NorCal Heat Timeline: When Will It Cool Down In The Bay Area?

BAY AREA, CA — Relief from the heat has finally arrived in the Golden State's weather forecast as much of the state has been under relentless swelter since last week, elevating the risk of wildfires and roasting inland communities.

In Northern California, extreme heat warnings and advisories will remain in effect Monday, but many will begin to expire Tuesday, according to the latest forecast from the National Weather Service.

"One more day of inland heat," forecasters wrote Monday.

Throughout Monday, "Moderate Heat Risk" will continue for portions of North, East and South Bay counties as well as inland Monterey and San Benito counties, the weather service said.

Then, a thick marine layer will begin to roll in on Tuesday, ushering in a gradual cooldown throughout the week.

"The pattern change begins on Tuesday, though be it, perhaps a bit more minimally than previously expected," the service said in its Monday forecast discussion. "The more substantial trough kicks in on Wednesday, which will pave the way for upper-level troughing to dominate the forecast through the weekend. Look for cloudy, drizzly, and foggy overnights and sunny skies for interior locations by the afternoon."

Meanwhile, smoke from the state's largest active wildfire, the Gifford, burning along the Central Coast, hampered wide swaths of Southern California last week. This week, smoke has begun to infiltrate the Bay Area but it wasn't expected to severley impact air quality.

"Southerly transport flow did allow for some upper level smoke from the Gifford Fire to sneak into the forecast area," forecastesr wrote Monday. "Thankfully, this is mainly high-level smoke. Latest smoke guidance shows a shift in transport flow, so will push some of the smoke southward again."

RELATED: 'No Sky July': The Bay Area Is Experiencing Its Coldest Summer In Decades

While temperatures stayed in the mid-60s and 70s along the coastal areas last week and over the weekend, inland communities soared into the 90s and even cracked 100 in some places, forecasters said last week.

In San Francisco, which remained largely unaffected by the heat wave, other than getting a few sunny days, will actually see a slight but gradual increase in temperature, with Monday peaking at 69 degrees with potential to reach 72 degrees by Friday, according to the NWS.

Interior communities like San Ramon experienced near triple-digit temperatures over the weekend, but the highest temp expected for Monday in the East Bay city will be 85 degrees. Throughout the week, temperatures will gradually cool to hover around 80 degrees, according to the NWS.

Over in the South Bay, afternoon sunshine with highs pushing to the low 80s is expected in cities like Palo Alto, Milpitas and Mountain View throughout the week.

Even as heat warnings and advisories expire on Tuesday, much of the Bay Area has remained spared from the worst of the heat bearing down on California.

During the heat wave, many of the coastal Bay Area cities, like San Francisco, only experienced a slight warmup from the weeklong heat wave, offering a brief reprieve from an unusually chilly summer.

While the city by the bay did get a brief break from grey skies, coastal drizzle, and breezy, chilly conditions are expected to return to San Francisco by Monday night.

The National Weather Service's Bay Area office dubbed last month "No Sky July," as the service recorded its coldest start to the summer since 1965 at the San Francisco International Airport.

In downtown San Francisco last month, the weather service measured the city's coldest half of a summer since 1982. Meanwhile, across the Bay Bridge, Oakland is experiencing its coldest summer since 1970 — the coldest on record for the city.

“It’s not record-breaking — but at this point, we’re looking anywhere from 20 to 30 years since we’ve had this cold of a summer," Matt Mehle, a meteorologist at the National Weather Service, told the Times.