Cost to Run a Evaporative (Swamp) Cooler in Hawaii
Hawaii's average residential electricity rate is 46.6¢/kWh as of April 2026 — the 51st cheapest in the country, 148% above the U.S. average. At typical usage (8 hours/day), a evaporative (swamp) cooler here costs $45.33 per month.
Per hour
$0.19
at 100–800 W
Per day
$1.49
8 hours/day
Per month
$45.33
97 kWh
Per year
$544
1,168 kWh
By usage level in Hawaii
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.75 | $22.67 | $272 |
| Typical (8 hrs/day) | $1.49 | $45.33 | $544 |
| Heavy (16 hrs/day) | $2.98 | $90.66 | $1,089 |
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 46.6¢/kWh (April 2026), a evaporative (swamp) cooler with typical usage costs about $1.49 per day, $45.33 per month, or $544 per year.
Is running a evaporative (swamp) cooler in Hawaii more expensive than average?
Yes. Hawaii's electricity costs about 148% more than the U.S. average, so the same usage costs $45.33 per month here versus $18.29 nationally.
What does electricity cost in Hawaii right now?
Hawaii residents pay an average of 46.6¢ per kWh as of April 2026 — the 51st cheapest rate of the 51 U.S. jurisdictions we track.