If you step outside Tuesday morning bundle up – at least for now.
A low-pressure system moving inland to the north will keep temperatures cooler across San Diego County Tuesday, with gusty winds lingering in the mountains and deserts before things calm down midweek.
High temperatures Tuesday are expected to reach 69 near the coast, 69 to 72 inland, 71 to 76 in the western valleys, 64 to 72 in the mountains and 82 to 86 in the deserts, according to the National Weather Service.
A steady onshore flow will keep the marine layer in place. Low clouds and patchy fog are likely along the coast and in portions of the inland valleys during the night and morning hours before partial afternoon clearing, the NWS said.
We know you're wondering if it'll rain. Our sources say…maybe. The weather pattern at the end of the week is a bit tricky (where oh where will the upper low go?), so we'll have to keep an eye on things ? In the meantime, cooler and breezy this week ?️ pic.twitter.com/te0XRaQ0Eq
— NWS San Diego (@NWSSanDiego) March 2, 2026A short-lived warm-up inland is forecast Wednesday as a weak ridge of high pressure builds over Southern California. Highs in the inland valleys are expected to climb into the upper 70s, while coastal communities stay cooler under the lingering marine layer.
Just when it feels like things are settling down, another low-pressure system is forecast to swing inland Thursday, bringing another temperature dip and a fresh round of gusty west winds in the mountains and deserts.
A deeper marine layer could develop Thursday morning, with patchy drizzle possible west of the mountains.
Temperatures are expected to fall back to near-seasonal averages Thursday and Friday, with some mountain and high desert areas potentially dipping slightly below normal, meteorologists said.
Looking ahead to the weekend, forecast models are hinting at something interesting: an upper-level trough could deepen to the southwest, possibly forming a closed low near or just south of the county by Saturday. If that pans out, expect offshore flow to return, bringing northeast winds aloft and a warming trend.
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