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Mosquito Bay in October 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.

17 pitch-dark nights, 18 dark nights

New moon Fri 29 Oct · Full moon Fri 15 Oct

Night by night, October 2027

NightMoon19:0021:00Best
Fri 1 Oct 6%●●●●●●●●●●21:00
Sat 2 Oct 12%●●●●●●●●●●21:00
Sun 3 Oct 19%●●●●●●●●●●21:00
Mon 4 Oct 28%●●●●●●●●●●21:00
Tue 5 Oct 37%●●●●●●●●●●21:00
Wed 6 Oct 47%●●●●●●●●●●21:00
Thu 7 Oct 57%●●●●●●●●●●21:00
Fri 8 Oct 66%●●●●●●●●●●21:00
Sat 9 Oct 74%●●●●●●●●●●21:00
Sun 10 Oct 82%●●●●●●●●●●21:00
Mon 11 Oct 89%●●●●●●●●●●21:00
Tue 12 Oct 94%●●●●●●●●●●21:00
Wed 13 Oct 98%●●●●●●●●●●21:00
Thu 14 Oct 100%●●●●●●●●●●19:00
Fri 15 Oct 100%●●●●●●●●●●19:00
Sat 16 Oct 97%●●●●●●●●●●19:00
Sun 17 Oct 93%●●●●●●●●●●19:00
Mon 18 Oct 86%●●●●●●●●●●19:00
Tue 19 Oct 78%●●●●●●●●●●19:00
Wed 20 Oct 68%●●●●●●●●●●19:00
Thu 21 Oct 56%●●●●●●●●●●21:00
Fri 22 Oct 44%●●●●●●●●●●21:00
Sat 23 Oct 33%●●●●●●●●●●21:00
Sun 24 Oct 22%●●●●●●●●●●21:00
Mon 25 Oct 13%●●●●●●●●●●21:00
Tue 26 Oct 7%●●●●●●●●●●21:00
Wed 27 Oct 2%●●●●●●●●●●21:00
Thu 28 Oct 0%●●●●●●●●●●21:00
Fri 29 Oct 1%●●●●●●●●●●21:00
Sat 30 Oct 4%●●●●●●●●●●21:00
Sun 31 Oct 8%●●●●●●●●●●21:00

Check one night in detail Mosquito Bay tours

Questions

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

The darkest nights are Fri 1 Oct, Sat 2 Oct, Sun 3 Oct, Mon 4 Oct, Tue 19 Oct, Wed 20 Oct, Thu 21 Oct, Fri 22 Oct, Sat 23 Oct, Sun 24 Oct and more. 18 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.

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

19:00 is the darker choice on 3 nights; 21:00 is the darker choice on 17 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).