PRIMARY
Official API ↗NOAA CO-OPS
Tide predictions and observed water levels at curated stations.
What we query, what we derive, and what we refuse to infer.
Live pages use bounded server-side proxies so the browser never needs a private key. Each result includes retrieval time and source status.
PRIMARY
API docs ↗National Weather Service
Short-range point forecasts and active official alerts.
LIVE OBSERVATION
Realtime files ↗NOAA NDBC
Realtime buoy wave, wind and water-temperature observations where the station reports them.
PUBLIC OBSERVATION
API docs ↗iNaturalist
Recent research-grade marine mammal observations used only as a reporting pulse.
CONTEXT
Event API ↗USGS Earthquake Hazards
Recent regional earthquake context. This is not used as a tsunami prediction.
LOCAL CALCULATION
Method →Sun / daylight
Sunrise and sunset are calculated from date, latitude and longitude. No external “golden hour” score is copied.
Sources discussed but not silently normalized
Beach-water advisories, harmful algal bloom products, park access and state wildlife schedules vary by jurisdiction and data contract. We link or integrate them only when a stable, reusable source can be mapped without inventing a national “safe beach” status. That restraint is part of the product.
Failure behavior
A failed source returns a partial-state label. Cached results are short-lived and carry their retrieval time. Missing data is never converted into a zero-risk or high-quality verdict.