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Jervis Bay in September 2027: darkest nights

Noctiluca blooms turn Hyams Beach and Callala Bay electric blue. Blooms are short-lived. Sporadic blooms, mostly late spring and summer.

15 pitch-dark nights, 17 dark nights

New moon Thu 30 Sep · Full moon Thu 16 Sep

Night by night, September 2027

NightMoon21:0023:00Best
Wed 1 Sep 1%●●●●●●●●●●21:00
Thu 2 Sep 5%●●●●●●●●●●21:00
Fri 3 Sep 11%●●●●●●●●●●21:00
Sat 4 Sep 19%●●●●●●●●●●23:00
Sun 5 Sep 28%●●●●●●●●●●23:00
Mon 6 Sep 38%●●●●●●●●●●23:00
Tue 7 Sep 48%●●●●●●●●●●23:00
Wed 8 Sep 58%●●●●●●●●●●23:00
Thu 9 Sep 67%●●●●●●●●●●23:00
Fri 10 Sep 76%●●●●●●●●●●23:00
Sat 11 Sep 83%●●●●●●●●●●21:00
Sun 12 Sep 90%●●●●●●●●●●21:00
Mon 13 Sep 95%●●●●●●●●●●21:00
Tue 14 Sep 98%●●●●●●●●●●21:00
Wed 15 Sep 100%●●●●●●●●●●21:00
Thu 16 Sep 100%●●●●●●●●●●21:00
Fri 17 Sep 97%●●●●●●●●●●21:00
Sat 18 Sep 93%●●●●●●●●●●21:00
Sun 19 Sep 87%●●●●●●●●●●21:00
Mon 20 Sep 79%●●●●●●●●●●21:00
Tue 21 Sep 70%●●●●●●●●●●21:00
Wed 22 Sep 59%●●●●●●●●●●21:00
Thu 23 Sep 47%●●●●●●●●●●21:00
Fri 24 Sep 36%●●●●●●●●●●21:00
Sat 25 Sep 25%●●●●●●●●●●21:00
Sun 26 Sep 15%●●●●●●●●●●21:00
Mon 27 Sep 8%●●●●●●●●●●21:00
Tue 28 Sep 3%●●●●●●●●●●21:00
Wed 29 Sep 0%●●●●●●●●●●21:00
Thu 30 Sep 1%●●●●●●●●●●21:00

Check one night in detail Jervis Bay tours

Questions

What are the best nights to see the bioluminescence at Jervis Bay in September 2027?

The darkest nights are Wed 1 Sep, Thu 2 Sep, Fri 3 Sep, Sat 4 Sep, Sun 5 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 Thu 16 Sep, when moonlight washes out the glow.

21:00 or 23:00: which Jervis Bay tour is darker in September?

21:00 is the darker choice on 15 nights; 23:00 is the darker choice on 4 nights.

Jervis 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 (Australia/Sydney).