Santa Ana, CA Pollen Count Today
Santa Ana, CA · Updated Saturday, November 7, 2026
Pollen Overview
Today's overall pollen level and the dominant type (trees, weeds, grass, or mold).
Total Pollen Index
The combined pollen level across all types (0–100).
Santa Ana, CA
Weeds Index
How active weeds pollen is today (0–100).
Santa Ana, CA
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Santa Ana Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
This reading is the forecast point for Santa Ana — 2 nearby places use the same point; Santa Ana is 1.8 km from it.
Pollen count Santa Ana residents check each morning
The Santa Ana pollen count today is 33 (Low). The main driver is Ragweed, with weed pollen at 39 today. That total sits on a narrow base: weed pollen is 39 while tree pollen is just 21 and grass pollen 4. Plant-by-plant detail for Santa Ana, CA follows, along with the outlook for the days ahead. Pollen Atlas updated this count on Saturday, November 7, 2026.
A Low band on the Pollen Atlas index means the Total Pollen Index has stayed in the lower part of the 0–100 scale. Readings in this band are built from low individual category values rather than from one large spike, and the category split above matters more than the headline number: a low total can still contain one category, such as weed pollen or mold, reading noticeably higher than the rest, which is why the split is printed on every Santa Ana page.
Fall is ragweed season across most of the United States: ragweed plants release pollen from late summer into autumn, and weed pollen is typically the last major outdoor pollen category to fade as the weather cools. That pattern is why an autumn total is so often weed-led even when the headline number is low — tree and grass pollen have usually receded by then, leaving weed pollen, and on damp days mold, to make up most of what the index records.
To see whether today’s pollen level holds, check the 5-day Santa Ana pollen forecast below — it is currently holding, with Saturday the highest day in the window.
This is the pollen count Santa Ana residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Santa Ana pollen count today?
The Santa Ana pollen count today is 33 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Santa Ana: this page is updated every morning with the day’s modelled reading.
Santa Ana allergies today
Santa Ana allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 33 (Low), driven mainly by Ragweed. When people ask about Santa Ana allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Santa Ana.
Allergies in Santa Ana follow the California calendar set out below — the chapters, the plants behind them, and the 5-day forecast on this page show whether today is typical for the season or an exception to it. If you are checking allergies today in Santa Ana before heading outdoors, the split at the top of this page is the part to read: it shows which pollen is doing the work today, not just how high the total sits.
Read the five-day table on this page as the Santa Ana allergy forecast: today reads 33 (Low), and the day-by-day outlook shows whether Santa Ana allergies are set to ease or build across the week — the days to plan outdoor time around are the ones where the index steps down, not just today.
In practice, the allergy count Santa Ana today records is this same combined reading — tree, grass, weed and mold in one index.
The Santa Ana allergy count today is 33 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Santa Ana: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 33 | Low |
| Sunday, November 8 | 33 | Low |
| Monday, November 9 | 32 | Low |
| Tuesday, November 10 | 32 | Low |
| Wednesday, November 11 | 29 | Low |
Pollen Atlas forecasts Santa Ana’s pollen count to peak on Saturday at 33 (Low) over the next 5 days.
Pollen by type in Santa Ana
What is driving Santa Ana’s pollen today
The shape of today’s 33 (Low) is set by weed pollen at 39 (Low on its own scale) — about 61% of the four category readings added together, 18 points clear of the next category, tree pollen at 21. A weed-led total is the classic late-year shape: tree and grass pollen have usually receded, leaving weed pollen — and on damp days mold — to make up most of what the index records. Weed pollen leading in November runs against the usual calendar — the California weed chapter runs August to October — so today’s lead is the model outranking the pattern, and this page reports the modelled reading first.
Plant-level detail is not in today’s feed for Santa Ana, so the drivers have to be read from the category split above. The California guide’s account of California names planted olive and the Central Valley’s concentrated spring pollen — the pollens behind readings of this shape in this state — and the split shows how much of today’s total each category is actually carrying.
Across the five-day window the Total Pollen Index runs from 29 to 33, never changing band. Today’s 33 sits 1 point above the window’s average of 31.8 — a steady window, in which one day reads much like the next.
