Pool swim season in Falls Church, VA

Swim season in Falls Church without a heater, and with one

An unheated pool in Falls Church reaches 78°F in Jul to Aug, about 2 months a year. The air allows up to 5 swimmable months with a heater (May to Sep).

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

Heater options for a Falls Church pool, side by side

For a 450 sq ft pool held at 80°F, at VA prices of 16.9¢/kWh electricity and $17/Mcf gas. All-in spreads the purchase over the equipment's life.

The cheapest way to the full season in Falls Church

Solar cover only: 4 of 5 possible months for about $50 a year all-in, which works out near $25 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: Dalecarlia Rsvr, 5 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.

Falls Church month by month: air, sun and pool water

Heating costs most in May (about $111 with a heat pump, $219 with gas). Sunshine peaks in Jun at 6.2 kWh/m²/day (NASA satellite data, 51.2 km grid cell). Highlighted months are swimmable with no heater.

How Falls Church compares with nearby cities

Falls Church ranks 16 of 39 Virginia cities for unheated swim months, and no nearby city gets a longer unheated season.