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.
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.
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Live Social Heatmaps
See exactly where the swarms are right now. The Gnatcast algorithm is backed by live crowdsourced BiteReps from users in your area.
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The 72-Hour Timeline
Plan your weekend with the Biting Gnat Index. See a visually color-coded timeline predicting exactly when the wind will die down and the swarms will peak over the next 3 days.
Gnatcast for Business
Do you manage a Golf Course, Marina, or Coastal Resort? Stop letting no-see-ums ruin your guest experience. Embed the live Gnatcast Risk Widget directly onto your company website so your visitors know exactly when to bring the bug spray.
Live Widget Preview
Biting Gnat Index
Hilton Head Island
88
High Risk
Wind: Calm (2mph)Tide: Low
Swarm conditions. DEET or Thermacell strongly recommended.