Plants affecting Santa Ana now
Detailed plant-by-plant readings for Santa Ana were not returned in today\u2019s source data, so this section summarises the pollen types the index above is built from instead of listing individual plants.
Tree pollen is one of the categories with a non-zero reading today, at 21 (Low).
Grass pollen is one of the categories with a non-zero reading today, at 4 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 39 (Low).
In the California pattern, the plants that typically shape this city’s year are winter and spring trees, late-spring grasses and late-summer weeds — named here as regional context only, not as today\u2019s measurements.
Plant detail returns here automatically on any day the source data includes it.
Every pollen type, with photos and seasons: the pollen directory.
Santa Ana pollen through the year
Chapter by chapter, the Santa Ana pollen year runs like this:
- Trees build through spring, with planted olive peaking from March into May.
- Grasses peak in spring in the Central Valley and run longer and milder on the coast.
- Weeds follow in late summer and fall, stronger after wet winters.
The California allergy season guide names planted olive and the Central Valley’s concentrated spring pollen. There is no single California season: the Central Valley records some of the state’s sharpest spring peaks, trapped and concentrated by valley geography, while the coast runs long and mild. The AAFA’s 2025 Allergy Capitals research noted upward movement for several California cities, attributed to grass and weed pollen after wet weather.
November falls between the main chapters of the California pollen year — the tail of one and the approach of the next — so the calendar alone explains little today, and the modelled split above carries the story. Between them, the three chapters cover 9 months of the California year, February to October — leaving a quiet gap of roughly 3 months in the depth of the off-season. The full calendar is set out in the California allergy season guide.
How to read this index
Pollen Atlas reports the Santa Ana pollen count on a Total Pollen Index from 0 to 100, built from separate tree, grass and weed readings. The total is a summary, not an average of the three: a single strong category can lift it, and three quiet categories can hold it down even in a month when Santa Ana, CA pollen is usually more active. Index values are a modelled pollen risk index computed by Pollen Atlas from open weather, vegetation and phenology data, calibrated against CDC/NAB season data, with plant detail by the Google Pollen API. The index is a modelled 0–100 scale, not a measured count, and figures update through the day, so a morning and an evening visit to this page can legitimately show different numbers.
Santa Ana in today’s national picture
At 33 (Low), Santa Ana ranks joint 9423rd of the 90896 cities Pollen Atlas tracks today — in the middle of the national table. The highest reading in the country today is Beja, Portugal at 52, and the lowest is Los Ángeles de San Rafael, Spain at 5. The whole table spans 47 points today — a wide-open day, when the top and bottom of the table are effectively in different seasons.
Around Santa Ana: Orange, CA (4 miles away) reads 33 (Low); Tustin, CA (4 miles away) reads 32 (Low); Fountain Valley, CA (4 miles away) reads 33 (Low). Santa Ana reads exactly level with its nearest tracked neighbour today. Across California’s 1602 tracked cities, today runs from 5 in Truckee to 42 in Mecca.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Santa Ana resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Santa Ana, CA can test whether tree, grass, weed or mold is the category that matters for you — the four readings at the top of this page are the starting point for that conversation.
Santa Ana in its local area
Santa Ana is a city in Orange County, California. Its population is 311,639 (ACS 2023).
Santa Ana anchors the forecast-point group of 2 places that share this reading. Within the group, Santa Ana ranks joint 1st; across California’s 1602 tracked cities, it ranks joint 40th today.
Like every Pollen Atlas city page, the Santa Ana, CA pollen count is refreshed each morning.
Nearby cities
- Orange pollen count (4 miles away)
- Tustin pollen count (4 miles away)
- Fountain Valley pollen count (4 miles away)
- Costa Mesa pollen count (5 miles away)
- Garden Grove pollen count (5 miles away)
- North Tustin pollen count (5 miles away)
From Pollen Atlas News
See how Santa Ana ranks in today's pollen count rankings — the worst cities for allergies today
See Santa Ana on the US pollen map
Pollen indexes: a modelled pollen risk index computed by Pollen Atlas from open weather, vegetation and phenology data, calibrated against CDC/NAB season data. Plant detail: Google Pollen API. Index values are modelled, not measured counts. Sources: CDC/NAB; USA-NPN; GBIF (CC BY); ESA WorldCover (CC BY 4.0).