Pool Heating in Perth — Options, Costs & What Works Best

Perth's swimming season naturally runs October to April, but with the right heating system, you can extend comfortable swimming by two to three months on either end. Here's what the options are and what makes sense in Perth's climate.

Heat Pump Pool Heaters

Heat pump heaters extract warmth from the surrounding air and transfer it to the pool water — similar in principle to an air conditioner running in reverse. They're the most popular pool heating choice in Perth due to their efficiency: for every 1 kWh of electricity used, a heat pump delivers 4–6 kWh of heat to the pool. Supply and installation: $3,000–$6,000. Running costs: $500–$1,500/year depending on usage and pool size. Best for: consistent, efficient heating across the shoulder seasons.

Solar Pool Heating

Solar heating uses roof-mounted collectors to circulate pool water through panels warmed by the sun. Perth's solar resource is outstanding — a well-sized solar heating system can extend your season by 2–3 months with near-zero running costs. Supply and installation: $2,500–$5,000. No running cost beyond the pool pump. Limitation: solar only heats during daylight, so it can't maintain temperature on cold cloudy days or overnight. Best for: maximising value in Perth's sunny climate; often combined with a pool blanket to retain overnight heat.

Gas Pool Heaters

Gas heaters provide the fastest and most powerful heating — useful for heating a pool quickly for a specific occasion rather than maintaining consistent temperature. Running costs are the highest of the three options at Perth gas tariff rates. Supply and installation: $2,000–$4,500. Running costs: $1,500–$3,500/year for regular use. Best for: spas (which need rapid heating), pools used irregularly, or as a backup to solar systems.

Pool Blankets — Free Heating Retention

Regardless of which heating system you use, a quality pool blanket (solar cover) is the most cost-effective investment. It reduces evaporation by 95%, retains solar heat overnight, and can raise pool temperature by 5–8°C on its own. Cost: $200–$600 depending on pool size. Every pool in Perth should have one.