Port St. John, FL Pollen Count Today
Port St. John, FL · 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).
Port St. John, FL
Weeds Index
How active weeds pollen is today (0–100).
Port St. John, FL
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Port St. John Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Port St. John residents check each morning
The Port St. John pollen count today is 12 (Low). The main driver is Ragweed, with weed pollen at 13 today. Tree pollen is the highest single category in the split at 13 (Low), ahead of weed pollen at 13 and grass pollen at 5. Plant-by-plant detail for Port St. John, FL 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 tree pollen, reading noticeably higher than the rest, which is why the split is printed on every Port St. John page.
Florida’s mild climate supports a longer and less sharply divided pollen calendar than most of the United States: tree, grass and weed pollen can each appear across more of the year, and no single month reliably clears the index to zero. Florida pages should therefore be read from their modelled split rather than from a northern seasonal calendar. A low Florida total is a low modelled day, not an off-season guarantee, and the five-day outlook matters more here than in strongly seasonal climates.
To see whether today’s pollen level holds, check the 5-day Port St. John pollen forecast below — it is currently mixed, with Sunday the highest day in the window.
This is the pollen count Port St. John residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Port St. John pollen count today?
The Port St. John pollen count today is 12 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Port St. John: this page is updated every morning with the day’s modelled reading.
Port St. John allergies today
Port St. John allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 12 (Low), driven mainly by Ragweed. When people ask about Port St. John allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Port St. John.
Allergies in Port St. John follow the Florida 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 Port St. John 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 Port St. John allergy forecast: today reads 12 (Low), and the day-by-day outlook shows whether Port St. John 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 Port St. John today records is this same combined reading — tree, grass, weed and mold in one index.
The Port St. John allergy count today is 12 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Port St. John: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 12 | Low |
| Sunday, November 8 | 18 | Low |
| Monday, November 9 | 12 | Low |
| Tuesday, November 10 | 17 | Low |
| Wednesday, November 11 | 17 | Low |
Pollen Atlas forecasts Port St. John’s pollen count to peak on Sunday at 18 (Low) over the next 5 days.
Pollen by type in Port St. John
What is driving Port St. John’s pollen today
The shape of today’s 12 (Low) is set by tree pollen at 13 (Low on its own scale) — about 42% of the four category readings added together, level with weed pollen at 13. Tree readings are the fastest-moving of the four in their season, because species pollinate in sequence — a tree-led total can change character within a week. Tree pollen leading in November runs against the usual calendar — the Florida tree chapter runs January to April — 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 Port St. John, so the drivers have to be read from the category split above. The Florida guide’s account of Florida names oak, the signature spring event that often begins in February — 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 12 to 18, never changing band. Today’s 12 sits 3 points below the window’s average of 15.2 — a moving window, worth reading day by day rather than from the average.
Plants affecting Port St. John now
Detailed plant-by-plant readings for Port St. John 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 13 (Low).
Grass pollen is one of the categories with a non-zero reading today, at 5 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 13 (Low).
In the Florida pattern, the plants that typically shape this city’s year are trees, grasses and weeds spread across a long, mild season — 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.
Port St. John pollen through the year
Chapter by chapter, the Port St. John pollen year runs like this:
- Cedar and then oak open the year, oak beginning as early as February.
- Grasses run from spring into October or later.
- Ragweed arrives in late summer and fall, for a shorter window than in the Midwest, alongside a fall mold surge.
The Florida allergy season guide names oak, the signature spring event that often begins in February. Pollen Atlas data shows Miami recording measurable pollen in every month of a typical year — Florida’s calendar rarely clears to zero. Fall in Florida combines its shorter ragweed season with a mold surge from leaf litter and tropical-season rain.
November in Port St. John sits inside the weed chapter of the Florida year, in its closing weeks — the part of the calendar today’s readings should be judged against. Between them, the three chapters cover 11 months of the Florida year, January to November — a long season by national standards, with only a short quiet gap. The full calendar is set out in the Florida allergy season guide.
How to read this index
Pollen Atlas reports the Port St. John 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 Port St. John, FL 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.
Port St. John in today’s national picture
At 12 (Low), Port St. John ranks joint 76525th 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 Port St. John: Sharpes, FL (4 miles away) reads 13 (Low); North Merritt Island, FL (6 miles away) reads 13 (Low); West Canaveral Groves, FL (6 miles away) reads 13 (Low). Port St. John reads 1 point lower than its nearest tracked neighbour today. Across Florida’s 953 tracked cities, today runs from 12 in Vero Lake Estates to 30 in Harlem.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Port St. John resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every ragweed season, allergists in Port St. John, FL 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.
Port St. John in its local area
Port St. John is a census-designated place in Brevard County, Florida. Its population is 24,617 (ACS 2023).
Across Florida’s 953 tracked cities, Port St. John ranks joint 948th today.
Like every Pollen Atlas city page, the Port St. John, FL pollen count is refreshed each morning.
Nearby cities
- Sharpes pollen count (4 miles away)
- North Merritt Island pollen count (6 miles away)
- West Canaveral Groves pollen count (6 miles away)
- Titusville pollen count (7 miles away)
- Cocoa pollen count (7 miles away)
- Cocoa West pollen count (8 miles away)
From Pollen Atlas News
See how Port St. John ranks in today's pollen count rankings — the worst cities for allergies today
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).