Pool swim season in Eustis, FL
Swim season in Eustis without a heater, and with one
An unheated pool in Eustis reaches 78°F in Jun to Sep, about 4 months a year. The air allows up to 10 swimmable months with a heater (Feb to Nov).
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What each heater buys you in Eustis
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 4 | Jun to Sep | $0 | $0 |
| Solar cover only | 6 | May to Oct | $0 | $50 |
| Solar panels + cover | 9 | Mar to Nov | $0 | $283 |
| Heat pump + cover | 10 | Feb to Nov | $310 | $860 |
| Gas heater + cover | 10 | Feb to Nov | $999 | $1,424 |
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 Eustis
Solar panels + cover: 9 of 10 possible months for about $283 a year all-in, which works out near $57 for each month it adds.
Before you pay for any heater, buy a solar cover: on its own it adds 2 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: Lisbon, 6.6 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Eustis 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 | 67° | 57° | 3.5 | 58° | 64° | – | – |
| Feb | 70° | 60° | 4.1 | 59° | 65° | $142 | $439 |
| Mar | 75° | 64° | 5.2 | 64° | 70° | $89 | $293 |
| Apr | 81° | 70° | 6.1 | 70° | 76° | $34 | $119 |
| May | 86° | 76° | 6.5 | 76° | 82° | – | – |
| Jun | 89° | 80° | 5.8 | 80° | 86° | – | – |
| Jul | 90° | 81° | 5.7 | 83° | 89° | – | – |
| Aug | 90° | 81° | 5.4 | 84° | 90° | – | – |
| Sep | 87° | 79° | 4.9 | 82° | 88° | – | – |
| Oct | 81° | 73° | 4.4 | 77° | 83° | – | – |
| Nov | 74° | 64° | 3.6 | 69° | 75° | $45 | $148 |
| Dec | 69° | 59° | 3.1 | 62° | 68° | – | – |
Heating costs most in Feb (about $142 with a heat pump, $439 with gas). Sunshine peaks in May at 6.5 kWh/m²/day (NASA satellite data, 43.3 km grid cell). Highlighted months are swimmable with no heater.
How Eustis compares with nearby cities
Eustis ranks 169 of 173 Florida cities for unheated swim months; Mount Dora, Tavares, Apopka nearby get a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Mount Dora, FL | 4 mi | 5 | 12 | $514 |
| Tavares, FL | 8 mi | 6 | 11 | $285 |
| Apopka, FL | 14 mi | 5 | 12 | $514 |
| Lady Lake, FL | 16 mi | 4 | 10 | $310 |
| Groveland, FL | 16 mi | 6 | 11 | $285 |
| Leesburg, FL | 17 mi | 6 | 11 | $285 |