Toyama Bay firefly squid in October 2027: darkest nights
Firefly squid (hotaru-ika) glow as fishermen haul nets before dawn. Sightseeing boats leave around 3 am. March to May only.
17 pitch-dark nights, 19 dark nights
New moon Fri 29 Oct · Full moon Fri 15 Oct
Night by night, October 2027
| Night | Moon | 03:00 | Best |
|---|---|---|---|
| Fri 1 Oct | 3% | ●●●●● | 03:00 |
| Sat 2 Oct | 8% | ●●●●● | 03:00 |
| Sun 3 Oct | 15% | ●●●●● | 03:00 |
| Mon 4 Oct | 23% | ●●●●● | 03:00 |
| Tue 5 Oct | 32% | ●●●●● | 03:00 |
| Wed 6 Oct | 42% | ●●●●● | 03:00 |
| Thu 7 Oct | 51% | ●●●●● | 03:00 |
| Fri 8 Oct | 61% | ●●●●● | 03:00 |
| Sat 9 Oct | 70% | ●●●●● | 03:00 |
| Sun 10 Oct | 78% | ●●●●● | 03:00 |
| Mon 11 Oct | 85% | ●●●●● | 03:00 |
| Tue 12 Oct | 91% | ●●●●● | 03:00 |
| Wed 13 Oct | 96% | ●●●●● | 03:00 |
| Thu 14 Oct | 99% | ●●●●● | 03:00 |
| Fri 15 Oct | 100% | ●●●●● | 03:00 |
| Sat 16 Oct | 99% | ●●●●● | 03:00 |
| Sun 17 Oct | 96% | ●●●●● | 03:00 |
| Mon 18 Oct | 90% | ●●●●● | 03:00 |
| Tue 19 Oct | 83% | ●●●●● | 03:00 |
| Wed 20 Oct | 73% | ●●●●● | 03:00 |
| Thu 21 Oct | 62% | ●●●●● | 03:00 |
| Fri 22 Oct | 51% | ●●●●● | 03:00 |
| Sat 23 Oct | 39% | ●●●●● | 03:00 |
| Sun 24 Oct | 28% | ●●●●● | 03:00 |
| Mon 25 Oct | 18% | ●●●●● | 03:00 |
| Tue 26 Oct | 10% | ●●●●● | 03:00 |
| Wed 27 Oct | 4% | ●●●●● | 03:00 |
| Thu 28 Oct | 1% | ●●●●● | 03:00 |
| Fri 29 Oct | 0% | ●●●●● | 03:00 |
| Sat 30 Oct | 2% | ●●●●● | 03:00 |
| Sun 31 Oct | 6% | ●●●●● | 03:00 |
Check one night in detail Toyama Bay firefly squid tours
Questions
What are the best nights to see the bioluminescence at Toyama Bay firefly squid in October 2027?
The darkest nights are Fri 1 Oct, Sat 2 Oct, Sun 3 Oct, Mon 4 Oct, Tue 5 Oct, Wed 6 Oct, Thu 7 Oct, Fri 8 Oct, Sat 9 Oct, Sun 10 Oct and more. 19 of 31 nights score at least 4 out of 5.
Which nights should I avoid in October 2027?
Avoid the nights around the full moon on Fri 15 Oct, when moonlight washes out the glow.
Toyama Bay firefly squid darkness by month
Darkness score 1-5 per tour slot from twilight and moonlight. Weather and plankton health are not included. Times are local (Asia/Tokyo).