Pollen Count San Diego — What You Need to Know
The pollen count in San Diego peaks in February–May. California's Mediterranean climate produces a long pollen season from February through June.
Why Is Pollen High in San Diego?
The primary allergen is Grass — grass pollen affects more Americans than any other allergen — over 40 million people are sensitive to it. Pollen spikes on warm, dry, and windy days. Rain temporarily clears the air, but counts rebound fast.
Pollen Season in San Diego
- Tree pollen — starts in late winter, peaks April–May. Birch, oak, and cedar are the biggest triggers.
- Grass pollen — peaks spring. Affects over 40 million Americans.
Frequently Asked Questions
What is the pollen count in San Diego today?
The current pollen count in San Diego is updated every 12 hours using live data. Levels are rated Low, Moderate, High, or Very High based on pollen concentration in the air. Select the live badge above for today's reading.
What type of pollen is high in San Diego right now?
The primary allergen in San Diego is Grass. Peak pollen season in San Diego runs from February–May. The 'Active Allergens' section above shows which specific pollens are currently elevated.
When is pollen season in San Diego?
Pollen season in San Diego typically peaks in February–May. Tree pollen starts in late winter, followed by grass pollen in late spring through summer, with minimal ragweed impact in this region.
What should I do when pollen is high in San Diego?
On high pollen days in San Diego: check the forecast before going outside, schedule outdoor activities for the afternoon (pollen peaks 5–10 AM), keep windows closed and use AC, take antihistamines before exposure rather than after symptoms start, and shower after spending time outdoors to remove pollen from skin and hair.
How accurate is the pollen forecast for San Diego?
The pollen forecast for San Diego is based on the Google Pollen API, which combines real-time sensor data, weather forecasts, and plant biology models. Forecasts are updated every 12 hours and are generally accurate within 1 level (e.g., Moderate vs. High). Actual counts can vary by neighborhood depending on local vegetation.