Irvine pollen forecast - today, tomorrow and the week ahead

On 16 July 2026, overall pollen levels in Irvine are low. Cypress is the main contributor to airborne pollen, while grass and ambrosia remain at lower levels

On 17 July 2026, pollen conditions in Irvine will be different from today, with grass at low levels, ambrosia at low levels

According to the five-day outlook, artemisia, cypress, grass, and ambrosia pollen levels will increase later in the week.

On 16 July 2026, Cypress is the dominant pollen source in Irvine. grass and ambrosia are also present but at lower levels. artemisia, birch, oak, willow, and alder are not currently active.

Irvine's pollen season opens with acacia and introduced trees from January in the mild Southern California coastal climate. Oak and grass follow through March and April, with the season peaking earlier than most US cities. Onshore Pacific winds frequently disperse urban pollen, while surrounding Orange County chaparral and coastal sage scrub contribute seasonal grass and scrub pollen when offshore winds blow from the east.

The Irvine pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.

Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.

Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Irvine, modern forecasts combine recent measurements, weather data, and information about local vegetation.

This allows us to estimate pollen levels for today and the coming days, not just report the past.

Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.