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Manialtepec Lagoon in September 2027: darkest nights

Swimming in the glowing water is allowed from the boats. Best August to December.

15 pitch-dark nights, 17 dark nights

New moon Wed 29 Sep · Full moon Wed 15 Sep

Night by night, September 2027

NightMoon19:3021:00Best
Wed 1 Sep 3%●●●●●●●●●●21:00
Thu 2 Sep 9%●●●●●●●●●●21:00
Fri 3 Sep 16%●●●●●●●●●●21:00
Sat 4 Sep 24%●●●●●●●●●●21:00
Sun 5 Sep 34%●●●●●●●●●●21:00
Mon 6 Sep 44%●●●●●●●●●●21:00
Tue 7 Sep 54%●●●●●●●●●●21:00
Wed 8 Sep 64%●●●●●●●●●●21:00
Thu 9 Sep 73%●●●●●●●●●●21:00
Fri 10 Sep 81%●●●●●●●●●●21:00
Sat 11 Sep 88%●●●●●●●●●●21:00
Sun 12 Sep 93%●●●●●●●●●●21:00
Mon 13 Sep 97%●●●●●●●●●●19:30
Tue 14 Sep 99%●●●●●●●●●●19:30
Wed 15 Sep 100%●●●●●●●●●●19:30
Thu 16 Sep 98%●●●●●●●●●●19:30
Fri 17 Sep 95%●●●●●●●●●●19:30
Sat 18 Sep 90%●●●●●●●●●●19:30
Sun 19 Sep 82%●●●●●●●●●●19:30
Mon 20 Sep 73%●●●●●●●●●●19:30
Tue 21 Sep 63%●●●●●●●●●●21:00
Wed 22 Sep 52%●●●●●●●●●●21:00
Thu 23 Sep 40%●●●●●●●●●●21:00
Fri 24 Sep 29%●●●●●●●●●●21:00
Sat 25 Sep 19%●●●●●●●●●●21:00
Sun 26 Sep 10%●●●●●●●●●●21:00
Mon 27 Sep 4%●●●●●●●●●●21:00
Tue 28 Sep 1%●●●●●●●●●●21:00
Wed 29 Sep 0%●●●●●●●●●●21:00
Thu 30 Sep 2%●●●●●●●●●●21:00

Check one night in detail Manialtepec Lagoon tours

Questions

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

The darkest nights are Wed 1 Sep, Thu 2 Sep, Fri 3 Sep, Sat 4 Sep, Mon 20 Sep, Tue 21 Sep, Wed 22 Sep, Thu 23 Sep, Fri 24 Sep, Sat 25 Sep and more. 17 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.

19:30 or 21:00: which Manialtepec Lagoon tour is darker in September?

19:30 is the darker choice on 3 nights; 21:00 is the darker choice on 16 nights.

Manialtepec Lagoon 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/Mexico_City).