Bay Area/ San Jose

San Jose Heat Builds Through Monday As Fire Weather Threat Rises

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Published on July 30, 2026
San Jose Heat Builds Through Monday As Fire Weather Threat RisesSource: Adam Schultz, CC BY 2.0, via Wikimedia Commons

San Jose is starting today clear and near 61 degrees, but the easygoing morning is the opening act for a hotter stretch. The forecast calls for a sunny high near 85, with temperatures climbing to around 90 tomorrow and Saturday before reaching the low 90s next Sunday and Monday.

Sunny Stretch Turns Hotter

Today’s northwest winds will run 1 to 10 mph, with gusts up to 20 mph as afternoon heating kicks in. The National Weather Service expects interior areas to see Moderate HeatRisk as high pressure keeps building, while no rain is forecast through Wednesday.

Tomorrow and Saturday should reach about 90 degrees, followed by highs near 91 next Sunday and 93 next Monday. Overnight relief will be limited but still present, with lows ranging from roughly 58 degrees tonight to the low 60s early next week.

The extended warmup is a more sustained version of the South Bay heat Hoodline covered earlier this month in its earlier San Jose forecast. For people commuting, exercising or working outside, the hottest window will generally arrive from midday through the afternoon, when the sun and wind team up.

Dry Hills Need Extra Care

Nearby hills and inland ranges will face an elevated fire-weather threat as temperatures rise and humidity drops. Residents should avoid activities that could create sparks around dry grass and brush, particularly during the breezier afternoon and evening hours.

Santa Cruz Coast Comes With Its Own Warning

For anyone planning to escape the inland heat at the beach, the National Weather Service is warning of hazardous conditions through Saturday afternoon. Long-period swell may produce sneaker waves, strong rip currents and breaking waves up to 10 feet at some south- and southwest-facing beaches, including parts of Santa Cruz; beachgoers should stay near lifeguards and never turn their backs on the ocean.