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Early-Season March Heat Wave Grips Central Coast
Temperatures could reach the mid-90s to near 100°F inland, with coastal areas warming into the upper 80s and lower 90s.
Mar. 16, 2026 at 11:33pm
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A remarkable early-season heat event is unfolding across San Luis Obispo County and Santa Barbara County, with temperatures climbing far above normal all week. The heat will peak Wednesday through Friday, challenging both daily and all-time March temperature records across the region. Residents are advised to take precautions, stay hydrated, limit outdoor activity, and check on vulnerable neighbors and pets.
Why it matters
This extreme heat event in March is highly unusual for the Central Coast, which typically experiences more moderate temperatures this time of year. The prolonged high temperatures pose risks to public health and safety, especially for vulnerable populations.
The details
An exceptionally strong high-pressure ridge, rare for March, is the cause of this extreme heat. Inland areas could reach the mid-90s to near 100°F, while even coastal communities will warm into the upper 80s and lower 90s. Overnight temperatures will remain unusually mild, offering little relief and increasing the overall heat risk.
- The heat will build through midweek and peak Wednesday through Friday.
- A Heat Advisory is in effect until 8 pm on Friday.
- An Extreme Heat Warning is in effect from 10 am Tuesday until 8 pm Friday.
The players
Jim Castillo
A meteorologist reporting on the heat event for ksby.com.
What they’re saying
“Stay cool and hydrated, Central Coast!”
— Jim Castillo, Meteorologist
What’s next
Relief is expected this weekend as temperatures gradually ease, returning closer to seasonal levels by Sunday.
The takeaway
This early-season heat wave is a stark reminder of the impacts of climate change, and the importance of being prepared for extreme weather events, even in traditionally mild coastal regions like the Central Coast.
