar cover only | 6 | May to Oct | $0 | $50 |
| Solar panels + cover | 9 | Mar to Nov | $0 | $283 |
| Heat pump + cover | 11 | Feb to Dec | $327 | $877 |
| Gas heater + cover | 11 | Feb to Dec | $1,067 | $1,492 |
For a 450 sq ft pool held at 80°F, at FL prices of 15.3¢/kWh electricity and $25/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Holly Hill
Heat pump + cover: 11 of 11 possible months for about $877 a year all-in, which works out near $146 for each month it adds.
Before you pay for any heater, buy a solar cover: on its own it adds 1 month 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: Daytona Beach, 4.1 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Holly Hill 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 | 69° | 59° | 3.2 | 61° | 67° | – | – |
| Feb | 70° | 61° | 3.9 | 61° | 67° | $122 | $386 |
| Mar | 74° | 65° | 5.1 | 65° | 71° | $77 | $258 |
| Apr | 79° | 71° | 6.1 | 71° | 77° | $25 | $89 |
| May | 84° | 76° | 6.4 | 77° | 83° | – | – |
| Jun | 88° | 80° | 5.8 | 81° | 87° | – | – |
| Jul | 89° | 82° | 5.8 | 84° | 90° | – | – |
| Aug | 89° | 83° | 5.4 | 85° | 91° | – | – |
| Sep | 87° | 81° | 4.9 | 84° | 90° | – | – |
| Oct | 82° | 75° | 4.3 | 79° | 85° | – | – |
| Nov | 76° | 68° | 3.4 | 72° | 78° | $18 | $62 |
| Dec | 71° | 62° | 2.9 | 65° | 71° | $85 | $272 |
Heating costs most in Feb (about $122 with a heat pump, $386 with gas). Sunshine peaks in May at 6.4 kWh/m²/day (NASA satellite data, 52.2 km grid cell). Highlighted months are swimmable with no heater.
How Holly Hill compares with nearby cities
Holly Hill ranks 130 of 173 Florida cities for unheated swim months, and no nearby city gets a longer unheated season.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Ormond Beach, FL | 5 mi | 5 | 11 | $338 |
| Daytona Beach, FL | 5 mi | 5 | 11 | $338 |
| South Daytona, FL | 6 mi | 5 | 11 | $327 |
| Port Orange, FL | 9 mi | 5 | 11 | $338 |
| New Smyrna Beach, FL | 16 mi | 5 | 11 | $304 |
| Edgewater, FL | 21 mi | 5 | 11 | $300 |