Best Time to See Black Widows in Hawaii
March, July and August is the best time to see black widows in Hawaii. Based on 45 verified iNaturalist observations, here is exactly when black widows 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 July 22, 2026.
Northern Black Widow · Joseph McPhail CC BY
Western Black Widow · Rebecca Ray CC BY
Western Black Widow · Michael Eisen CC BY
45 verified observations of black widows in Hawaii, recorded across 12 months of the year on iNaturalist.
When black widows are recorded in Hawaii
Peak month
March
10 records (22.2% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 1 | 2.2% |
| February | 2 | 4.4% |
| Marchpeak | 10 | 22.2% |
| April | 2 | 4.4% |
| May | 3 | 6.7% |
| June | 4 | 8.9% |
| Julypeak | 6 | 13.3% |
| Augustpeak | 6 | 13.3% |
| September | 1 | 2.2% |
| October | 5 | 11.1% |
| November | 3 | 6.7% |
| December | 2 | 4.4% |
Black Widows you are most likely to see
| Species | Verified observations |
|---|---|
| Brown Widow | 30 |
| Western Black Widow | 12 |
Weather to expect, source Open-Meteo
Typical weather in Hawaii
Recent typical conditions by month, so you can plan a trip around both when black widows are active and what the weather is doing. The best months to look for black widows sit around 57 to 76 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" |
| Marbest time | 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" |
| Julbest time | 76°F | 62°F | 18.1" |
| Augbest time | 76°F | 62°F | 16" |
| Sep | 76°F | 62°F | 19.4" |
| Oct | 75°F | 62°F | 11.3" |
| Nov | 73°F | 60°F | 10" |
| Dec | 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.
Sightings of black widows in Hawaii peak in March, when 10 of the year's 45 verified observations are logged — about 22.2% of the annual total. Activity stays high through March, July and August.
The quietest stretch is January and September, when black widows are hardest to find — January sees just 1 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The black widows you are most likely to encounter in Hawaii are Brown Widow and Western Black Widow — 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 black widows 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
Frequently asked questions
What is the best month to see black widows in Hawaii?+
March is the single best month, and the broader peak window runs through March, July and August, based on 45 verified iNaturalist observations.
When are black widows hardest to see in Hawaii?+
January is the quietest month for black widows in Hawaii, with only 1 verified records.
Are black widows active year-round in Hawaii?+
Black widows are recorded in 12 of 12 months in Hawaii, so they can be seen year-round, with a clear peak in March.