SeasonMapFireflies, month by month around the world
A few weeks of lights in the trees after dark, and the nights the paths are closed to headlamps.
5 destinations on SeasonMap, ranked within each month by the comfort score — because the point is not only where the season is on, but whether the weather is worth the trip while it is.
When it is on
Number of destinations with fireflies on in that month. Windows move a little each year.
Fireflies in April
- 🇹🇼 Sun Moon Lake, TaiwanFirefly season · 1 Apr – 15 May (usually)The trails around Toushe and the lake's quieter southern shore fill with them for about six weeks in spring.73climate
- 🇹🇼 Alishan, TaiwanFirefly season · 10 Apr – 15 May (usually)Alishan holds about a third of Taiwan's fireflies and the peak is a few weeks from mid-April.65climate
Fireflies in May
- 🇺🇸 Gatlinburg, United StatesElkmont synchronous fireflies · 18 May – 15 Jun (usually)Peak has landed anywhere between the third week of May and the third week of June since the park started recording it.85climate
- 🇺🇸 Congaree National Park, United StatesSynchronous fireflies · 10 May – 5 Jun (usually)One of the few places in the world where the fireflies flash in unison, and for about a fortnight in May the park runs a lottery: 145 vehicle passes a night, gates shut at half past four, and no headlights near the viewing area.69climate
- 🇺🇸 Great Smoky Mountains National Park, United StatesSynchronous fireflies · 18 May – 12 Jun (usually)For about a fortnight in late May and early June the fireflies at Elkmont flash in unison.68climate
- 🇹🇼 Sun Moon Lake, TaiwanFirefly season · 1 Apr – 15 May (usually)The trails around Toushe and the lake's quieter southern shore fill with them for about six weeks in spring.58climate
- 🇹🇼 Alishan, TaiwanFirefly season · 10 Apr – 15 May (usually)Alishan holds about a third of Taiwan's fireflies and the peak is a few weeks from mid-April.57climate
Fireflies in June
- 🇺🇸 Gatlinburg, United StatesElkmont synchronous fireflies · 18 May – 15 Jun (usually)Peak has landed anywhere between the third week of May and the third week of June since the park started recording it.82climate
- 🇺🇸 Great Smoky Mountains National Park, United StatesSynchronous fireflies · 18 May – 12 Jun (usually)For about a fortnight in late May and early June the fireflies at Elkmont flash in unison.75climate
- 🇺🇸 Congaree National Park, United StatesSynchronous fireflies · 10 May – 5 Jun (usually)One of the few places in the world where the fireflies flash in unison, and for about a fortnight in May the park runs a lottery: 145 vehicle passes a night, gates shut at half past four, and no headlights near the viewing area.60climate