San Jose rolled out of bed today to a chilly 48°F and a thick marine layer pooling in the low spots, the kind of gray start that makes coffee feel mandatory. That fog is expected to hang around until about 9 AM, then give way to a clear, sunny afternoon with a high near 73°F. West winds should stay light in the morning before ticking up to around 1–10 mph later in the day.
Foggy Mornings, Sunny Afternoons
Widespread fog is expected before 9 AM, especially in low-lying areas and along major freeway corridors. After that, the lid comes off and skies clear for bright, sun-filled afternoons with highs around 73°F.
If you are out the door early between 5–9 AM, plan for reduced visibility on US-101, I-280, and SR-85, where that marine layer likes to linger. According to the National Weather Service, the marine layer will keep immediate coastal areas cooler while inland valleys warm up faster once the sun breaks through.
Warm Inland, Cool Coast
Interior neighborhoods get the better end of the deal later this week. Highs are expected to climb into the upper 70s on Wednesday, with some inland spots nudging into the low 80s by Friday, while coastal areas stay stuck in the 60s.
Forecast discussions point to a building ridge inland that will keep interior areas warmer through Friday before a trough edges in and nudges temperatures down over the weekend. Inland winds could gust to 18 mph tomorrow, so it is a good idea to secure lighter outdoor items before they blow away.
Weekend Shift and Marine Advisory
By late Saturday and Sunday, expect clouds to creep back in, with drizzle possible along parts of the coast and a better shot at measurable rain late Sunday into next week.
Out on the water, mariners should pay attention to a National Weather Service Small Craft Advisory for waters from Point Arena to Point Reyes from 3 PM today to 3 PM tomorrow. Conditions in that window will be hazardous for small vessels, and inexperienced boaters are urged to stay in port and check the marine forecast before making any coastal plans.
What This Means For Your Commute
For this morning commutes, give yourself extra time, flip on the headlights in the fog and be ready for slower traffic in low-visibility pockets. By late morning, conditions should improve significantly.
Afternoons look made for errands, hikes and outdoor dining around San Jose, with comfortable temperatures once the sun is out. If you are heading to the coast, keep a light jacket handy, since that marine layer keeps things cooler even while inland areas warm up.
