NOAA observed water levels
Where U.S. high-tide flooding grew fastest, 2000–2025
A reproducible NOAA station analysis comparing five-year averages at 71 U.S. coastal gauges, with the full dataset and methodology.
Published
Read the report →Original research
Coastal data reports
Perigee turns public NOAA observations and predictions into transparent, reproducible coastal research. Every report leads with the answer, publishes its limits, links the local stations, and includes reusable data.
NOAA harmonic predictions
2026 U.S. king tide dates
Representative peak dates, local times, predicted heights, and top-tide windows at 29 NOAA reference stations.
Published
Read the report →What makes these reports reproducible
The published findings come from checked-in data snapshots generated directly from official NOAA services. Methodology, data-completeness rules, source endpoints, station IDs, and downloadable CSV files stay visible so readers can inspect the result instead of trusting an unexplained ranking.