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Indian River Lagoon at Merritt Island in September 2027: darkest nights

Kayak tours from Haulover Canal. Manatees and dolphins light up the water as they move. Dinoflagellates June to September; comb jellies glow in winter.

15 pitch-dark nights, 16 dark nights

New moon Wed 29 Sep · Full moon Wed 15 Sep

Night by night, September 2027

NightMoon20:3021:30Best
Wed 1 Sep 3%●●●●●●●●●●21:30
Thu 2 Sep 8%●●●●●●●●●●21:30
Fri 3 Sep 15%●●●●●●●●●●21:30
Sat 4 Sep 24%●●●●●●●●●●21:30
Sun 5 Sep 33%●●●●●●●●●●21:30
Mon 6 Sep 43%●●●●●●●●●●21:30
Tue 7 Sep 53%●●●●●●●●●●21:30
Wed 8 Sep 63%●●●●●●●●●●21:30
Thu 9 Sep 72%●●●●●●●●●●21:30
Fri 10 Sep 80%●●●●●●●●●●21:30
Sat 11 Sep 87%●●●●●●●●●●21:30
Sun 12 Sep 93%●●●●●●●●●●20:30
Mon 13 Sep 97%●●●●●●●●●●20:30
Tue 14 Sep 99%●●●●●●●●●●20:30
Wed 15 Sep 100%●●●●●●●●●●20:30
Thu 16 Sep 99%●●●●●●●●●●20:30
Fri 17 Sep 95%●●●●●●●●●●20:30
Sat 18 Sep 90%●●●●●●●●●●20:30
Sun 19 Sep 83%●●●●●●●●●●20:30
Mon 20 Sep 74%●●●●●●●●●●20:30
Tue 21 Sep 64%●●●●●●●●●●21:30
Wed 22 Sep 52%●●●●●●●●●●21:30
Thu 23 Sep 41%●●●●●●●●●●21:30
Fri 24 Sep 30%●●●●●●●●●●21:30
Sat 25 Sep 19%●●●●●●●●●●21:30
Sun 26 Sep 11%●●●●●●●●●●21:30
Mon 27 Sep 5%●●●●●●●●●●21:30
Tue 28 Sep 1%●●●●●●●●●●21:30
Wed 29 Sep 0%●●●●●●●●●●21:30
Thu 30 Sep 2%●●●●●●●●●●21:30

Check one night in detail Indian River Lagoon at Merritt Island tours

Questions

What are the best nights to see the bioluminescence at Indian River Lagoon at Merritt Island 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. 16 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.

20:30 or 21:30: which Indian River Lagoon at Merritt Island tour is darker in September?

20:30 is the darker choice on 2 nights; 21:30 is the darker choice on 16 nights.

Indian River Lagoon at Merritt Island 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/New_York).