Watch: Glencairn Beach glows with luminous blue light

Posted on 29 August 2025 By Lee-Ann Steyn

Residents and nighttime beachgoers were treated to a spectacular natural display as the waters off Glencairn, Cape Town, lit up in vivid shades of blue.

Picture: Christoff Theunissen / Supplied via Cape (town) Etc

The phenomenon, caused by bioluminescence, the emission of light during a chemiluminescence reaction by living organisms, transformed the choppy waves into a glowing spectacle on Tuesday night and into the early hours of Wednesday morning, as Christoff Theunissen revealed via Facebook.

The bright, flickering lights danced across the waves, creating an otherworldly scene that left locals and visitors alike in awe of this rare marine light show.

Article shared by Cape Town ETC 

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