Last week, an upper-level low-pressure system generated significant atmospheric instability across the Central Coast, fueling intense convective rain showers and thunderstorms. This system, characterized by unusually cold air aloft meeting warm, moist air at the Earth's surface, moved exceptionally slowly, leading to substantial rainfall totals, particularly in coastal areas. Santa Barbara received 1.01 inches of precipitation from this event.
Coastal regions experienced some of the highest rainfall, with weather stations in Morro Bay and Los Osos recording between 3.5 and 4.0 inches within a 24-hour period. A weather station in Baywood Park notably registered an instantaneous rainfall rate of 6 inches per hour around 5 a.m. Thursday, illustrating the intensity of some convective downpours, even if brief. Other parts of the Central Coast saw varying amounts: San Luis Obispo County Airport recorded 1.14 inches, Paso Robles Airport measured 0.72 inches, and Santa Maria Airport reported 1.36 inches.
This remarkable storm pushed October precipitation totals above average for much of the Central Coast, despite the rainfall season beginning on July 1. Looking ahead, another round of unsettled and potentially stormy weather is forecast to develop around the end of October and into early November. While forecast confidence remains limited regarding the precise timing, intensity, and potential rainfall amounts for this upcoming system, numerical weather models show increasing agreement that another storm could bring southerly winds and precipitation to the Central Coast. This increasing agreement suggests a higher possibility of additional rainfall as the region transitions from October into November. Given the significant rainfall from last week's storm and the potential for more precipitation, the Central Coast could be off to a notably wet start to the 2026–2027 rainfall season.
For the current week, a relatively stable weather pattern is expected to persist through Friday. Moderate to fresh northwesterly winds, ranging from 13 to 24 mph, developed Monday afternoon and diminished overnight. These afternoon northwesterly winds are projected to strengthen to fresh to strong levels, between 19 and 31 mph, from Tuesday through Friday, typically easing during the nighttime and morning hours. This recurring onshore wind pattern will facilitate the spread of low marine stratus clouds inland overnight, resulting in areas of fog and mist during the early morning. The marine layer is generally expected to clear by late morning, giving way to partly cloudy to mostly sunny skies each afternoon. Daytime high temperatures throughout the week will range from the upper 60s to lower 70s, with overnight lows dropping into the upper 40s.
Looking towards the upcoming weekend, moderate to fresh Santa Lucia (northeasterly) winds, between 13 and 24 mph, are forecast to develop Saturday morning. Another period of offshore winds is anticipated from Saturday night into Sunday morning. These offshore wind conditions are expected to bring mostly clear skies and warmer temperatures across much of the Central Coast, including beach areas, with daytime highs reaching the low to mid-70s.
Ocean conditions will also see changes. A 5- to 7-foot northwesterly deep-water swell, with an 8- to 11-second period, is forecast for Saturday, decreasing to 3- to 5-feet with an 8- to 10-second period on Sunday into Monday. Increasing northwesterly winds along the central California coastline will generate a 4- to 6-foot northwester deep-water sea and swell, with a 5- to 14-second period, on Tuesday, which is expected to maintain this height and period through Friday. Additionally, increasing southerly winds will produce increasing southerly seas later Saturday (Halloween) into next Monday, November 2. A 1- to 2-foot Southern Hemisphere deep-water swell, with a 16- to 18-second period, is forecast to arrive along the coastline on Tuesday, building to 2- to 3-feet with a 14- to 16-second period on Wednesday and remaining at this level through Saturday. Seawater temperatures are expected to range between 65 and 68 degrees through next Sunday.
