San Diego/ Weather & Environment
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Published on May 21, 2024
San Diego Coastal Warm-Up Today Before Weekend Cool Down, NWS ReportsSource: Scott Cameron, CC BY 3.0, via Wikimedia Commons

Sun-seekers and beach-goers in San Diego can expect a warm-up today, with the mountains and inland valleys hitting temperatures 5 to 10 degrees higher than Monday, forecasters from the National Weather Service reported. Temperatures near the coast will hover in the 60s, while valleys will see mid to high 70s. In contrast, the scorched lower deserts are sizzling as highs climb into the upper 80s to mid-90s range.

The weather U-turn continues, with Wednesday predicted to be a tad toastier than Tuesday, even though the looming shadows of the Inland Empire shiver about 5 degrees below average highs—the chill across the coastal areas and valleys sticking below average. At the same time, the deserts bask a few degrees above the norm, according to the NWS forecast. The heat takes a brief dip Thursday, almost like the weather's taking a breather, with the Inland Empire feeling the most significant chill, yet still, deserts keeping up with average high temperatures; the coastal zone to the valleys will range in the 60s to mid-70s, and elevated areas from 4500 to 7000 feet will cool down to the upper 50s to mid 60s.

Shifting winds are to blame for the temperature rollercoaster, as "a trough of low pressure moving southward off the West Coast will move inland through southern California around Friday night," bringing stronger onshore flows and gustier winds, especially for mountainous areas and the deserts. Some gusts could hit the 40 to 50 mph mark, as stated in the Area Forecast Discussion.

The marine influence isn't just a fleeting visitor, as it's poised to thicken up to a cloudy blanket 4500 to 5000 feet deep by the weekend, which means more of San Diego could wake up to a gray sky Friday and Saturday. The sun may play coy before making its appearance. The temperatures will also dance to a cooler tune, 5 to 10 degrees below what folks on the ground are used to, according to the National Weather Service, but don't despair because looking past the weekend, there's light, or rather, warmth, at the end of this muggy tunnel with a high-pressure system bringing the mercury up again by Sunday continuing into mid next week.