The best time to see Blue Tears of Matsu in 2027 is April to September 2027.
Timing status: Natural timing window.
Bioluminescence · April to September 2027
Annual · spring-summer
The islands where the sea glows blue.
From spring into summer the water around Matsu fills with dinoflagellates that flash blue when disturbed, and the surest place to see it is inside a Cold War military tunnel, where each oar stroke drags streaks of light through the dark. New-moon weeks are the honest bet; peak density runs April to June.
best odds: New-moon nights, April to June
Where it is visible: Matsu Islands, Taiwan
Fog cancels Matsu flights often enough to warrant buffer days. Time the trip to a new moon for the best odds.
Blue Tears of Matsu 2027: April to September 2027.
Trailwind finds the moment a trip is unusually possible: the right season, a cheap fare, your open dates, and rare skies. Browse by calendar: