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Koh Rong plankton in August 2027: darkest nights

Swim off Long Set Beach or from night boat trips on Koh Rong Samloem. Year-round; best in the dry season.

17 pitch-dark nights, 18 dark nights

New moon Mon 2 Aug, Wed 1 Sep · Full moon Tue 17 Aug

Night by night, August 2027

NightMoon20:0022:00Best
Sun 1 Aug 1%●●●●●●●●●●20:00
Mon 2 Aug 0%●●●●●●●●●●20:00
Tue 3 Aug 2%●●●●●●●●●●20:00
Wed 4 Aug 7%●●●●●●●●●●22:00
Thu 5 Aug 14%●●●●●●●●●●22:00
Fri 6 Aug 23%●●●●●●●●●●22:00
Sat 7 Aug 33%●●●●●●●●●●22:00
Sun 8 Aug 44%●●●●●●●●●●22:00
Mon 9 Aug 54%●●●●●●●●●●22:00
Tue 10 Aug 64%●●●●●●●●●●22:00
Wed 11 Aug 74%●●●●●●●●●●22:00
Thu 12 Aug 82%●●●●●●●●●●20:00
Fri 13 Aug 89%●●●●●●●●●●20:00
Sat 14 Aug 94%●●●●●●●●●●20:00
Sun 15 Aug 98%●●●●●●●●●●20:00
Mon 16 Aug 100%●●●●●●●●●●20:00
Tue 17 Aug 100%●●●●●●●●●●20:00
Wed 18 Aug 98%●●●●●●●●●●20:00
Thu 19 Aug 95%●●●●●●●●●●20:00
Fri 20 Aug 90%●●●●●●●●●●20:00
Sat 21 Aug 83%●●●●●●●●●●20:00
Sun 22 Aug 74%●●●●●●●●●●20:00
Mon 23 Aug 64%●●●●●●●●●●20:00
Tue 24 Aug 54%●●●●●●●●●●20:00
Wed 25 Aug 42%●●●●●●●●●●20:00
Thu 26 Aug 31%●●●●●●●●●●20:00
Fri 27 Aug 21%●●●●●●●●●●20:00
Sat 28 Aug 12%●●●●●●●●●●20:00
Sun 29 Aug 6%●●●●●●●●●●20:00
Mon 30 Aug 1%●●●●●●●●●●20:00
Tue 31 Aug 0%●●●●●●●●●●20:00

Check one night in detail Koh Rong plankton tours

Questions

What are the best nights to see the bioluminescence at Koh Rong plankton in August 2027?

The darkest nights are Sun 1 Aug, Mon 2 Aug, Tue 3 Aug, Wed 4 Aug, Thu 5 Aug, Fri 6 Aug, Sat 7 Aug, Sun 22 Aug, Mon 23 Aug, Tue 24 Aug and more. 18 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.

20:00 or 22:00: which Koh Rong plankton tour is darker in August?

20:00 is the darker choice on 14 nights; 22:00 is the darker choice on 6 nights.

Koh Rong plankton darkness by month

Darkness score 1-5 per tour slot from twilight and moonlight. Weather and plankton health are not included. Times are local (Asia/Phnom_Penh).