St. Augustine pollen forecast — Castillo de San Marcos neighborhood

On 16 July 2026, overall pollen levels in St. Augustine are low. Grass is the main contributor to airborne pollen, while ambrosia remain at lower levels

On 17 July 2026, pollen conditions in St. Augustine will be similar to today, with grass at low levels, ambrosia at low levels

According to the five-day outlook, grass and ambrosia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.

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

At Castillo de San Marcos, a landmark in St. Augustine, the pollen season opens with oak and pine from January then cypress follows, running through February. Rather than one sharp peak, grass pollen stays elevated across most months, and mold levels also stay elevated for much of the year. Year-round warmth keeps some pollen and mold present in almost every month.

The St. Augustine 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 St. Augustine, 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.