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Holbox bioluminescence in July 2027: darkest nights

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

15 pitch-dark nights, 16 dark nights

New moon Sat 3 Jul · Full moon Sun 18 Jul

Night by night, July 2027

NightMoon20:0022:00Best
Thu 1 Jul 5%●●●●●●●●●●22:00
Fri 2 Jul 1%●●●●●●●●●●22:00
Sat 3 Jul 0%●●●●●●●●●●22:00
Sun 4 Jul 2%●●●●●●●●●●22:00
Mon 5 Jul 6%●●●●●●●●●●22:00
Tue 6 Jul 13%●●●●●●●●●●22:00
Wed 7 Jul 22%●●●●●●●●●●22:00
Thu 8 Jul 32%●●●●●●●●●●22:00
Fri 9 Jul 43%●●●●●●●●●●22:00
Sat 10 Jul 54%●●●●●●●●●●22:00
Sun 11 Jul 65%●●●●●●●●●●22:00
Mon 12 Jul 74%●●●●●●●●●●22:00
Tue 13 Jul 83%●●●●●●●●●●22:00
Wed 14 Jul 90%●●●●●●●●●●22:00
Thu 15 Jul 95%●●●●●●●●●●20:00
Fri 16 Jul 98%●●●●●●●●●●20:00
Sat 17 Jul 100%●●●●●●●●●●20:00
Sun 18 Jul 100%●●●●●●●●●●20:00
Mon 19 Jul 98%●●●●●●●●●●20:00
Tue 20 Jul 94%●●●●●●●●●●20:00
Wed 21 Jul 89%●●●●●●●●●●20:00
Thu 22 Jul 82%●●●●●●●●●●20:00
Fri 23 Jul 74%●●●●●●●●●●20:00
Sat 24 Jul 64%●●●●●●●●●●22:00
Sun 25 Jul 54%●●●●●●●●●●22:00
Mon 26 Jul 43%●●●●●●●●●●22:00
Tue 27 Jul 33%●●●●●●●●●●22:00
Wed 28 Jul 22%●●●●●●●●●●22:00
Thu 29 Jul 14%●●●●●●●●●●22:00
Fri 30 Jul 7%●●●●●●●●●●22:00
Sat 31 Jul 2%●●●●●●●●●●22:00

Check one night in detail Holbox bioluminescence tours

Questions

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

The darkest nights are Thu 1 Jul, Fri 2 Jul, Sat 3 Jul, Sun 4 Jul, Mon 5 Jul, Tue 6 Jul, Wed 7 Jul, Sat 24 Jul, Sun 25 Jul, Mon 26 Jul and more. 16 of 31 nights score at least 4 out of 5.

Which nights should I avoid in July 2027?

Avoid the nights around the full moon on Sun 18 Jul, when moonlight washes out the glow.

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

20:00 is the darker choice on 4 nights; 22:00 is the darker choice on 17 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).