The Forecast: Day-by-Day Tonight: Skies remain mostly clear inland. The coastal fog machine will stay confined mostly to the Monterey Bay region and parts of the SF Peninsula by Friday morning. Friday (The Peak Heat): Friday is the hot one. Inland valleys will easily soar back into the 80s and 90s. Only the furthest inlkand spots will hit a "Moderate Heat Risk," while beaches stay in the 60s thanks to a refreshing afternoon sea breeze. Beach Hazard Statement in effect Friday through Saturday 9 AM for sneaker waves and rip currents. The Weekend Shift: The cold front hits Saturday. Temperatures will plunge 5 to 10 degrees below seasonal averages for both Saturday and Sunday (but still a couple degrees above average inland!). Expect widespread morning fog, potential coastal drizzle, and gusty winds through our mountain passes. Early Next Week: The chill deepens Monday and Tuesday. A slight chance of actual light rain showers for the Bay Area northward.