Historical weather data, all-time temperature records, and monthly climate averages for Seal Beach, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Seal Beach typically feels like a mild early-spring day, with average highs around 71° and almost no chance of rain. But the date has some range in its history — temperatures have swung from a chilly 41° in 1955 all the way to a scorching 105° in 1989.
Seal Beach's all-time records tell the story of a coastal town that occasionally gets pushed to extremes. The thermometer has hit 111° (September 2010) and dipped to 25° (January 1963), though days like those are rare outliers in an otherwise mild climate. A single January storm in 1956 dropped 5.02 inches of rain in one day — more than most months ever see.
Seal Beach runs remarkably mild year-round, with monthly highs ranging only from 66° in January to 85° in early September — making it a pretty safe bet any time of year. If you're chasing warmth, late summer is your window; if you want to avoid rain, skip February, when weekly precipitation averages nearly three-quarters of an inch.