Dr. Tara Mostofi
Allergy & Asthma Medical Group of the Bay Area
Brentwood, CA · California
Brentwood, CA Pollen Count Today
View today's allergy index, primary allergen, weather context, tree, grass, and weed pollen levels, plus the 5-day pollen forecast for Brentwood.
Today's pollen count in Brentwood
Today in Brentwood, California, the forecasted pollen level is very high with an allergy index of 5. The primary allergen is Grass. Use the forecast below to see whether conditions are likely to rise, ease, or stay steady over the next few days.
AllergyAva shows forecasted pollen levels and allergy risk estimates for Brentwood. Actual exposure can vary by neighborhood, weather, and time outdoors.
Pollen Level
Very High Risk5
Planning estimate (0–5)
Primary Allergen
Grass
Stay indoors when possible. Use HEPA filters and take prescribed medication.
84°
Temp
50%
Humidity
11
Wind mph
Pollen: AllergyAva seasonal estimate · Weather: AllergyAva estimated fallback
5-Day Pollen Forecast
Best day this week
Today - Very High
Worst day this week
Fri - Very High
Today
84°/53°
5
Very High
Tree4
Grass5
Weed2
Tomorrow
94°/63°
5
Very High
Tree3
Grass5
Weed2
Wed
78°/64°
5
Very High
Tree5
Grass3
Weed3
Thu
75°/58°
5
Very High
Tree1
Grass5
Weed1
Fri
68°/60°
5
Very High
Tree3
Grass5
Weed3
None
Very Low
Low
Moderate
High
Very High
Allergen Breakdown
Grass
Very High
Oak
High
Ragweed
Low
Mugwort
Very Low
Ava Personal Risk
Make this forecast personal
Get personalized exposure guidance based on your selected triggers, symptoms, sensitivity, and today's local conditions.
Your personal risk profile is stored on this device. Email is optional and only needed for alerts.
Weather-allergy synergy
Why conditions feel this way today
Brentwood's current very high reading is mainly tied to grass. Conditions look most manageable when wind is lighter and outdoor exposure is shorter.
- Temp
- 84°F
- Humidity
- 50%
- Wind
- 11 mph
- Rain chance
- 20%
24-hour allergy risk curve
Best outdoor window today in Brentwood
Better
Later evening or the calmest part of the day.
Avoid
Dry, breezy morning and midday periods.
Extra caution
Parks, fields, tree-lined streets, yard work, and long outdoor commutes.
Data Confidence & Sources
Pollen Forecast
- Source
- AllergyAva seasonal planning estimate
- Last Daily Update
Pollen models recalculate once daily
Weather Conditions
- Source
- AllergyAva estimated weather fallback
- Last Refresh
Weather data updates every 15–30 minutes
Local pollen exposure can vary by micro-vegetation, wind gusts, structural barriers, and time spent outdoors.
Check pollen in another city or ZIP code
Local allergy care
Allergists near Brentwood, CA
Use today's pollen forecast alongside nearby allergy and immunology profiles when symptoms need clinical follow-up, testing, or long-term treatment planning.
Dr. Valerie Jerdee
Allergy & Asthma Medical Group of the Bay Area
City allergy guide
Brentwood allergy profile
Today's risk+
Brentwood allergy conditions are shaped by local weather, seasonal vegetation, and short-term changes in wind, rain, humidity, and temperature. Tree pollen is usually more important in spring, grass pollen often builds from late spring into summer, and weed pollen can become more noticeable later in the year.
Use today's pollen index alongside the 5-day forecast to plan commutes, outdoor exercise, yard work, and window-open time in Brentwood. Conditions can still vary by neighborhood, nearby plants, and time spent outdoors.
Brentwood's guide sections below focus on recurring local exposure patterns. For today, treat the very high Grass reading as the live risk signal and use the weather card above for short-term wind, humidity, and rain context.
Seasonal guide+
Spring
Tree pollen
Often drives early-season symptoms
Late spring to summer
Grass pollen
Can rise around lawns, parks, and open areas
Late summer to fall
Ragweed/weed pollen
Major fall allergy trigger
Varies
Mold spores
Often affected by moisture and decaying leaves
Treatment and planning tips+
Track the forecast
Check Brentwood pollen levels daily during active allergy periods.
Reduce indoor exposure
Keep windows closed on high-pollen days and use HVAC or HEPA filtration when appropriate.
Plan medication timing
Follow your clinician's or product-label instructions, especially before your usual peak season.
Brentwood seasonal pollen calendar
Tree pollen
In season nowSpring
Often drives early-season symptoms
Grass pollen
In season nowLate spring to summer
Can rise around lawns, parks, and open areas
Ragweed/weed pollen
In season nowLate summer to fall
Major fall allergy trigger
Mold spores
Varies
Often affected by moisture and decaying leaves
Common pollen triggers around Brentwood
| Trigger | Typical season | What to know |
|---|---|---|
| Tree pollen | Spring | Often drives early-season symptoms |
| Grass pollen | Late spring to summer | Can rise around lawns, parks, and open areas |
| Ragweed/weed pollen | Late summer to fall | Major fall allergy trigger |
| Mold spores | Varies | Often affected by moisture and decaying leaves |
Frequently asked questions about pollen in Brentwood
What is the pollen count in Brentwood today?
Today in Brentwood, California, the pollen level is very high with an allergy index of 5. The main allergen to watch is Grass.
When is allergy season in Brentwood, California?
Allergy season in Brentwood, California can vary by allergen and weather conditions. Tree pollen often rises in spring, grass pollen becomes more active in late spring and summer, and weed pollen can remain elevated later in the year depending on local climate and vegetation.
How often should I check the pollen forecast in Brentwood?
If you have seasonal allergies in Brentwood, it is helpful to check the pollen forecast daily during peak allergy periods. Shifts in wind, rainfall, temperature, and humidity can all change local pollen exposure from one day to the next.
What pollen types affect people in Brentwood, California?
Brentwood residents may be affected by tree pollen, grass pollen, and weed pollen during different parts of the year. The strongest trigger depends on the season, nearby vegetation, and current weather conditions.