San Francisco pollen forecast — Fisherman's Wharf neighborhood

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

On 10 August 2026, pollen conditions in San Francisco will be different from today, with ambrosia, artemisia continuing to decline

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

On 9 August 2026, Ambrosia is the dominant pollen source in San Francisco. artemisia and grass are also present but at lower levels. cypress are not currently active.

San Francisco Fisherman's Wharf features Monterey cypress, introduced ornamental trees, and coastal sage scrub as the main pollen sources along this exposed northern waterfront. The San Francisco Bay position means onshore Pacific winds frequently disperse pollen, while the coastal California climate advances the season and the Pacific marine layer can periodically suppress pollen dispersal throughout this iconic northern waterfront tourist district.

The San Francisco 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 Francisco, 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.