Long Beach, CA Pollen Levels Today

Long Beach sits along the Southern California coast, where a mild Mediterranean climate and year-round growing season create an extended, often overlapping allergy calendar rather than distinct on-off seasons.

Tree pollen typically drives the earliest and most intense wave, beginning as early as late January and peaking from February through April. Common local culprits include olive, oak, sycamore, mulberry, ash, pine, and the region's abundant ornamental elms and junipers.

As trees taper, grass pollen takes over from April through July, with Bermuda grass as the dominant trigger alongside ryegrass, fescue, and Johnson grass—Bermuda in particular can continue shedding pollen well into fall thanks to the warm coastal climate.

Weed season ramps up in late summer and persists through October, led by ragweed, sagebrush, pigweed, lamb's quarters, and Russian thistle blown in from inland areas.

The late-spring overlap between lingering tree pollen and emerging grasses, plus the late-summer overlap of grasses and weeds, often intensifies symptoms.

Non-pollen triggers are also significant: ocean humidity fuels outdoor mold spores, Santa Ana winds stir dust and particulates, and proximity to the ports and 710 freeway adds diesel pollution that worsens reactions.

Overall, Long Beach's allergy profile is mild but nearly year-round, with multi-allergen overlap as its defining feature.