CA pollen report
San Diego Pollen Report
San Diego's mild climate means plants pollinate on a long, forgiving schedule — good for gardens, rough for allergies. Grasses pollinate nearly year-round, eucalyptus and oak add heavy spring loads, and Santa Ana wind events push pollen and dust from the inland valleys straight across the metro. Ragweed and sagebrush carry the fall.
Collection coming soon to San Diego
PollyMap is actively recruiting a verified local partner in San Diego. Be the first to know — or apply to be the partner.
While we find a local clinic
Test the air at your own home in San Diego
No allergy clinic is reporting from San Diego yet. Until one does, you can order your own PollyKit — a simple air sampler you hang outdoors or indoors. Send it back and the PollyKit Lab shows you exactly what's floating in your air.
- Pollen from local trees, grasses and weeds
- Airborne mold spores
- Dust mites and other indoor allergens
Hang it outdoors
See which pollen and mold are in your yard this season.
Or hang it indoors
Check bedrooms and living spaces for mold, dust mites and more.
What drives allergies in San Diego
Grasses: nearly year-round (March – November)
Bermuda and other lawn grasses pollinate for most of the year in San Diego's climate — the metro's single longest allergen season.
Trees: eucalyptus, oak, and olive (February – June)
Coast live oak (Quercus agrifolia), eucalyptus, olive, and sycamore drive the spring season, with peaks in March and April.
Weeds: ragweed and sagebrush (August – November)
Ragweed (Ambrosia) and coastal sagebrush (Artemisia californica) dominate the fall, especially in canyons and open hillsides.
Santa Ana events: wind-driven spikes
During Santa Ana wind events, pollen and dust from inland valleys blow toward the coast, causing sudden spikes even outside peak season.
Pollen patterns in San Diego
In San Diego, tree pollen — including Oak, Olive, Cypress — typically dominates from late winter through spring. Bermuda grass is the most common warm-season pollinator, and Ragweed drives the largest fall pollen load.
Top trees
- Oak
- Olive
- Cypress
- Acacia
- Sycamore
Top grasses
- Bermuda
- Rye
- Fescue
Top weeds
- Ragweed
- Sagebrush
- Pigweed
Top molds
- Cladosporium
- Alternaria
- Penicillium
San Diego pollen calendar
Typical monthly intensity across the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| tree | ||||||||||||
| grass | ||||||||||||
| weed | ||||||||||||
| mold |
Historical reports
Cities near San Diego
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in San Diego today?
PollyMap publishes real, microscope-verified pollen counts for San Diego — measured from physical air samples. The latest report on this page shows current tree, grass, weed, and mold levels.
Is the pollen count high in San Diego right now?
San Diego's grass season runs most of the year, trees peak in spring, and Santa Ana winds can spike counts any time. The measured reports on this page show today's actual levels.
When is allergy season in San Diego?
Effectively year-round: trees February–June, grasses March–November, ragweed and sagebrush in fall, and wind-driven spikes during Santa Ana events.
Why do my allergies flare during Santa Ana winds?
Santa Ana events blow hot, dry air — carrying pollen and dust from inland areas — toward the coast. Sudden symptom spikes during these wind events are common across the metro.
Is pollen still bad in San Diego in the fall?
Yes, modestly. San Diego's mild coastal climate keeps grass pollen lingering and mold spores active after fall rains begin. There is no true off-season — something is pollinating nearly year-round.
Are you an allergy clinic in San Diego? Claim your territory on PollyMap.
PollyMap is a local authority-building tool for allergy clinics, ENT practices, and any clinic that offers allergy care. By becoming the Official PollyMap Partner for your part of San Diego, your clinic gets credited on real pollen reports, receives ready-to-share weekly content, and becomes the go-to local expert patients trust.
We assign each partner a designated territory within the San Diego metro — like a franchise territory. San Diego has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in San Diego yet. The best areas go to the first clinics that sign up — once one does, that part of town is off the table for everyone else.
San Diego's spread-out metro — North County, La Jolla, Chula Vista, El Cajon — has room for several PollyMap territories. The first allergy clinic in each becomes its credited pollen expert.
- Your clinic credited on every San Diego pollen report
- Weekly real-sample reports and ready-to-share content under your brand
- Locked territory — competing clinics can't claim your area
- Become the go-to allergy expert in your part of San Diego
Supported by PollyMap sponsors
Your business could be here
Reach local families checking real pollen conditions in their community.
Become a sponsorReport findings are based on reviewed sample data and are not influenced by sponsors.