
Sweet gum
Liquidambar styraciflua
Low today, mostly tree pollen.
Last updated July 20, 2026
Tree pollen is the more active category around San Diego today, though it remains at a low level overall, so most people should get through the day without much irritation. Grass pollen is barely registering, sitting at a very low level. Trees such as jacaranda, podocarpus, cupaniopsis, silver palm, and syzygium are the main local contributors, but current amounts are mild enough that only those with heightened sensitivity are likely to notice any effect. Looking ahead, conditions are expected to hold steady over the next few days, with grass pollen staying at a consistently very low level and no significant swings anticipated. This fits the seasonal pattern for midsummer in San Diego, where the spring tree pollen surge has largely faded and grass pollen tends to stay subdued through this stretch. Overall, allergy sufferers should find this a relatively calm period, with no major changes on the horizon.
Every dot is a tree near San Diego, colored by how allergenic it is. Click one for its details, and zoom in for a closer look.
The local tree genera behind today's pollen near San Diego. Each bar is that genus's share of the tree pollen.
1,020 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around San Diego: what each looks like, how allergenic it is, and when it blooms.

Sweet gum
Liquidambar styraciflua

Pine
Pinus

Ash
Fraxinus

California sycamore
Platanus racemosa

Italian cypress
Cupressus sempervirens

Purple leaf plum
Prunus cerasifera

Juniper
Juniperus chinensis

Chinese elm
Ulmus parvifolia

Evergreen pear
Pyrus kawakamii

Bradford pear
Pyrus calleryana

Fruit tree
Prunus persica

Siberian elm
Ulmus pumila

Olive fruitless
Olea

Holly oak
Quercus ilex

Canary island pine
Pinus canariensis

Coast live oak
Quercus agrifolia