San Diego pollen forecast — Ocean Beach neighborhood

On 9 August 2026, overall pollen levels in San Diego are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia, cypress, and grass remain at lower levels

On 10 August 2026, pollen conditions in San Diego will be similar to today, with cypress at low levels, grass at low levels, ambrosia at medium levels, artemisia at medium levels

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

On 9 August 2026, Ambrosia is the dominant pollen source in San Diego. artemisia, cypress, and grass are also present but at lower levels.

Ocean Beach sees the same pollen timeline as the rest of San Diego, beginning with olive and acacia in January then eucalyptus builds through February. Grass pollen rises through March and April, and sagebrush and mugwort extend exposure into early autumn. Mild year-round temperatures push the pollen calendar earlier than in most of the country, a pattern felt across this part of San Diego.

The San Diego 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 San Diego, 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.