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Manialtepec Lagoon in May 2027: darkest nights

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

16 pitch-dark nights, 18 dark nights

New moon Thu 6 May · Full moon Thu 20 May

Night by night, May 2027

NightMoon19:3021:00Best
Sat 1 May 19%●●●●●●●●●●21:00
Sun 2 May 12%●●●●●●●●●●21:00
Mon 3 May 6%●●●●●●●●●●21:00
Tue 4 May 2%●●●●●●●●●●21:00
Wed 5 May 0%●●●●●●●●●●21:00
Thu 6 May 1%●●●●●●●●●●21:00
Fri 7 May 4%●●●●●●●●●●21:00
Sat 8 May 10%●●●●●●●●●●21:00
Sun 9 May 18%●●●●●●●●●●21:00
Mon 10 May 28%●●●●●●●●●●21:00
Tue 11 May 39%●●●●●●●●●●21:00
Wed 12 May 51%●●●●●●●●●●21:00
Thu 13 May 62%●●●●●●●●●●21:00
Fri 14 May 73%●●●●●●●●●●21:00
Sat 15 May 82%●●●●●●●●●●21:00
Sun 16 May 90%●●●●●●●●●●21:00
Mon 17 May 95%●●●●●●●●●●21:00
Tue 18 May 99%●●●●●●●●●●19:30
Wed 19 May 100%●●●●●●●●●●19:30
Thu 20 May 99%●●●●●●●●●●19:30
Fri 21 May 96%●●●●●●●●●●19:30
Sat 22 May 92%●●●●●●●●●●19:30
Sun 23 May 86%●●●●●●●●●●21:00
Mon 24 May 79%●●●●●●●●●●21:00
Tue 25 May 71%●●●●●●●●●●21:00
Wed 26 May 62%●●●●●●●●●●21:00
Thu 27 May 52%●●●●●●●●●●21:00
Fri 28 May 43%●●●●●●●●●●21:00
Sat 29 May 33%●●●●●●●●●●21:00
Sun 30 May 24%●●●●●●●●●●21:00
Mon 31 May 16%●●●●●●●●●●21:00

Check one night in detail Manialtepec Lagoon tours

Questions

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

The darkest nights are Sat 1 May, Sun 2 May, Mon 3 May, Tue 4 May, Wed 5 May, Thu 6 May, Fri 7 May, Sat 8 May, Mon 24 May, Tue 25 May and more. 18 of 31 nights score at least 4 out of 5.

Which nights should I avoid in May 2027?

Avoid the nights around the full moon on Thu 20 May, when moonlight washes out the glow.

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

19:30 is the darker choice on 1 nights; 21:00 is the darker choice on 19 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).