Best Time to See Bats in Hawaii
October, November and December is the best time to see bats in Hawaii. Based on 69 verified iNaturalist observations, here is exactly when bats are most active across the year in Hawaii.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Hawaiian Hoary Bat · cello caruso-turiello CC BY
69 verified observations of bats in Hawaii, recorded across 11 months of the year on iNaturalist.
When bats are recorded in Hawaii
Peak month
October
26 records (37.7% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 3 | 4.3% |
| February | 2 | 2.9% |
| March | 2 | 2.9% |
| April | 4 | 5.8% |
| May | 7 | 10.1% |
| June | 0 | 0% |
| July | 1 | 1.4% |
| August | 3 | 4.3% |
| September | 5 | 7.2% |
| Octoberpeak | 26 | 37.7% |
| Novemberpeak | 8 | 11.6% |
| Decemberpeak | 8 | 11.6% |
Bats you are most likely to see
| Species | Verified observations |
|---|---|
| Hawaiian Hoary Bat | 63 |
Weather to expect, source Open-Meteo
Typical weather in Hawaii
Recent typical conditions by month, so you can plan a trip around both when bats are active and what the weather is doing. The best months to look for bats sit around 58 to 75 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 69°F | 57°F | 8.6" |
| Feb | 68°F | 56°F | 15.6" |
| Mar | 70°F | 57°F | 11.5" |
| Apr | 71°F | 58°F | 15.1" |
| May | 72°F | 59°F | 17.2" |
| Jun | 74°F | 61°F | 18.8" |
| Jul | 76°F | 62°F | 18.1" |
| Aug | 76°F | 62°F | 16" |
| Sep | 76°F | 62°F | 19.4" |
| Octbest time | 75°F | 62°F | 11.3" |
| Novbest time | 73°F | 60°F | 10" |
| Decbest time | 71°F | 58°F | 13.7" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Hawaii. Weather varies year to year, so treat these as a guide.
More on bats in Hawaii:
Sightings of bats in Hawaii peak in October, when 26 of the year's 69 verified observations are logged — about 37.7% of the annual total. Activity stays high through October, November and December.
The quietest stretch is June and July, when bats are hardest to find — no verified records exist for June. If a reliable sighting matters, plan around the peak window rather than the off-season.
The bats you are most likely to encounter in Hawaii are Hawaiian Hoary Bat — the most-recorded species in the state. Each keeps its own seasonal rhythm, but the month-by-month pattern above reflects every reported sighting together.
Where to go
Best places to see bats in Hawaii
- Ala Kahakai National Historic Trail — National Historic Trail
- Hawaiʻi Volcanoes National Park — National Park
- Kaloko-Honokōhau National Historical Park — National Historical Park
- Puʻuhonua o Hōnaunau National Historical Park — National Historical Park
- Puʻukoholā Heiau National Historic Site — National Historic Site
- Haleakalā National Park — National Park
Gear to see them
Frequently asked questions
What is the best month to see bats in Hawaii?+
October is the single best month, and the broader peak window runs through October, November and December, based on 69 verified iNaturalist observations.
When are bats hardest to see in Hawaii?+
June is the quietest month for bats in Hawaii, with no verified records on iNaturalist.
Are bats active year-round in Hawaii?+
Bats are recorded in 11 of 12 months in Hawaii, so they can be seen year-round, with a clear peak in October.
More places to see bats
More wildlife in Hawaii