Whales in Delaware in May
Yes, May is one of the best months to see whales in Delaware. It is the 2nd busiest month of the year, with 201 of the 1,760 sightings logged across the year (11.4%), 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 whales in Delaware
11.4%
of yearly sightings
201
records in May
#2
busiest month of 12
1,760
verified records a year
April 9%, May 11.4%, June 14.5%. Busiest month is June at 14.5%.
1,760 verified observations of whales in Delaware, recorded across 12 months of the year on iNaturalist.
When whales are recorded in Delaware
Peak month
June
256 records (14.5% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 100 | 5.7% |
| February | 108 | 6.1% |
| March | 106 | 6% |
| April | 159 | 9% |
| Maypeak | 201 | 11.4% |
| Junepeak | 256 | 14.5% |
| Julypeak | 193 | 11% |
| August | 179 | 10.2% |
| September | 124 | 7% |
| October | 150 | 8.5% |
| November | 104 | 5.9% |
| December | 80 | 4.5% |
Whales you are most likely to see
| Species | Verified observations |
|---|---|
| White-tailed Deer | 1,500 |
| Tamanend's Bottlenose Dolphin | 212 |
| Humpback Whale | 12 |
| Fin Whale | 2 |
| Domestic Cattle | 2 |
| Common Dolphin | 1 |
| Sika Deer | 1 |
In Delaware, May carries 11.4% of the year's whales sightings, about 3.1 points above an even month-to-month split. That makes it the 2nd busiest of the twelve months, out of 12 months with recorded activity.
Activity is rising from April (9%) into May, and it heads toward June (14.5%) after. This is right inside the peak window, so May is one of the surest months to plan a trip around.
The whales most often recorded in Delaware are White-tailed Deer, Tamanend's Bottlenose Dolphin and Humpback Whale. 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 whales you are most likely to see
- White-tailed Deer1,500 records
- Tamanend's Bottlenose Dolphin212 records
- Humpback Whale12 records
- Fin Whale2 records
- Domestic Cattle2 records
- Common Dolphin1 records
Plan your whale 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 whale viewing area.
Booking.com
Stay nearbyStay near Captain John Smith Chesapeake National Historic Trail
Compare hotels, cabins and lodges close to the best whale viewing area in Delaware.
Viator
Broader backupBook a whale 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 whales in Delaware in May?+
Yes. May accounts for 201 of the 1,760 verified whales sightings logged in Delaware across the year, which is 11.4% of the annual total.
Is May a good time to see whales in Delaware?+
May is one of the best months. It ranks 2nd of the year and sits inside the peak window of June, May and July.
What month is best for whales in Delaware?+
June is the single busiest month, with the broader peak running through June, May and July, based on 1,760 verified observations.
Which whales are you most likely to see in Delaware?+
The most-recorded species in Delaware are White-tailed Deer, Tamanend's Bottlenose Dolphin and Humpback Whale, based on all-time iNaturalist counts.
See whales in Delaware in other months
More wildlife in Delaware