San Diego Weather in April 2026

April lifts San Diego into a dry, bright rhythm as the wet season retreats. Highs reach 20.1C (68F) with lows of 12.5C (54F), rainfall drops to just 20mm across 3.4 days, and sunshine climbs to 11 hours daily. The marine layer still clouds mornings but breaks earlier, usually by 10am, and afternoons run reliably clear. Gray whale migration wraps up mid-month as the last calves pass northbound.

Neighborhoods show their microclimate personalities this month — Ocean Beach might sit at 18C and foggy while Convoy Street's Sichuan restaurants in Kearny Mesa serve lunch under 26C dry heat, twenty minutes apart. Balboa Park hosts EarthFair around Earth Day, drawing 60,000 people to the largest environmental fair in North America. La Jolla harbor seal pups take their first swims and jacaranda trees start their purple bloom along Sixth Avenue in Hillcrest. Padres regular-season crowds hit Petco Park, and Del Mar's polo season opens on weekends.

Ten-year data shows April warming faster than March — highs up nearly 0.9C since 2015 — while rainfall trends downward roughly 8mm per decade. The 2026 forecast points to a dry La Nina-neutral April with warmer-than-average Pacific water temperatures pushing offshore fog banks farther out. Ocean warms to 16C and surfers shed hoods but keep 4/3 wetsuits.

For 2026 travelers, mid-April lands after spring break Easter crowds clear and before Memorial Day pricing kicks in. Hotels in the Gaslamp and Mission Bay run 15-25% below June rates, and weekday flights into SAN drop noticeably after the second week of April 2026. Book Coronado Island properties two months ahead if targeting the last two weekends when San Diego Beer Week satellite events fill the ferry building.