One score for the whole beach day. Swell distills live marine and weather data into a single 0–100 Beach Score for every US beach, refreshed every 15 minutes.
The Beach Score weighs seven live conditions: temperature, waves, wind, rain, sun & UV, air quality, and daylight.
The score is multiplicative, so one poor condition drags the whole day down — a high score means everything is working together. 91–100 is perfect, 66–90 is a great day, 41–65 is fair, and 0–40 means something is working against you.
Beyond the overall score, Swell rates 16 activities 0–5 — from swimming and surfing to fishing and family days — because the best beach depends on what you want to do.
Every score factors in live air quality (AQI), blending a global model with the nearest ground monitor so wildfire smoke isn't smoothed away.
Live marine and weather data from Open-Meteo and tide predictions from NOAA, refreshed every 15 minutes.