Pool swim season in Gaffney, SC

Swim season in Gaffney without a heater, and with one

An unheated pool in Gaffney reaches 78°F in Aug, about 1 month a year. The air allows up to 7 swimmable months with a heater (Apr to Oct).

1. J
2. F
3. M
4. A
5. M
6. J
7. J
8. A
9. S
10. O
11. N
12. D

What each heater buys you in Gaffney

For a 450 sq ft pool held at 80°F, at SC prices of 15.9¢/kWh electricity and $17/Mcf gas. All-in spreads the purchase over the equipment's life.

The cheapest way to the full season in Gaffney

Heat pump + cover: 7 of 7 possible months for about $935 a year all-in, which works out near $156 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: Ninety Nine Is, 10 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.

Gaffney month by month: air, sun and pool water

Heating costs most in Apr (about $191 with a heat pump, $364 with gas). Sunshine peaks in Jun at 6.3 kWh/m²/day (NASA satellite data, 49.6 km grid cell). Highlighted months are swimmable with no heater.

How Gaffney compares with nearby cities

Gaffney ranks 42 of 42 South Carolina cities for unheated swim months; Shelby, Spartanburg, Kings Mountain nearby get a longer season without a heater.