Mosquito Bay in August 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.
14 pitch-dark nights, 16 dark nights
New moon Mon 2 Aug, Tue 31 Aug · Full moon Tue 17 Aug
Night by night, August 2027
| Night | Moon | 19:00 | 21:00 | Best |
|---|---|---|---|---|
| Sun 1 Aug | 0% | ●●●●● | ●●●●● | 21:00 |
| Mon 2 Aug | 1% | ●●●●● | ●●●●● | 21:00 |
| Tue 3 Aug | 4% | ●●●●● | ●●●●● | 21:00 |
| Wed 4 Aug | 10% | ●●●●● | ●●●●● | 21:00 |
| Thu 5 Aug | 18% | ●●●●● | ●●●●● | 21:00 |
| Fri 6 Aug | 28% | ●●●●● | ●●●●● | 21:00 |
| Sat 7 Aug | 38% | ●●●●● | ●●●●● | 21:00 |
| Sun 8 Aug | 49% | ●●●●● | ●●●●● | 21:00 |
| Mon 9 Aug | 59% | ●●●●● | ●●●●● | 21:00 |
| Tue 10 Aug | 69% | ●●●●● | ●●●●● | 21:00 |
| Wed 11 Aug | 78% | ●●●●● | ●●●●● | 21:00 |
| Thu 12 Aug | 85% | ●●●●● | ●●●●● | 21:00 |
| Fri 13 Aug | 91% | ●●●●● | ●●●●● | 21:00 |
| Sat 14 Aug | 96% | ●●●●● | ●●●●● | 21:00 |
| Sun 15 Aug | 99% | ●●●●● | ●●●●● | 19:00 |
| Mon 16 Aug | 100% | ●●●●● | ●●●●● | 19:00 |
| Tue 17 Aug | 99% | ●●●●● | ●●●●● | 19:00 |
| Wed 18 Aug | 97% | ●●●●● | ●●●●● | 19:00 |
| Thu 19 Aug | 93% | ●●●●● | ●●●●● | 19:00 |
| Fri 20 Aug | 87% | ●●●●● | ●●●●● | 19:00 |
| Sat 21 Aug | 79% | ●●●●● | ●●●●● | 21:00 |
| Sun 22 Aug | 70% | ●●●●● | ●●●●● | 21:00 |
| Mon 23 Aug | 59% | ●●●●● | ●●●●● | 21:00 |
| Tue 24 Aug | 48% | ●●●●● | ●●●●● | 21:00 |
| Wed 25 Aug | 37% | ●●●●● | ●●●●● | 21:00 |
| Thu 26 Aug | 26% | ●●●●● | ●●●●● | 21:00 |
| Fri 27 Aug | 17% | ●●●●● | ●●●●● | 21:00 |
| Sat 28 Aug | 9% | ●●●●● | ●●●●● | 21:00 |
| Sun 29 Aug | 3% | ●●●●● | ●●●●● | 21:00 |
| Mon 30 Aug | 0% | ●●●●● | ●●●●● | 21:00 |
| Tue 31 Aug | 0% | ●●●●● | ●●●●● | 21:00 |
Check one night in detail Mosquito Bay tours
Questions
What are the best nights to see the bioluminescence at Mosquito Bay in August 2027?
The darkest nights are Sun 1 Aug, Mon 2 Aug, Tue 3 Aug, Wed 4 Aug, Thu 5 Aug, Mon 23 Aug, Tue 24 Aug, Wed 25 Aug, Thu 26 Aug, Fri 27 Aug and more. 16 of 31 nights score at least 4 out of 5.
Which nights should I avoid in August 2027?
Avoid the nights around the full moon on Tue 17 Aug, when moonlight washes out the glow.
19:00 or 21:00: which Mosquito Bay tour is darker in August?
19:00 is the darker choice on 0 nights; 21:00 is the darker choice on 18 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).