San Diegans can expect a spell of warm and dry conditions, with high temperatures hovering 5 to 15 degrees above normal through Tuesday according to the National Weather Service San Diego; the coastal areas might see the return of fog as early as tonight, but there's still uncertainty around that prediction, the NWS Forecast Office for San Diego noted offshore winds are expected to kick up, reaching 30-40 mph particularly near foothills and mountain passes later today into Tuesday, with these breezes waning into Tuesday night.
In a more definitive shift toward the end of the week, the NWS indicates a cool down is on the way, "Low pressure will bring much cooler weather starting Thursday," the National Weather Service San Diego page details for those at lower elevations can expect highs in the mid to upper 60s, cooler climes also descend onto the mountains and high deserts with 50s and 60s in the forecast, while the low desert will experience 70s and patchy dense marine fog could make an appearance affecting visibility on the water tonight into Tuesday with probabilities ranging from 35-45%, which is of particular interest to mariners navigating the area around this time.
While chances for precipitation from Friday into Saturday are modest, hovering at 10-15%, the looming Pacific low pressure system might still grace the area with some light rainfall, "mostly for the mountains westward to the coast," as conveyed by the Area Forecast Discussion of the National Weather Service San Diego CA, and despite the brief warmth, San Diegans should prepare for an imminent cooling trend that begins in earnest on Wednesday and persists through Friday.
Come the weekend, conditions will once again shift as high pressure starts to rebuild, leading to a return of fairer weather and climbing temperatures, by next Monday temperatures could surge, being "as much as 8 degrees above normal for areas west of the mountains" according to the forecast discussion, this temperature rebound will likely be a brief interlude with patchy fog also predicted to linger into the early hours on various days throughout the week, nighttime and early morning travelers should take note of potential visibility concerns, especially along the coast where fog is more prevalent as detailed in the 7 Day Forecast for San Diego.
