Gnatcast is the first hyper-local forecasting tool for no-see-ums and sand flies. We use real-time wind speed, UV curves, and NOAA tide data to predict exactly when the swarms will hit.
Get notified the moment we launch in the App Store.
Standard weather apps fail because they ignore the tides. Gnatcast uses real-time NOAA API data to know exactly when the marsh mudflats are exposed.
See exactly where the swarms are right now. The Gnatcast algorithm is backed by live crowdsourced BiteReps from users in your area.
Plan your day with the Biting Gnat Index. See a visually color-coded timeline predicting when the wind will die down and the swarms will peak.