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Mosquito Bay in June 2027: darkest nights

Guinness-listed as the brightest bioluminescent bay in the world. Swimming is banned; tours use clear-bottom kayaks or electric boats. Year-round. Brightest after a few dry, calm nights.

14 pitch-dark nights, 16 dark nights

New moon Fri 4 Jun · Full moon Fri 18 Jun

Night by night, June 2027

NightMoon19:0021:00Best
Tue 1 Jun 9%●●●●●●●●●●21:00
Wed 2 Jun 4%●●●●●●●●●●21:00
Thu 3 Jun 1%●●●●●●●●●●21:00
Fri 4 Jun 0%●●●●●●●●●●21:00
Sat 5 Jun 2%●●●●●●●●●●21:00
Sun 6 Jun 7%●●●●●●●●●●21:00
Mon 7 Jun 15%●●●●●●●●●●21:00
Tue 8 Jun 24%●●●●●●●●●●21:00
Wed 9 Jun 35%●●●●●●●●●●21:00
Thu 10 Jun 46%●●●●●●●●●●21:00
Fri 11 Jun 58%●●●●●●●●●●21:00
Sat 12 Jun 68%●●●●●●●●●●21:00
Sun 13 Jun 78%●●●●●●●●●●21:00
Mon 14 Jun 86%●●●●●●●●●●21:00
Tue 15 Jun 92%●●●●●●●●●●21:00
Wed 16 Jun 97%●●●●●●●●●●21:00
Thu 17 Jun 99%●●●●●●●●●●19:00
Fri 18 Jun 100%●●●●●●●●●●19:00
Sat 19 Jun 99%●●●●●●●●●●19:00
Sun 20 Jun 96%●●●●●●●●●●19:00
Mon 21 Jun 91%●●●●●●●●●●21:00
Tue 22 Jun 85%●●●●●●●●●●21:00
Wed 23 Jun 77%●●●●●●●●●●21:00
Thu 24 Jun 69%●●●●●●●●●●21:00
Fri 25 Jun 59%●●●●●●●●●●21:00
Sat 26 Jun 49%●●●●●●●●●●21:00
Sun 27 Jun 39%●●●●●●●●●●21:00
Mon 28 Jun 29%●●●●●●●●●●21:00
Tue 29 Jun 20%●●●●●●●●●●21:00
Wed 30 Jun 12%●●●●●●●●●●21:00

Check one night in detail Mosquito Bay tours

Questions

What are the best nights to see the bioluminescence at Mosquito Bay in June 2027?

The darkest nights are Tue 1 Jun, Wed 2 Jun, Thu 3 Jun, Fri 4 Jun, Sat 5 Jun, Sun 6 Jun, Mon 7 Jun, Thu 24 Jun, Fri 25 Jun, Sat 26 Jun and more. 16 of 30 nights score at least 4 out of 5.

Which nights should I avoid in June 2027?

Avoid the nights around the full moon on Fri 18 Jun, when moonlight washes out the glow.

19:00 or 21:00: which Mosquito Bay tour is darker in June?

19:00 is the darker choice on 0 nights; 21:00 is the darker choice on 18 nights.

Mosquito Bay darkness by month

Darkness score 1-5 per tour slot from twilight and moonlight. Weather and plankton health are not included. Times are local (America/Puerto_Rico).