Sebastian, FL Weather Forecast
Indian River County, Florida
Seven-day outlook
66–82°F across the weekThe week runs between 72° and 82°, with Wednesday the warmest day of it. There is no real trend across it: one day looks much like the next. Monday is the wettest day, peaking near 72%. 3 of the 7 days stay dry.
Forecasts come from the National Weather Service's own computer models, and current conditions from the nearest reporting weather station. Both are served through the weather API. A forecast is guidance, not a warning, and anything the Weather Service has actually issued is on the live map.
The written summaries on this page are generated from the forecast data above, not by a meteorologist. Each sentence is a reading of the same numbers you can see, and no forecaster has reviewed them.
About the Sebastian forecast
Sebastian sits at 27.7872°N, 80.4800°W in Indian River County, Florida. The forecast above is drawn for that point from the National Weather Service's own computer models: a seven-day outlook, and a finer-grained one covering the next eighteen hours where it reaches, and the radar and alert panels show what the Weather Service has out over the area right now.
- County
- Indian River County
- Coordinates
- 27.7872°N, 80.4800°W
- Population
- 26,846 · 2023 estimate
- Land area
- 14.085 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Sebastian, and the forecast is for that location, not for every address inside the city limits, and a large city can have real weather differences from one side to the other.
How well can the network see Sebastian?
The nearest Doppler radar is KMLB (Melbourne, FL), 25 miles to the NNW. A WSR-88D's lowest routine scan sits half a degree above horizontal, and the earth curves away beneath it, so by the time that beam reaches Sebastian its center is about 1,500 ft above ground. That is about as close as radar coverage gets in the United States: the lowest scan is still near the ground when it reaches Sebastian, so low-level rotation and the leading edge of a gust front show up on it. Sebastian is closer to its radar than 78% of US cities.
The closest instrument actually measuring the air is KX26 · Sabastian Arpt on the ASOS/AWOS network, 2.1 miles away. Close enough that its readings are, for practical purposes, the conditions in town.
Beam height is the standard 4/3-earth approximation for the 0.5° scan and assumes normal refraction; it is where the center of the beam is, not its edges, and unusual temperature profiles bend it. Radar siting from the NWS WSR-88D network, station positions from the Florida observing network as of this build.
Forecasts near Sebastian
- Indian River Shores, FL8 mi
- Fellsmere, FL9 mi
- Vero Beach, FL11 mi
- Grant-Valkaria, FL11 mi
- Malabar, FL15 mi
- Palm Bay, FL16 mi
- Melbourne Beach, FL20 mi
- West Melbourne, FL21 mi
Elsewhere in Florida
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