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Holbox bioluminescence in September 2027: darkest nights

Plankton glows along the lagoon shore and Punta Cocos. Very sensitive to moonlight. Best June to October, warm water.

16 pitch-dark nights, 18 dark nights

New moon Wed 29 Sep · Full moon Wed 15 Sep

Night by night, September 2027

NightMoon20:0022:00Best
Wed 1 Sep 3%●●●●●●●●●●22:00
Thu 2 Sep 8%●●●●●●●●●●22:00
Fri 3 Sep 15%●●●●●●●●●●22:00
Sat 4 Sep 24%●●●●●●●●●●22:00
Sun 5 Sep 34%●●●●●●●●●●22:00
Mon 6 Sep 44%●●●●●●●●●●22:00
Tue 7 Sep 54%●●●●●●●●●●22:00
Wed 8 Sep 63%●●●●●●●●●●22:00
Thu 9 Sep 72%●●●●●●●●●●22:00
Fri 10 Sep 80%●●●●●●●●●●22:00
Sat 11 Sep 87%●●●●●●●●●●22:00
Sun 12 Sep 93%●●●●●●●●●●22:00
Mon 13 Sep 97%●●●●●●●●●●20:00
Tue 14 Sep 99%●●●●●●●●●●20:00
Wed 15 Sep 100%●●●●●●●●●●20:00
Thu 16 Sep 99%●●●●●●●●●●20:00
Fri 17 Sep 95%●●●●●●●●●●20:00
Sat 18 Sep 90%●●●●●●●●●●20:00
Sun 19 Sep 83%●●●●●●●●●●20:00
Mon 20 Sep 74%●●●●●●●●●●20:00
Tue 21 Sep 63%●●●●●●●●●●20:00
Wed 22 Sep 52%●●●●●●●●●●22:00
Thu 23 Sep 40%●●●●●●●●●●22:00
Fri 24 Sep 29%●●●●●●●●●●22:00
Sat 25 Sep 19%●●●●●●●●●●20:00
Sun 26 Sep 11%●●●●●●●●●●20:00
Mon 27 Sep 5%●●●●●●●●●●20:00
Tue 28 Sep 1%●●●●●●●●●●20:00
Wed 29 Sep 0%●●●●●●●●●●20:00
Thu 30 Sep 2%●●●●●●●●●●20:00

Check one night in detail Holbox bioluminescence tours

Questions

What are the best nights to see the bioluminescence at Holbox bioluminescence in September 2027?

The darkest nights are Wed 1 Sep, Thu 2 Sep, Fri 3 Sep, Sat 4 Sep, Sun 5 Sep, Mon 20 Sep, Tue 21 Sep, Wed 22 Sep, Thu 23 Sep, Fri 24 Sep and more. 18 of 30 nights score at least 4 out of 5.

Which nights should I avoid in September 2027?

Avoid the nights around the full moon on Wed 15 Sep, when moonlight washes out the glow.

20:00 or 22:00: which Holbox bioluminescence tour is darker in September?

20:00 is the darker choice on 9 nights; 22:00 is the darker choice on 10 nights.

Holbox bioluminescence 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/Cancun).