Pool swim season in Fort Worth, TX
Swim season in Fort Worth without a heater, and with one
An unheated pool in Fort Worth reaches 78°F in Jun to Sep, about 4 months a year. The air allows up to 8 swimmable months with a heater (Mar to Oct).
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Heater options for a Fort Worth pool, side by side
| 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 | 7 | Apr to Oct | $0 | $283 |
| Heat pump + cover | 8 | Mar to Oct | $238 | $788 |
| Gas heater + cover | 8 | Mar to Oct | $556 | $981 |
For a 450 sq ft pool held at 80°F, at TX prices of 16.0¢/kWh electricity and $19/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Fort Worth
Solar panels + cover: 7 of 8 possible months for about $283 a year all-in, which works out near $94 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: Ft Worth Meacham Field Naaf, 2.4 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Fort Worth 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 | 59° | 48° | 3.0 | 49° | 55° | – | – |
| Feb | 64° | 52° | 3.5 | 50° | 56° | – | – |
| Mar | 71° | 60° | 4.6 | 57° | 63° | $166 | $375 |
| Apr | 78° | 67° | 5.6 | 66° | 72° | $72 | $180 |
| May | 86° | 75° | 6.0 | 74° | 80° | – | $1 |
| Jun | 93° | 82° | 6.8 | 82° | 88° | – | – |
| Jul | 97° | 86° | 6.9 | 88° | 94° | – | – |
| Aug | 97° | 86° | 6.3 | 90° | 96° | – | – |
| Sep | 89° | 79° | 5.2 | 85° | 91° | – | – |
| Oct | 80° | 69° | 4.2 | 75° | 81° | – | – |
| Nov | 68° | 57° | 3.2 | 63° | 69° | – | – |
| Dec | 59° | 49° | 2.7 | 53° | 59° | – | – |
Heating costs most in Mar (about $166 with a heat pump, $375 with gas). Sunshine peaks in Jul at 6.9 kWh/m²/day (NASA satellite data, 34.4 km grid cell). Highlighted months are swimmable with no heater.
How Fort Worth compares with nearby cities
Fort Worth ranks 59 of 252 Texas cities for unheated swim months, and no nearby city gets a longer unheated season.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Haltom City, TX | 5 mi | 4 | 7 | $131 |
| Saginaw, TX | 6 mi | 4 | 7 | $119 |
| White Settlement, TX | 7 mi | 4 | 8 | $240 |
| Watauga, TX | 8 mi | 4 | 7 | $131 |
| North Richland Hills, TX | 9 mi | 4 | 7 | $131 |
| Forest Hill, TX | 10 mi | 4 | 7 | $92 |