Jellyfishes in Washington in October
Yes, October is a good month to see jellyfishes in Washington. It is the 5th busiest month of the year, with 596 of the 6,847 sightings logged across the year (8.7%), based on verified iNaturalist records.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Good month for jellyfishes in Washington
8.7%
of yearly sightings
596
records in October
#5
busiest month of 12
6,847
verified records a year
September 11.6%, October 8.7%, November 4.8%. Busiest month is July at 23.8%.
6,847 verified observations of jellyfishes in Washington, recorded across 12 months of the year on iNaturalist.
When jellyfishes are recorded in Washington
Peak month
July
1,633 records (23.8% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 94 | 1.4% |
| February | 44 | 0.6% |
| March | 58 | 0.8% |
| April | 108 | 1.6% |
| May | 408 | 6% |
| Junepeak | 1,485 | 21.7% |
| Julypeak | 1,633 | 23.8% |
| Augustpeak | 1,166 | 17% |
| September | 791 | 11.6% |
| October | 596 | 8.7% |
| November | 326 | 4.8% |
| December | 138 | 2% |
Jellyfishes you are most likely to see
| Species | Verified observations |
|---|---|
| Egg-yolk Jelly | 2,875 |
| Pacific Lion's Mane Jelly | 1,923 |
| Greater Moon Jelly | 938 |
| Pacific Sea Nettle | 372 |
| Asian moon jellyfish | 4 |
| Common Moon Jelly | 2 |
| Crown Jellies | 1 |
In Washington, October carries 8.7% of the year's jellyfishes sightings, about 0.4 points above an even month-to-month split. That makes it the 5th busiest of the twelve months, out of 12 months with recorded activity.
Activity is easing off from September (11.6%) into October, and it heads toward November (4.8%) after. The busiest month is July (23.8%), so if timing is flexible, that window is the safer bet.
The jellyfishes most often recorded in Washington are Egg-yolk Jelly, Pacific Lion's Mane Jelly and Greater Moon Jelly. Those counts are annual totals rather than a October split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in October itself.
Which jellyfishes you are most likely to see
- Egg-yolk Jelly2,875 records
- Pacific Lion's Mane Jelly1,923 records
- Greater Moon Jelly938 records
- Pacific Sea Nettle372 records
- Asian moon jellyfish4 records
- Common Moon Jelly2 records
Plan your jellyfish trip in Washington
Start with live tours near Ebey's Landing National Historical Reserve, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Ebey's Landing National Historical Reserve
Use the live GetYourGuide widget to compare local departures and activity styles close to the main jellyfish viewing area.
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Stay nearbyStay near Ebey's Landing National Historical Reserve
Compare hotels, cabins and lodges close to the best jellyfish viewing area in Washington.
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Broader backupBook a jellyfish tour in Washington
Compare guided wildlife tours, boat trips and nature experiences if you want a second travel network beyond the live widget.
Frequently asked questions
Can you see jellyfishes in Washington in October?+
Yes. October accounts for 596 of the 6,847 verified jellyfishes sightings logged in Washington across the year, which is 8.7% of the annual total.
Is October a good time to see jellyfishes in Washington?+
October is the 5th busiest month. It is workable, though July and June is the stronger window for a reliable sighting.
What month is best for jellyfishes in Washington?+
July is the single busiest month, with the broader peak running through July, June and August, based on 6,847 verified observations.
Which jellyfishes are you most likely to see in Washington?+
The most-recorded species in Washington are Egg-yolk Jelly, Pacific Lion's Mane Jelly and Greater Moon Jelly, based on all-time iNaturalist counts.
See jellyfishes in Washington in other months
More places to see jellyfishes
More wildlife in Washington