What time of year can you see bioluminescent plankton in Thailand?

Coming to Railay Beach, Krabi during the high season (November to April) can increase your chances of seeing the plankton. Going on a clear, moonless night is highly recommended.
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The bioluminescent plankton are easier to see during the time just before, during, and just after the start of the new moon because it’s darkest. So, the best times of 2023 will be during November and December of 2023, but really anytime around a new moon can produce the awesome result you’re looking for!
 
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New Moon Dates for 2023
Come 1-2 days before, during, or 1-2 days after the new moon phase and you will have the best chances of seeing the plankton glowing blue in the water around you.
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January 21, 2023 (come 19-23rd)
February 20, 2023 (come 18-22nd)
March 21, 2023 (come 19-23rd)
April 20, 2023 (come 18-22nd)
May 19, 2023 (come 17-21st)
June 18, 2023 (come 16-20th)
July 17, 2023 (come 15-19th)
August 16, 2023 (come 14-18th)
September 14, 2023 (come 12-16th)
October 14, 2023 (come 12-16th)
November 13, 2023 (come 11-15th)
December 12, 2023 (come 10-14th)