Pool swim season in Moncks Corner, SC
Moncks Corner, SC: how long the pool season really is
An unheated pool in Moncks Corner reaches 78°F in Jun to Sep, about 4 months a year. The air allows up to 7 swimmable months with a heater (Apr to Oct).
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What each heater buys you in Moncks Corner
| 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 | 7 | Apr to Oct | $111 | $661 |
| Gas heater + cover | 7 | Apr to Oct | $240 | $665 |
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 Moncks Corner
Solar cover only: 6 of 7 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: Moncks Corner 4 N, 3 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Moncks Corner 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° | 49° | 2.8 | 50° | 56° | – | – |
| Feb | 62° | 51° | 3.4 | 50° | 56° | – | – |
| Mar | 69° | 57° | 4.5 | 56° | 62° | – | – |
| Apr | 78° | 65° | 5.8 | 64° | 70° | $90 | $192 |
| May | 84° | 73° | 6.3 | 73° | 79° | $11 | $27 |
| Jun | 90° | 80° | 6.4 | 80° | 86° | – | – |
| Jul | 93° | 83° | 6.2 | 85° | 91° | – | – |
| Aug | 91° | 82° | 5.5 | 85° | 91° | – | – |
| Sep | 86° | 77° | 4.8 | 81° | 87° | – | – |
| Oct | 78° | 67° | 4.0 | 73° | 79° | $10 | $21 |
| Nov | 68° | 57° | 3.1 | 62° | 68° | – | – |
| Dec | 61° | 51° | 2.5 | 54° | 60° | – | – |
Heating costs most in Apr (about $90 with a heat pump, $192 with gas). Sunshine peaks in Jun at 6.4 kWh/m²/day (NASA satellite data, 56.2 km grid cell). Highlighted months are swimmable with no heater.
How Moncks Corner compares with nearby cities
Moncks Corner ranks 8 of 42 South Carolina cities for unheated swim months, and no nearby city gets a longer unheated season.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Goose Creek, SC | 14 mi | 4 | 8 | $257 |
| Summerville, SC | 17 mi | 3 | 7 | $180 |
| Hanahan, SC | 19 mi | 4 | 8 | $257 |
| North Charleston, SC | 20 mi | 4 | 8 | $257 |
| Charleston, SC | 26 mi | 4 | 7 | $84 |
| Mount Pleasant, SC | 28 mi | 4 | 7 | $124 |