, Issued at 1122 AM PDT Fri Sep 4 2026 (Friday through Monday)
The primary concern over the Labor Day holiday weekend is hazardous conditions at Pacific Coast beaches Friday through Monday. Two sets of long period southerly swell from distant Hurricane Karina and Hurricane Marie will result in an increased risk for sneaker waves and strong rip currents with breaking waves up to 10 feet. Remaining out of the water will not be enough, you will need to stay off of beaches, jetties, and rocks to avoid being swept into the ocean by a sneaker wave. Blue sky days are the most deadly at area beaches, don't further the narrative. Minor coastal flooding is expected during high tide for bayshore locations along the San Pablo Bay Friday afternoon/evening. Impacts can be expected primarily in bayside Marin County. Sensible weather wise, anomalously deep upper- level troughing will maintain below normal temperatures and onshore flow through Sunday. The marine layer will likely be extremely nuanced, especially today into tomorrow, as it has to form from scratch after being mixed out by the front. Generally speaking, it should be on the deeper side with the associated lift. In the interim, ample low-level moisture and clear skies will make patchy fog possible in the mornings. Gradual warming and drying trend kicks off Monday as the low begins to fill and move east.
..issued at 1122 AM PDT Fri Sep 4 2026 (Tuesday through Thursday)
Upper-level ridging will nose in from the east on Tuesday, likely bringing the warmest day of the week with temperatures rebounding to near normal. A reinforcing trough is expected to dig well off the West Coast and pickup what will likely be Tropical Depression Marie Tuesday into Wednesday. This will turn the upper-level pattern into a conveyor belt of moisture with cyclonic flow to the west and anti- cyclonic flow to the east. As we are dealing with two moving targets, the low and Marie, uncertainty is relatively high. It's important to note that Marie will not be making landfall in California, let alone will it be tropical by the time it gets here. We are simply going to get remnant moisture from it. The official forecast has widespread rainfall up to 0.25" with locally higher amounts up to 0.50" in the higher terrain. Right now, this looks like a beneficial event with limited instability.
(18z TAFS) Issued at 1045 AM PDT Fri Sep 4 2026
VFR is expected to persist through the remainder of today and tonight for a majority of the terminals. Monterey Bay sites may see a return of MVFR/IFR ceilings in the hours after midnight but confidence is low in the extent and timing of stratus redevelopment while the marine layer attempts to reorganize this weekend in the wake of the weak cold front passing east today.
Vicinity of SFO, VFR is expected to prevail with breezy diurnal onshore flow that will ease after sunset. There is a chance of MVFR ceilings around sunrise, more likely at KOAK if they develop, otherwise VFR.
SFO Bridge Approach, Similar to SFO.
Monterey Bay Terminals, VFR through the remainder of today and tonight with low confidence in timing and extent of MVFR/IFR ceiling development after midnight into the early pre-dawn hours Saturday.
(today through Wednesday) Issued at 1045 AM PDT Fri Sep 4 2026
Gentle to moderate west/northwest breezes will persist through the weekend into next week, when they become more widespread. Occasionally strong gusts are possible across the San Pablo, San Francisco Bay and Monterey Bays. Tropical activity will continue to produce long period southerly swell through the weekend into the beginning of next week.
Issued at 1010 PM PDT Wed Sep 2 2026
A Beach Hazards Statement is in effect Friday-Monday as the swell from both Hurricane Marie and Hurricane Karina reaches the coast. As these hurricane whip up the ocean, the waves travel over 1,000 miles in all directions, gradually flattening out to low amplitude, but long period swell. These waves aren't very intimidating if you're on a boat in the open ocean, but the long period allows them to push much farther up the beach. Long period swell always increases the chance for sneaker waves, but that's particularly true this weekend since there are 2 different sets of southerly swell, and their energy will periodically combine. In addition to sneaker waves, expect strong rip currents and breaking waves up to 10 ft. As this is a holiday weekend and the weather is otherwise pretty nice, the exposure to the risk is high. Avoid the water if you're not an expert swimmer. If caught in a rip current, swim parallel to shore until you stop feeling the pull. Even on the beach, be prepared for sneaker waves this weekend and never turn your back on the ocean.
Ca, Beach Hazards Statement through Monday evening for CAZ006-505- 509-529-530.
Coastal Flood Advisory from 4 PM this afternoon to 9 PM PDT this evening for CAZ506.
PZ, Small Craft Advisory from 3 PM this afternoon to 9 PM PDT this evening for Mry Bay.
