Pool swim season in Red Bank, TN
When can you swim in an outdoor pool in Red Bank, TN?
An unheated pool in Red Bank never reaches 78°F in a normal year. It peaks around 78°F in Aug. The air allows up to 5 swimmable months with a heater (May to Sep).
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What each heater buys you in Red Bank
| Option | Months | Swimmable | Energy/yr | All-in/yr |
|---|---|---|---|---|
| No heater | 0 | no month | $0 | $0 |
| Solar cover only | 4 | Jun to Sep | $0 | $50 |
| Solar panels + cover | 5 | May to Sep | $0 | $283 |
| Heat pump + cover | 5 | May to Sep | $90 | $640 |
| Gas heater + cover | 5 | May to Sep | $158 | $583 |
For a 450 sq ft pool held at 80°F, at TN prices of 13.8¢/kWh electricity and $12/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Red Bank
Solar cover only: 4 of 5 possible months for about $50 a year all-in, which works out near $13 for each month it adds.
Before you pay for any heater, buy a solar cover: on its own it adds 4 months here for about $50 a year (why a cover comes first). If you get quotes, ask for gas as well as a heat pump: once the purchase price is counted, gas comes out cheaper all-in here (heat pump or gas).
Weather station: Lookout Mtn-Point Park, 7.6 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Red Bank 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 | 46° | 37° | 2.3 | 38° | 44° | – | – |
| Feb | 49° | 40° | 2.9 | 39° | 45° | – | – |
| Mar | 58° | 48° | 4.0 | 45° | 51° | – | – |
| Apr | 68° | 58° | 5.3 | 55° | 61° | – | – |
| May | 74° | 66° | 5.8 | 64° | 70° | $76 | $132 |
| Jun | 81° | 73° | 6.3 | 72° | 78° | $12 | $23 |
| Jul | 84° | 76° | 6.0 | 77° | 83° | – | – |
| Aug | 82° | 75° | 5.5 | 78° | 84° | – | – |
| Sep | 78° | 70° | 4.8 | 74° | 80° | $2 | $3 |
| Oct | 67° | 59° | 3.7 | 65° | 71° | – | – |
| Nov | 57° | 48° | 2.8 | 53° | 59° | – | – |
| Dec | 49° | 41° | 2.0 | 43° | 49° | – | – |
Heating costs most in May (about $76 with a heat pump, $132 with gas). Sunshine peaks in Jun at 6.3 kWh/m²/day (NASA satellite data, 47.0 km grid cell). Highlighted months are swimmable with no heater.
How Red Bank compares with nearby cities
Red Bank ranks 61 of 65 Tennessee cities for unheated swim months; Chattanooga, East Ridge, Soddy-Daisy nearby get a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Chattanooga, TN | 4 mi | 3 | 7 | $200 |
| East Ridge, TN | 9 mi | 3 | 7 | $195 |
| Soddy-Daisy, TN | 13 mi | 1 | 7 | $314 |
| Fort Oglethorpe, GA | 13 mi | 2 | 7 | $299 |
| Collegedale, TN | 15 mi | 3 | 7 | $200 |
| Cleveland, TN | 24 mi | 2 | 7 | $262 |