Toyama Bay firefly squid in August 2027: darkest nights
Firefly squid (hotaru-ika) glow as fishermen haul nets before dawn. Sightseeing boats leave around 3 am. March to May only.
0 pitch-dark nights, 0 dark nights
New moon Mon 2 Aug, Wed 1 Sep · Full moon Tue 17 Aug
Night by night, August 2027
| Night | Moon | 03:00 | Best |
|---|---|---|---|
| Sun 1 Aug | 1% | ●●●●● | 03:00 |
| Mon 2 Aug | 0% | ●●●●● | 03:00 |
| Tue 3 Aug | 2% | ●●●●● | 03:00 |
| Wed 4 Aug | 7% | ●●●●● | 03:00 |
| Thu 5 Aug | 14% | ●●●●● | 03:00 |
| Fri 6 Aug | 23% | ●●●●● | 03:00 |
| Sat 7 Aug | 33% | ●●●●● | 03:00 |
| Sun 8 Aug | 43% | ●●●●● | 03:00 |
| Mon 9 Aug | 54% | ●●●●● | 03:00 |
| Tue 10 Aug | 64% | ●●●●● | 03:00 |
| Wed 11 Aug | 73% | ●●●●● | 03:00 |
| Thu 12 Aug | 81% | ●●●●● | 03:00 |
| Fri 13 Aug | 88% | ●●●●● | 03:00 |
| Sat 14 Aug | 94% | ●●●●● | 03:00 |
| Sun 15 Aug | 97% | ●●●●● | 03:00 |
| Mon 16 Aug | 100% | ●●●●● | 03:00 |
| Tue 17 Aug | 100% | ●●●●● | 03:00 |
| Wed 18 Aug | 98% | ●●●●● | 03:00 |
| Thu 19 Aug | 95% | ●●●●● | 03:00 |
| Fri 20 Aug | 90% | ●●●●● | 03:00 |
| Sat 21 Aug | 83% | ●●●●● | 03:00 |
| Sun 22 Aug | 75% | ●●●●● | 03:00 |
| Mon 23 Aug | 65% | ●●●●● | 03:00 |
| Tue 24 Aug | 54% | ●●●●● | 03:00 |
| Wed 25 Aug | 43% | ●●●●● | 03:00 |
| Thu 26 Aug | 32% | ●●●●● | 03:00 |
| Fri 27 Aug | 21% | ●●●●● | 03:00 |
| Sat 28 Aug | 13% | ●●●●● | 03:00 |
| Sun 29 Aug | 6% | ●●●●● | 03:00 |
| Mon 30 Aug | 2% | ●●●●● | 03:00 |
| Tue 31 Aug | 0% | ●●●●● | 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 August 2027?
0 of 31 nights score at least 4 out of 5 for darkness.
Which nights should I avoid in August 2027?
Avoid the nights around the full moon on Tue 17 Aug, 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).