Very Low Pollen in Costa Mesa, CA

Very low today, mostly weed pollen.

Last updated August 15, 2026

Today's index1out of 5Very Low
TreeNone
WeedVery Lowoff-season

Driving it today

TristaniopsisTristaniopsisWashingtoniaWashingtoniaPhoenixPhoenixTrachycarpusTrachycarpusSyagrusSyagrus

Forecast

Sun
1
Mon
1
Tue
1
Wed
1

About pollen in Costa Mesa

Pollen levels around Costa Mesa are quiet today. Weed pollen is present but only at a very low level, while tree pollen is absent altogether. For most people, this means little to no irritation, and even those with sensitivities should notice minimal impact outdoors. Looking ahead, weed pollen is expected to hold steady at this same low level through the next several days, so no significant change is on the way. Tree pollen typically peaks in spring for local species like Tristaniopsis, Washingtonia, and Phoenix palms, and with summer underway, those trees are largely dormant in terms of pollen output. As late summer approaches, weed pollen may gradually become more relevant, but for now conditions remain calm and easy to manage.

What to do today

  • Pollen levels are very low right now. It's a great day to enjoy the outdoors!

Tree map

Every dot is a tree near Costa Mesa, colored by how allergenic it is. Click one for its details, and zoom in for a closer look.

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Top tree-pollen sources

The local tree genera behind today's pollen near Costa Mesa. Each bar is that genus's share of the tree pollen.

45 pollen-relevant trees nearby drive today's tree-pollen reading.

Meet the trees near you

Get to know the tree types growing around Costa Mesa: what each looks like, how allergenic it is, and when it blooms.

Canary island pine

Canary island pine

Pinus canariensis

Allergenicity 1/4Blooms spring
Evergreen pear

Evergreen pear

Pyrus kawakamii

Allergenicity 1/4Blooms spring
Ornamental pear

Ornamental pear

Pyrus calleryana

Allergenicity 1/4Blooms spring
London plane

London plane

Platanus acerifolia

Allergenicity 4/4Blooms spring
Arizona ash

Arizona ash

Fraxinus velutina

Allergenicity 4/4Blooms spring
American sweetgum

American sweetgum

Liquidambar styraciflua

Allergenicity 2/4Blooms spring
Leaf plum purple

Leaf plum purple

Prunus cerasifera

Allergenicity 1/4Blooms spring
Peach

Peach

Prunus persica

Allergenicity 1/4Blooms spring
Italian stone pine

Italian stone pine

Pinus pinea

Allergenicity 1/4Blooms spring
Japanese black pine

Japanese black pine

Pinus thunbergii

Allergenicity 1/4Blooms spring
Chinese elm

Chinese elm

Ulmus parvifolia

Allergenicity 3/4Blooms spring
Olive

Olive

Olea europaea

Allergenicity 5/4Blooms spring,summer
Silver maple

Silver maple

Acer saccharinum

Allergenicity 3/4Blooms spring
Chinese juniper

Chinese juniper

Juniperus chinensis

Allergenicity 5/4Blooms winter,spring
Italian cypress

Italian cypress

Cupressus sempervirens

Allergenicity 4/4Blooms winter,spring
Shamel ash

Shamel ash

Fraxinus uhdei

Allergenicity 4/4Blooms spring

Common questions

What is the pollen count in Costa Mesa, CA today?
Costa Mesa, CA is at a very low 1 out of 5 on the Universal Pollen Index today, driven mainly by weed pollen. The five-day outlook holds steady around 1 of 5.
Is weed pollen high in Costa Mesa, CA right now?
Weed pollen is very low today at 1 of 5, and it's past its peak season. Most people won't notice it.
What plants are causing allergies in Costa Mesa, CA?
The main sources right now are Tristaniopsis, Washingtonia, Phoenix, Trachycarpus, and Syagrus.