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Jervis Bay in May 2027: darkest nights

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

17 pitch-dark nights, 19 dark nights

New moon Thu 6 May · Full moon Thu 20 May

Night by night, May 2027

NightMoon21:0023:00Best
Sat 1 May 25%●●●●●●●●●●21:00
Sun 2 May 17%●●●●●●●●●●21:00
Mon 3 May 10%●●●●●●●●●●21:00
Tue 4 May 5%●●●●●●●●●●21:00
Wed 5 May 1%●●●●●●●●●●21:00
Thu 6 May 0%●●●●●●●●●●21:00
Fri 7 May 2%●●●●●●●●●●21:00
Sat 8 May 6%●●●●●●●●●●21:00
Sun 9 May 12%●●●●●●●●●●21:00
Mon 10 May 21%●●●●●●●●●●21:00
Tue 11 May 31%●●●●●●●●●●23:00
Wed 12 May 43%●●●●●●●●●●23:00
Thu 13 May 55%●●●●●●●●●●23:00
Fri 14 May 66%●●●●●●●●●●23:00
Sat 15 May 76%●●●●●●●●●●23:00
Sun 16 May 85%●●●●●●●●●●21:00
Mon 17 May 92%●●●●●●●●●●21:00
Tue 18 May 97%●●●●●●●●●●21:00
Wed 19 May 99%●●●●●●●●●●21:00
Thu 20 May 100%●●●●●●●●●●23:00
Fri 21 May 98%●●●●●●●●●●23:00
Sat 22 May 95%●●●●●●●●●●21:00
Sun 23 May 90%●●●●●●●●●●21:00
Mon 24 May 84%●●●●●●●●●●21:00
Tue 25 May 76%●●●●●●●●●●21:00
Wed 26 May 68%●●●●●●●●●●21:00
Thu 27 May 59%●●●●●●●●●●21:00
Fri 28 May 49%●●●●●●●●●●21:00
Sat 29 May 39%●●●●●●●●●●21:00
Sun 30 May 30%●●●●●●●●●●21:00
Mon 31 May 21%●●●●●●●●●●21:00

Check one night in detail Jervis Bay tours

Questions

What are the best nights to see the bioluminescence at Jervis Bay 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, Sun 9 May, Mon 10 May and more. 19 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.

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

21:00 is the darker choice on 16 nights; 23:00 is the darker choice on 3 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).