Pool swim season in Mandeville, LA
Swim season in Mandeville without a heater, and with one
An unheated pool in Mandeville 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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What each heater buys you in Mandeville
| 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 | $183 | $733 |
| Gas heater + cover | 8 | Mar to Oct | $465 | $890 |
For a 450 sq ft pool held at 80°F, at LA prices of 13.3¢/kWh electricity and $17/Mcf gas. All-in spreads the purchase over the equipment's life.
The cheapest way to the full season in Mandeville
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: Covington 4 NNW, 10.4 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.
Mandeville 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 | 62° | 51° | 2.9 | 52° | 58° | – | – |
| Feb | 66° | 55° | 3.5 | 53° | 59° | – | – |
| Mar | 72° | 61° | 4.6 | 59° | 65° | $120 | $297 |
| Apr | 78° | 67° | 5.7 | 66° | 72° | $58 | $154 |
| May | 84° | 74° | 6.2 | 73° | 79° | $5 | $14 |
| Jun | 89° | 79° | 6.1 | 79° | 85° | – | – |
| Jul | 90° | 81° | 5.8 | 83° | 89° | – | – |
| Aug | 90° | 81° | 5.5 | 83° | 89° | – | – |
| Sep | 87° | 77° | 5.1 | 81° | 87° | – | – |
| Oct | 79° | 68° | 4.4 | 74° | 80° | – | – |
| Nov | 70° | 58° | 3.4 | 64° | 70° | – | – |
| Dec | 64° | 53° | 2.6 | 55° | 61° | – | – |
Heating costs most in Mar (about $120 with a heat pump, $297 with gas). Sunshine peaks in May at 6.2 kWh/m²/day (NASA satellite data, 40.6 km grid cell). Highlighted months are swimmable with no heater.
How Mandeville compares with nearby cities
Mandeville ranks 34 of 35 Louisiana cities for unheated swim months; New Orleans, Kenner nearby get a longer season without a heater.
| City | Distance | Unheated months | Heat pump months | Heat pump $/yr |
|---|---|---|---|---|
| Covington, LA | 7 mi | 4 | 8 | $183 |
| Slidell, LA | 20 mi | 4 | 8 | $173 |
| Hammond, LA | 23 mi | 4 | 9 | $285 |
| New Orleans, LA | 24 mi | 5 | 8 | $115 |
| Kenner, LA | 27 mi | 5 | 9 | $169 |
| Picayune, MS | 28 mi | 4 | 9 | $341 |