Viewing advice
Fog cancels Matsu flights often enough to warrant buffer days. Time the trip to a new moon for the best odds.
The best time to see Blue Tears of Matsu in 2027 is April to September 2027. Timing status: Season.
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.
Where to see it
These are the spots that catch it best. Tap one to see what's worth a trip nearby.
Cosmic events during this window
Cosmic events that peak while this season is on, so one trip could catch both. Meteor showers show the moon, since a dark sky is what makes them.
Related natural events
More moments to explore.
Frequently asked questions
When is Blue Tears of Matsu 2027?
Blue Tears of Matsu 2027: April to September 2027.