San Diego starts Tuesday clear and mild, but temperatures will climb quickly under full sunshine, reaching about 96 degrees by afternoon.
Heat Warning Through Thursday
The National Weather Service San Diego has an Extreme Heat Warning in effect for coastal San Diego County until 8 p.m. Thursday. Highs near the beaches are expected to reach the mid-80s to lower 90s, while mesas and higher coastal terrain could climb into the mid-90s or near 100.
A returning marine layer will bring coastal fog Wednesday and Thursday. Nights will stay unusually warm, with lows in the upper 60s to low 70s, so residents without reliable cooling should plan ahead and check on neighbors who may be vulnerable to heat.
Beach Hazards Arrive Tuesday Afternoon
A Beach Hazards Statement begins Tuesday afternoon and continues through Friday evening. Surf of 3 to 5 feet, with sets reaching 6 feet on south- and southwest-facing beaches, is expected to produce dangerous rip currents.
A Coastal Flood Advisory starts Wednesday morning and runs through late Friday morning, with minor flooding possible in low-lying coastal parks, lots and roads. Beachgoers should swim near a lifeguard, and drivers should avoid flooded coastal stretches rather than testing whether a roadway looks passable.
Cooler Weather And Shower Chances Next Week
The heat finally eases Friday and Saturday. Patchy fog may return overnight and during the morning, but afternoons should stay mostly sunny.
Sunday brings a sharper cooldown, with regional highs in the mid-70s to lower 80s and a 30% to 40% chance of at least 0.10 inch of precipitation. Showers remain possible Monday, when the high is expected to reach about 75, as a low-pressure system draws more moisture toward Southern California.
