Loma del Mar Weather
San Carlos, Sonora, Mexico
The weather in San Carlos is mostly sunny with a year around average 76º. Surface temperatures in the Sea of Cortez fluctuate by as much as 30 degrees F over the course of the year. The water is generally warmest -- as high as 90 degrees -- in August/September and coldest in late winter/early spring, generally bottoming out in the low 60s in February and March.