Pool swim season in Grosse Pointe Park, MI

Grosse Pointe Park, MI: how long the pool season really is

An unheated pool in Grosse Pointe Park never reaches 78°F in a normal year. It peaks around 74°F in Aug. The air allows up to 4 swimmable months with a heater (Jun 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 Grosse Pointe Park pool, side by side

For a 450 sq ft pool held at 80°F, at MI prices of 21.7¢/kWh electricity and $11/Mcf gas. All-in spreads the purchase over the equipment's life.

The cheapest way to the full season in Grosse Pointe Park

Solar panels + cover: 4 of 4 possible months for about $283 a year all-in, which works out near $71 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 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: Grosse Pointe Farms, 2.9 mi away (NOAA 1991–2020 normals). Water temperature is estimated from air and sunshine, not measured.

Grosse Pointe Park month by month: air, sun and pool water

Heating costs most in Jun (about $101 with a heat pump, $106 with gas). Sunshine peaks in Jun at 6.3 kWh/m²/day (NASA satellite data, 37.5 km grid cell). Highlighted months are swimmable with no heater.

How Grosse Pointe Park compares with nearby cities

Grosse Pointe Park ranks 51 of 90 Michigan cities for unheated swim months, and no nearby city gets a longer unheated season.