Jellyfishes in Maine in July
Yes, July is one of the best months to see jellyfishes in Maine. It is the 2nd busiest month of the year, with 454 of the 1,301 sightings logged across the year (34.9%), 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.
Peak month for jellyfishes in Maine
34.9%
of yearly sightings
454
records in July
#2
busiest month of 12
1,301
verified records a year
June 35.2%, July 34.9%, August 18.2%. Busiest month is June at 35.2%.
1,301 verified observations of jellyfishes in Maine, recorded across 11 months of the year on iNaturalist.
When jellyfishes are recorded in Maine
Peak month
June
458 records (35.2% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 5 | 0.4% |
| February | 3 | 0.2% |
| March | 11 | 0.8% |
| April | 12 | 0.9% |
| May | 91 | 7% |
| Junepeak | 458 | 35.2% |
| Julypeak | 454 | 34.9% |
| Augustpeak | 237 | 18.2% |
| September | 27 | 2.1% |
| October | 2 | 0.2% |
| November | 0 | 0% |
| December | 1 | 0.1% |
Jellyfishes you are most likely to see
| Species | Verified observations |
|---|---|
| Atlantic Lion's Mane Jelly | 207 |
| Lion's Mane Jelly | 184 |
| Common Moon Jelly | 120 |
| Egg-yolk Jelly | 5 |
| Dwarf Lion's Mane Jelly | 5 |
| Atlantic Sea Nettle | 1 |
| Greater Moon Jelly | 1 |
| Mauve Stinger | 1 |
In Maine, July carries 34.9% of the year's jellyfishes sightings, about 26.6 points above an even month-to-month split. That makes it the 2nd busiest of the twelve months, out of 11 months with recorded activity.
Activity holds steady between June and July, and it heads toward August (18.2%) after. This is right inside the peak window, so July is one of the surest months to plan a trip around.
The jellyfishes most often recorded in Maine are Atlantic Lion's Mane Jelly, Lion's Mane Jelly and Common Moon Jelly. Those counts are annual totals rather than a July split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in July itself.
Which jellyfishes you are most likely to see
- Atlantic Lion's Mane Jelly207 records
- Lion's Mane Jelly184 records
- Common Moon Jelly120 records
- Egg-yolk Jelly5 records
- Dwarf Lion's Mane Jelly5 records
- Atlantic Sea Nettle1 records
Plan your jellyfish trip in Maine
Start with live tours near Acadia National Park, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Acadia National Park
Use the live GetYourGuide widget to compare local departures and activity styles close to the main jellyfish viewing area.
Booking.com
Stay nearbyStay near Acadia National Park
Compare hotels, cabins and lodges close to the best jellyfish viewing area in Maine.
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Broader backupBook a jellyfish tour in Maine
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 Maine in July?+
Yes. July accounts for 454 of the 1,301 verified jellyfishes sightings logged in Maine across the year, which is 34.9% of the annual total.
Is July a good time to see jellyfishes in Maine?+
July is one of the best months. It ranks 2nd of the year and sits inside the peak window of June, July and August.
What month is best for jellyfishes in Maine?+
June is the single busiest month, with the broader peak running through June, July and August, based on 1,301 verified observations.
Which jellyfishes are you most likely to see in Maine?+
The most-recorded species in Maine are Atlantic Lion's Mane Jelly, Lion's Mane Jelly and Common Moon Jelly, based on all-time iNaturalist counts.
See jellyfishes in Maine in other months
More places to see jellyfishes
More wildlife in Maine