Pollen today
Loading today’s values…
Pollen today
Loading today’s values…
Google gave no index for tree, grass or weed pollen here today.
Next four days, highest level each day:
Source: Includes pollen data from GoogleGoogle Maps
Source: Includes pollen data from GoogleIncludes data from Google Maps
Google’s index for each plant it models in San Diego today. A plant out of season has no index.
Source: Includes pollen data from GoogleGoogle Maps
The forecast that moves pollen around, and the air beside it.
Forecast: National Weather Service, updated 11:16 am PT.
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Each thread is one kind of pollen, and each square is one week, colored by that week’s highest level.
Records for San Diego began on October 14, 2026. Each week adds a square.
Highest level each week, November 2025 to November 2026, from each day’s forecast.
| Week | Tree | Grass | Weed |
|---|---|---|---|
| Oct 15 to Oct 21 | Not recorded | Not recorded | 1 Very low |
| Oct 8 to Oct 14 | Not recorded | Not recorded | 1 Very low |
Source: Includes pollen data from GoogleIncludes data from Google Maps
What this forecast doesn’t measure, and when to get help.
Google’s index covers tree, grass and weed pollen only, so there is no mold level for San Diego on this page. The National Allergy Bureau publishes pollen and mold counts measured at its stations. Our guides cover common molds such as Alternaria, Cladosporium and Aspergillus.
The forecast doesn’t cover allergens indoors either: dust mites, cockroaches, mice, cats and dogs. Our guides explain each one, starting with dust mites and cats.
An estimated 8.9% of adults in the city of San Diego have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 8.0% to 10.0%). It is a statistical estimate from national survey data, not a count.
49 allergists enrolled in Medicare practice in the San Diego area: 1.49 for every 100,000 people, more than the 1.22 across the US. The count doesn’t show how soon you can get an appointment. See the doctors listed in the San Diego area, or how every state and metro compares.
AllergyNest count from CMS’s Doctors and Clinicians file (October 2026) and Census population estimates for 2025.
The geography, climate and plants behind each season here, with a source for every fact.
Low clouds form regularly over San Diego and often spread inland over the coastal valleys and foothills.2 The Pacific Ocean tempers the prevailing winds and weather.2 Summers at Lindbergh Field average about 70 °F, and a typical year brings no freeze.1 About 85 percent of the rain falls from November through March.2
California sagebrush, the most important and widely distributed plant of coastal sage scrub, falls into two groups in the county: the Diegan along the coast and the Riversidian inland.3 The shrub is wind pollinated.3 The National Park Service lists it as native and abundant at Cabrillo National Monument.4
Coast live oak grows from sea level to 5,000 feet in southern California, and hybrids between one of its varieties and California black oak occur in San Diego County.5 It is wind pollinated, and its catkins emerge in March and April.5 Bermuda grass blooms from June through September and grows throughout California below about 2,900 feet, except in the Great Basin.6
Answered from the values on this page.
Very little. None of the plants Google models is above 0 in San Diego today.
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central San Diego. A pollen count is the number of pollen grains measured in a cubic meter of air at a counting station. How our pollen index works.
Twice a day. We fetch new values soon after midnight in San Diego, so each day starts with its own values, and again after Google’s daily model run, usually by about 7:30 am PT. Each section shows when its values were retrieved.
Since October 14, 2026. The year in pollen above fills in as each day is recorded, and weeks before then show no data. Google doesn’t provide past values, so nothing earlier can be added.
Source: Includes pollen data from GoogleIncludes data from Google Maps