The Blue Tears of Matsu, a natural wonder voted by CNN as one of the world’s 15 most spectacular sights, attracts tens of thousands of pilgrims every year. Those blue fluorescent lights twinkling on the dark sea surface seem like tears shed by the ocean, dreamy and incredible. However, the Blue Tears are not always visible; they require a perfect combination of timing, location, and conditions. This article integrates authoritative sources to provide you with the most complete, scientific, and practical guide to the Blue Tears of Matsu.
Video: The Phenomenon of Blue Tears (Source: YouTube)
📖 Table of Contents
Chapter 1: Month-by-Month Analysis of Blue Tears of Matsu
The month is the key to seeing the Blue Tears. According to the Matsu National Scenic Area Administration and authoritative data, the main viewing season is from April to September, but the probability and characteristics vary greatly each month.
💧 Interactive: Blue Tears Probability Predictor
Select your travel month and lunar date to analyze your success rate!
Detailed Monthly Analysis
| Month | Probability | Characteristics & Expert Advice |
|---|---|---|
| April | ★★★★☆ | Season Starts: Misty rain, weakening northeast monsoon. Weather is chilly; bring rain gear and warm clothes. Fewer tourists, good for quiet viewing. |
| May | ★★★★★ | Peak Outbreak: Pre-plum rain season, water warms up, Noctiluca scintillans multiply. Highest success rate, but flights/hotels must be booked early. |
| June | ★★★★★ | Continued Peak: Plum rain season. Despite high rain probability, Blue Tears remain active. Watch weather forecasts closely. |
| Jul-Aug | ★★★★☆ | Summer Stability: Summer peak, high water temp. Watch out for typhoons; sea conditions before/after typhoons may affect sightings. |
| September | ★★☆☆☆ | Season Ends: Northeast monsoon picks up, numbers decrease. Good chance to see another glowing organism, ‘Star Sand’ (Ostracods). |
Chapter 2: Best Viewing Time and Moon Phase
Besides the month, the daily viewing time and moon phase are decisive factors. According to experts:
Best Daily Time Slots
- 20:00 – 21:30 (First Peak): The sky is completely dark. Golden time for most tourists and photography.
- 21:30 – 23:00 (Late Night): Fewer tourists, quieter environment. Perfect for photographers wanting empty shots.
- Tide Influence: One or two hours before high tide, waves hitting the shore are stronger, stimulating the glow. Check the Central Weather Administration Tide Table.
The Fatal Impact of Moon Phase
“Light pollution” is the killer of Blue Tears, and moonlight is the biggest natural light pollution.
Chapter 3: Recommended Professional Tours
Chasing the tears requires experience. Following a professional guide can significantly increase your chances of seeing the Blue Tears of Matsu.
1. Ninety Road Travel (Small Group Deep Tour)
- Feature: Semi-independent small groups with a track record of “success in 6 minutes.”
- Advantage: Provides photography guidance and stays in unique homestays like Qinbi Banyan Tree.
- Best For: Travelers valuing quality who don’t want to navigate on their own.
2. Beihai Tunnel Rocking Boat (Nangan Must-Do)
- Feature: The only place in Taiwan to see Blue Tears from a boat inside a tunnel. No light pollution; you can see the blue glow just by stirring the water.
- Cost: Approx. NT$300 per adult.
- Best For: Families and visitors during the Full Moon.
🧥 Night Chase Essential: Multi-functional Windproof Towel
Sea breezes can be chilly at night when waiting for Blue Tears. This Peach Honey Multi-functional Towel is lightweight, breathable, and effective against wind. It also repels mosquitoes (common by the sea). Draped over your shoulders, it keeps you warm and bug-free, a high-value item for chasers.
View Gear DetailsChapter 4: Weather Conditions & Gear by Month
Matsu’s weather is changeable, often causing flight cancellations. Understanding the weather helps you pack right.
Spring (Apr-May) – Foggy & Chilly
- Features: Avg temp 18-23°C. Prone to fog.
- Gear: Layered clothing. Windbreaker and rain gear are musts.
Summer (Jun-Aug) – Hot & Typhoons
- Features: Avg temp 26-32°C. Intense sun. Watch out for southwest currents and typhoons.
- Gear: Shorts, short sleeves, but a thin jacket for night riding. Sunscreen is crucial.
Chapter 5: Science & Ecology of Blue Tears
What are Blue Tears?
According to DNA sequencing by Professor Chiang Kuo-ping of National Taiwan Ocean University, the Blue Tears of Matsu are primarily caused by a heterotrophic dinoflagellate called Noctiluca scintillans (Sea Sparkle).
These organisms contain “luciferin” and “luciferase.” When stimulated by waves, boats, or physical agitation, a chemical reaction occurs, emitting a blue cold light for about 0.08 seconds. Millions of them gathering together create the spectacular Blue Tears.
Pollution or Natural Phenomenon?
It was once misunderstood as a sign of pollution. However, recent research indicates it is a natural cycle of the Min River estuary ecosystem. When the Min River brings nutrients, diatoms bloom, and Noctiluca scintillans feed on them. As long as it doesn’t cause a red tide due to eutrophication, it is not directly harmful. Local fishermen call it “Dingxiang Water” because its appearance often heralds the arrival of sardine schools.
Chapter 6: Pro Secrets for Success
🕵️ The 4 Keys: Dark, Waves, Tide, Wind
- Dark (Light Pollution): Choose spots without light pollution; avoid full moons and streetlights.
- Waves (Terrain): Windward sides or rocky shores create stronger wave impacts, making the glow brighter.
- Tide: High water levels around high tide bring Noctiluca closer to shore.
- Wind (Direction): South winds in Apr-May favor south-facing shores (like Tiebao); North winds favor the north.
Chapter 8: Photography Guide
Want dreamy photos? You can’t just snap them with a phone. Here are settings for DSLR and mobile:
📸 DSLR Settings
- Mode: Manual (M)
- Aperture: The larger the better (F2.8+)
- ISO: 1600 – 3200 (Too high creates noise)
- Shutter: 30 seconds (Long exposure captures light trails)
- Focus: Manual focus to infinity
- White Balance: 2500K – 3000K (Cool tones look dreamier)
- Essential: A sturdy tripod
📱 Mobile Photography (iPhone/Android)
Phones can do it too! Use “Pro Mode” or “Night Mode”.
- Extend exposure time to 10-30 seconds.
- Tripod is mandatory; handheld will blur.
- Try “Starry Mode” if available.
🎒 Photographer’s Fortress: NaSaDen Classic Suitcase
Chasing tears requires tripods, lenses, and warm clothes. NaSaDen Suitcase offers huge storage and multiple pockets to protect your valuable gear. With 360-degree silent wheels, you can move easily across Matsu’s slopes without missing a shot.
View Suitcase DealsFAQ: Blue Tears of Matsu
Q: Can I take Blue Tears home?
No. Noctiluca dies quickly outside the ocean and requires specific temperature and nutrients. Please enjoy them on-site.
Q: Why are my photos just black?
Because the light is faint. Cameras need sufficient “exposure time” to accumulate light. Without a tripod and long exposure (slow shutter), you won’t capture them.
Read More: Deep Dive into Matsu
Matsu Islands Travel Guide
Return to the main page to explore other attractions in the four townships.
[External] Matsu Blue Tears Ecological Museum
Official site info for booking indoor viewing experiences.
[External] The Occasional Traveller Guide
Comprehensive English guide on chasing the Blue Tears.