Dolphins in Delaware in May
Yes, May is one of the best months to see dolphins in Delaware. It is the 3rd busiest month of the year, with 32 of the 228 sightings logged across the year (14%), 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 dolphins in Delaware
14%
of yearly sightings
32
records in May
#3
busiest month of 12
228
verified records a year
April 7.5%, May 14%, June 11.8%. Busiest month is August at 20.2%.
228 verified observations of dolphins in Delaware, recorded across 11 months of the year on iNaturalist.
When dolphins are recorded in Delaware
Peak month
August
46 records (20.2% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 1 | 0.4% |
| February | 1 | 0.4% |
| March | 9 | 3.9% |
| April | 17 | 7.5% |
| Maypeak | 32 | 14% |
| June | 27 | 11.8% |
| Julypeak | 40 | 17.5% |
| Augustpeak | 46 | 20.2% |
| September | 22 | 9.6% |
| October | 32 | 14% |
| November | 1 | 0.4% |
| December | 0 | 0% |
Dolphins you are most likely to see
| Species | Verified observations |
|---|---|
| Tamanend's Bottlenose Dolphin | 210 |
| Common Dolphin | 1 |
In Delaware, May carries 14% of the year's dolphins sightings, about 5.7 points above an even month-to-month split. That makes it the 3rd busiest of the twelve months, out of 11 months with recorded activity.
Activity is rising from April (7.5%) into May, and it heads toward June (11.8%) after. This is right inside the peak window, so May is one of the surest months to plan a trip around.
The dolphins most often recorded in Delaware are Tamanend's Bottlenose Dolphin and Common Dolphin. Those counts are annual totals rather than a May split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in May itself.
Which dolphins you are most likely to see
- Tamanend's Bottlenose Dolphin210 records
- Common Dolphin1 records
Plan your dolphin trip in Delaware
Start with live tours near Captain John Smith Chesapeake National Historic Trail, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Captain John Smith Chesapeake National Historic Trail
Use the live GetYourGuide widget to compare local departures and activity styles close to the main dolphin viewing area.
Booking.com
Stay nearbyStay near Captain John Smith Chesapeake National Historic Trail
Compare hotels, cabins and lodges close to the best dolphin viewing area in Delaware.
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Broader backupBook a dolphin tour in Delaware
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 dolphins in Delaware in May?+
Yes. May accounts for 32 of the 228 verified dolphins sightings logged in Delaware across the year, which is 14% of the annual total.
Is May a good time to see dolphins in Delaware?+
May is one of the best months. It ranks 3rd of the year and sits inside the peak window of August, July and May.
What month is best for dolphins in Delaware?+
August is the single busiest month, with the broader peak running through August, July and May, based on 228 verified observations.
Which dolphins are you most likely to see in Delaware?+
The most-recorded species in Delaware are Tamanend's Bottlenose Dolphin and Common Dolphin, based on all-time iNaturalist counts.
See dolphins in Delaware in other months
More places to see dolphins
More wildlife in Delaware