Seattle Mushroom Calendar
Seattle sits in the Puget Lowland and a moderately damp climate, with roughly 36.5 inches of annual rainfall, most of it falling in the cool months from fall into spring. The ground warms and reaches early fruiting potential around March, by which point the average last frost (Mar 13) has usually passed. Summer fruitings stay confined to pockets of moisture — irrigated urban ground can be one — and the real abundance arrives with the fall rains in September. The first frosts around Nov 17 eventually close the main season, though hardy cool-season species hang on.
Best months
April, October, and November
Ground warms
~March
Frost-free
Mar 13 – Nov 17
Annual rain
36.5"
Driest
July and August
Species tracked
11
What Fruits When Near Seattle
JFMAMJJASONDMorelKing BoleteMatsutakeChanterelleHedgehogOysterLobsterBear's HeadBlewitThe PrinceShaggy Mane
Shading shows when each species typically fruits within about 10 miles, not abundance. Based on iNaturalist observation trends.
The Shape of the Season
All species combined — local observations within about 10 miles, by month.
Weather Through the Year
Average daily high–low (°F)
Average monthly precipitation (inches)
The Forest Around Seattle
Dominant tree species within about 10 km — the hosts that shape which mushrooms grow here.
- Red Alder45.5%
- Bigleaf Maple41.8%
- Douglas-fir12.7%
Track the Season as It Happens
This calendar shows typical timing. A free Salish Mushrooms account adds live environmental layers — soil moisture, soil temperature, snow cover, and recent precipitation — on the Forayz map.
Species to Know Near Seattle
Common Questions
When is mushroom season in Seattle?
Near Seattle, most mushroom activity arrives with the fall rains. The strongest months in the local observation record are April, October, and November.
When do morels fruit near Seattle?
Morel reports near Seattle peak in April. Timing tracks soil temperature, so south-facing slopes and lower elevations start earlier and higher ground runs later.
What mushrooms grow near Seattle?
11 species show up in the observation record within about 10 miles of Seattle, including Morel, King Bolete, Matsutake, Chanterelle, Hedgehog, Oyster, Lobster, Bear's Head. The calendar above shows when each one typically fruits.
Want live conditions instead of climatology? The Forayz map layers soil moisture, soil temperature, snow cover, and recent burns over the same area.
Nearby Calendars in Washington
- Bellingham Mushroom Calendar
- Cle Elum Mushroom Calendar
- Darrington Mushroom Calendar
- Easton Mushroom Calendar
- Everett Mushroom Calendar
- Greenwater Mushroom Calendar
- Index Mushroom Calendar
- Ione Mushroom Calendar
- Kalaloch Mushroom Calendar
- Leavenworth Mushroom Calendar
- Long Beach Mushroom Calendar
- Mazama Mushroom Calendar