Thematic Field Guide · Year-Round New-Moon Windows · Peak Warmth May – October
Oceans & watersBioluminescent Bays: How Lunar Ephemeris & Rainfall Control the Glow
Planning moonless nights across Puerto Rico, California, Australia, and Japan.
Marine bioluminescence requires two things to align: a dense, healthy population of dinoflagellates (or spawning firefly squid) and an unlit sky. Even the brightest bloom in Mosquito Bay or Tomales Bay looks faint under a gibbous moon or immediately after heavy tropical rain dilutes lagoon salinity.
How to time this phenomenon
- Always inspect the Lunar Illumination percentage on Flaurora before booking a kayak tour—aim for nights under 15% illumination or nights when moonrise occurs after 23:00.
- Watch the 3-day precipitation forecast: heavy freshwater runoff temporarily flushes shallow mangrove lagoons and lowers surface salinity.
- In temperate bays like Tomales Bay (California) and Jervis Bay (Australia), late-summer and early-autumn warm water stability produces the strongest dinoflagellate concentrations.
Safety & responsible visiting
- Never wear DEET insect repellent, chemical sunscreen, or skin lotions into a bioluminescent bay—rinse off in freshwater before boarding a kayak.
- Use only licensed eco-operators who enforce no-motor, no-white-light rules inside fragile mangrove channels.
Live readiness across this trail
4 tracked destinations
- Marine Bioluminescence
39
Mosquito Bay, Vieques
Puerto Rico
DecliningHigh confidencePeak was 117 days ago
World-renowned Pyrodinium bahamense mangrove bay on Vieques Island.
- Marine Bioluminescence
0
Tomales Bay
United States
EndedHigh confidenceSeason closed 15 days ago. Next opens in 234 days
Sheltered Point Reyes paddle route glowing during late-summer and autumn upwelling.
- Marine Bioluminescence
2
Jervis Bay
Australia
DormantHigh confidenceSeason opens in 6 days
Austral summer Noctiluca scintillans blooms along white-sand New South Wales coves.
- Marine Bioluminescence
0
Toyama Bay
Japan
DormantHigh confidenceSeason opens in 126 days
Springtime cobalt-blue bioluminescence from spawning Watasenia scintillans squid.
More field guides
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Spring Bloom & Southern Hemisphere Dark Skies
Tracking cherry blossom degree days, bulb rows, desert superblooms, and the Eta Aquariids.
summer Guide
Summer High-Meadows, Lavender & Perseid Dark Skies
High-altitude snowmelt flora, Provençal harvests, and August's premier meteor stream.
autumn Guide
Autumn Canopy & The Monarch Migration Flyway
Tracking deciduous color waves alongside North America's great butterfly migration.
winter Guide
Winter Aurora Oval & Geminid Dark Skies
Geomagnetic storms under polar night and December's 120-ZHR Geminid meteor shower.
Phase 3 · Validation & roadmap priorities
Which phenomena and destinations should Flaurora track next?
We only launch a phenomenon once we can verify an authoritative observation or forecast feed. Vote on candidate Phase 4 categories below or suggest a specific destination for source validation.
Snowmelt Waterfalls & River Peak Flow
Yosemite Valley, Lauterbrunnen, and Nordic snowmelt discharge peaks in late spring.
Target feed: USGS National Water Information System (NWIS) streamgauges
Volcanic Activity & Geothermal Landscapes
Official alert levels, aviation color codes, and safe viewing perimeters.
Target feed: USGS Volcano Hazards Program & IMO Iceland official advisories
Whale Migration & Coastal Sightings
Humpback, gray, and southern right whale coastal migration corridors.
Target feed: NOAA Fisheries, Happywhale & regional marine sanctuaries
Marine Bioluminescence Bays & Shores
Dinoflagellate and ostracod dark-moon windows in Puerto Rico, Tomales Bay, and Jervis Bay.
Target feed: New-moon ephemeris, SST anomalies & reserve monitoring
Synchronous Fireflies
Great Smoky Mountains, Congaree, and Japanese genji-botaru river valleys.
Target feed: Accumulated GDD (base 10°C) & NPS park lottery windows
Glacier Calving & Seasonal Lake Ice
Perito Moreno, Ilulissat Icefjord, and Lake Baikal winter freeze/breakup.
Target feed: NSIDC, Copernicus cryosphere & national park ice telemetry
Request a destination or phenomenon
Tell us what natural event you are planning around and how you use Flaurora.