Cost to Run a Evaporative (Swamp) Cooler in Hawaii
Hawaii's average residential electricity rate is 48¢/kWh as of July 2026 — the 51st cheapest in the country, 162% above the U.S. average. At typical usage (8 hours/day), a evaporative (swamp) cooler here costs $46.69 per month.
Per hour
$0.19
at 100–800 W
Per day
$1.54
8 hours/day
Per month
$46.69
97 kWh
Per year
$561
1,168 kWh
By usage level in Hawaii
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.77 | $23.35 | $280 |
| Typical (8 hrs/day) | $1.54 | $46.69 | $561 |
| Heavy (16 hrs/day) | $3.07 | $93.39 | $1,121 |
Hawaii vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a evaporative (swamp) cooler in Hawaii?
At Hawaii's current average residential rate of 48¢/kWh (July 2026), a evaporative (swamp) cooler with typical usage costs about $1.54 per day, $46.69 per month, or $561 per year.
Is running a evaporative (swamp) cooler in Hawaii more expensive than average?
Yes. Hawaii's electricity costs about 162% more than the U.S. average, so the same usage costs $46.69 per month here versus $17.80 nationally.
What does electricity cost in Hawaii right now?
Hawaii residents pay an average of 48¢ per kWh as of July 2026 — the 51st cheapest rate of the 51 U.S. jurisdictions we track.