Tree Pollen Count in Harwich Center, MA — Today

Updated Saturday, November 7, 2026

Pollen by type in Harwich Center

What is the tree pollen count in Harwich Center today?

The Harwich Center tree pollen index today is 0.6 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Harwich Center’s overall pollen count today is 6 (Low) across all types. See the full Harwich Center pollen count for the overall index and every type together.

Harwich Center Tree Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 76Low
Sunday, November 815Low
Monday, November 915Low
Tuesday, November 1015Low
Wednesday, November 1115Low

Pollen Atlas models the daily detail as an overall index: day-by-day splits by individual pollen type are not part of the modelled data, so this table shows Harwich Center’s overall trend across the week. Today’s tree pollen reading is the headline above.

Species driving Harwich Center’s tree pollen

Species-level counts are not part of the modelled data Pollen Atlas publishes — the modelled index is reported per pollen type, not per species — so this section gives the type summary: tree pollen reads 0.6 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.

Plants affecting Harwich Center now — tree pollen

Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Harwich Center. The type summary stands: tree pollen reads 0.6 (Low) today.

In the Northeast pattern, the plants that typically shape this city’s year are spring trees, late-spring grasses and late-summer ragweed — named here as regional context only, not as today’s readings.

Plant detail returns here automatically on any day the feed includes it.

What this tree pollen level means

Low risk. Keep windows open; consider allergy meds only if sensitive.

Enjoy outdoor activities.

Trees open in late March and build to an oak-led peak in May. This month sits outside the usual tree pollen window for the Northeast pattern, so today’s tree pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The Massachusetts allergy season guide singles out birch, opening the spring in April, and oak carrying the peak through May.

Harwich Center allergies today

Harwich Center allergies today are set by the same reading as the Harwich Center pollen count today: the Total Pollen Index is 6 (Low), and the tree pollen index on this page is 0.6 (Low) of it. When people ask about Harwich Center allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Harwich Center.

Allergies in Harwich Center follow the Massachusetts calendar set out on the full Harwich Center page — the chapters, the plants behind them, and the 5-day forecast show whether today is typical for the season or an exception to it. If you are checking allergies today in Harwich Center before heading outdoors, the tree pollen split on this page is the part to read: it shows whether this pollen type is doing the work today, not just how high the total sits.

Read the five-day overall trend above as the Harwich Center allergy forecast for the tree pollen season: it shows whether Harwich Center allergies are set to ease or build across the week, day by day — the days to plan outdoor time around are the ones where the overall index steps down, not just today.

See the full Harwich Center pollen count — all types, the overall index and today’s ranking context

Harwich Center grass pollen count

Harwich Center ragweed pollen count

See how Harwich Center ranks in today's pollen count rankings — the worst cities for allergies today

See Harwich Center on the pollen map

Every pollen type, with photos and seasons: the pollen directory

Massachusetts allergy season guide

Tree pollen season

Find an allergist in Harwich Center, MA

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).