The Great Circle Forecast API provides weather forecasts primarily for sailing races. Data returned includes wind, pressure, temperature, precipitations, sea currents, etc. for a specified location. These forecasts can be computed for every location on the planet, with time interval varying from 1 minute to 3 hours and up to a horizon of 7 days into the future. Great Circle-Squid is a world-leading provider of marine weather services, both for race management and sailors (skippers and navigators).