Is it worth heating a pool on the Georgia coast? For owners who would actually swim in spring and fall, usually yes. A heater can roughly double the number of months your pool is comfortable. Whether that is worth the money depends on how much you would use those extra months, which fuel you have, and whether you are willing to use a cover.

Here is how the season, the costs and the trade-offs work out in Brunswick, the Golden Isles, Camden County and Amelia Island.

How long is swim season in Georgia without a heater?

An unheated pool roughly follows the average of the daytime high and the overnight low, a little warmer in full sun and cooler under trees. Most swimmers want water in the upper 70s or warmer.

NOAA's 30-year climate normals for Brunswick show how that plays out:

June through September: average daily temperatures of 79 to 84 degrees. The pool is comfortable with no help.
May and October: averages of about 76 and 71 degrees. May is borderline. October starts fine and fades quickly once the nights cool off.
March, April and November: averages of 62 to 68 degrees, with afternoon highs in the 70s. Beautiful weather, cold water.
December through February: averages in the mid-50s, with lows in the mid-40s.

So the natural season on our coast runs from about mid-May through September, or four to five months. The irony is that the most pleasant months to be outside, April and October, are the ones when an unheated pool is too cold to enjoy.

What a heater adds

A heat pump works well whenever the air is mild. In our climate that means March through November for most pools, turning a four-to-five-month season into about nine months.
A gas heater does not care about the weather. It will give you a warm pool or a hot spa on any day of the year, but each hour of heat costs more.

Our earlier post on gas heaters vs. heat pumps walks through the fuel math in detail.

How much does it cost to heat a pool?

There are two costs: getting the water up to temperature, and keeping it there.

Warming it up. Raising a 15,000-gallon pool by 10 degrees takes about 1.25 million BTU. At rates we checked in October 2026, that heat costs about $8 to $14 with a heat pump, $11 to $28 with natural gas and $49 to $53 with propane.

Keeping it warm. This is the bigger number, and it depends on the weather, the wind, the shade and above all the cover. The U.S. Department of Energy publishes an estimate for Atlanta, which is cooler than the coast: holding a 1,000-square-foot pool at 80 degrees from April through October with a heat pump costs about $1,500 a season uncovered and about $280 with a cover, at an electric rate close to Georgia Power's current one.

A 15-by-30-foot backyard pool has 450 square feet of surface, less than half of that example. Scaled by surface area, DOE's figures come to very roughly $700 a season uncovered and $125 covered, before anything extra for heating in March or November. Treat that as a ballpark, not a quote. Propane costs several times more for the same heat.

The cover decides whether heating is worth it

Most of a pool's heat leaves from the surface, and evaporation is the largest loss. DOE calls covering the pool the single most effective way to reduce heating costs, with savings of 50 to 70 percent possible. It also reports that covers cut make-up water by 30 to 50 percent and chemical use by 35 to 60 percent.

If you are not going to use a cover, be honest with yourself about that before you buy a heater. A heated, uncovered pool in a breezy yard near the marsh costs far more to hold at temperature than the same pool covered at night.

When is it worth heating a pool?

You would swim in April, May, October and November if the water were warm.
You have an attached spa. A heater is what makes a spa usable at all.
Family visits at spring break or Thanksgiving, and you want the pool to be part of it.
You swim for exercise or therapy and need consistent water temperature.
The home is a vacation rental and you want the pool usable for spring and fall guests.

When it probably is not

You only use the pool in the heat of summer.
The pool sits in heavy shade and you will not cover it.
Your only fuel is propane and you want the pool warm all winter. It can be done, but the fuel bill is steep.

There is also a middle path. A cover by itself holds in the heat the sun puts into the water during the day, and can stretch the season at both ends without any heater.

What it costs to add or replace a heater

In our service records, replacing a gas pool heater has run from about $3,000 to $9,000 installed, depending on heater size and model and on the gas, venting and plumbing work involved. Adding a first heater to a pool that never had one usually costs more than a swap, because a gas line or a new electrical circuit has to be run to the equipment pad.

We do not publish a heat pump range. The price depends on the size of the unit and the electrical work your panel needs, so we quote those on site.

Why decide in the fall

Late October is a practical time to make the call. A heater installed now gives you November and is ready for a March start. Spring is when everyone remembers the heater at once.

Pool heater installation in the Golden Isles, Camden County and Amelia Island

Jeff's Pool & Spa Service has served coastal Georgia for more than 25 years. We install and repair gas heaters and heat pumps, and we will tell you plainly whether heating makes sense for your pool, your fuel and the way you swim. Request a quote, see our repair and installation services, or call:

Brunswick and the Golden Isles: (912) 554-0636
St. Marys, Kingsland and Amelia Island: (912) 576-3636

Frequently asked questions

Is it worth heating a pool in Georgia?
On the coast, usually yes if you would swim in spring and fall. A heat pump and a cover can take the season from about five months to about nine.

How long is swim season in Georgia?
Unheated, about mid-May through September on the coast. With a heat pump, roughly March through November. With gas, any day you are willing to pay for.

How much does it cost to heat a pool per month?
It varies widely. Scaling DOE's Atlanta estimate to a 450-square-foot pool on a heat pump gives very roughly $20 a month with a cover and $100 without, averaged over April through October. Cooler months and propane cost more.

Is it cheaper to keep a pool heated or to heat it only when needed?
A pool loses heat faster the warmer it is, so turning the heater down when you will be away for several days saves energy. With a heat pump, reheating is slow, so most owners hold the temperature during the weeks they swim.

Is It Worth Heating a Pool in Coastal Georgia?