Seals in Delaware in December
Yes, December is a good month to see seals in Delaware. It is the 4th busiest month of the year, with 24 of the 278 sightings logged across the year (8.6%), 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 seals in Delaware
8.6%
of yearly sightings
24
records in December
#4
busiest month of 12
278
verified records a year
November 0.4%, December 8.6%, January 19.1%. Busiest month is March at 44.6%.
278 verified observations of seals in Delaware, recorded across 7 months of the year on iNaturalist.
When seals are recorded in Delaware
Peak month
March
124 records (44.6% of the year)
| Month | Observations | Share |
|---|---|---|
| Januarypeak | 53 | 19.1% |
| Februarypeak | 62 | 22.3% |
| Marchpeak | 124 | 44.6% |
| April | 13 | 4.7% |
| May | 1 | 0.4% |
| June | 0 | 0% |
| July | 0 | 0% |
| August | 0 | 0% |
| September | 0 | 0% |
| October | 0 | 0% |
| November | 1 | 0.4% |
| December | 24 | 8.6% |
Seals you are most likely to see
| Species | Verified observations |
|---|---|
| Grey Seal | 143 |
| Harbor Seal | 123 |
| Harp Seal | 2 |
In Delaware, December carries 8.6% of the year's seals sightings, about 0.3 points above an even month-to-month split. That makes it the 4th busiest of the twelve months, out of 7 months with recorded activity.
Activity is rising from November (0.4%) into December, and it heads toward January (19.1%) after. The busiest month is March (44.6%), so if timing is flexible, that window is the safer bet.
The seals most often recorded in Delaware are Grey Seal, Harbor Seal and Harp Seal. Those counts are annual totals rather than a December split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in December itself.
Which seals you are most likely to see
- Grey Seal143 records
- Harbor Seal123 records
- Harp Seal2 records
Plan your seal 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.
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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 seal viewing area.
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Frequently asked questions
Can you see seals in Delaware in December?+
Yes. December accounts for 24 of the 278 verified seals sightings logged in Delaware across the year, which is 8.6% of the annual total.
Is December a good time to see seals in Delaware?+
December is the 4th busiest month. It is workable, though March and February is the stronger window for a reliable sighting.
What month is best for seals in Delaware?+
March is the single busiest month, with the broader peak running through March, February and January, based on 278 verified observations.
Which seals are you most likely to see in Delaware?+
The most-recorded species in Delaware are Grey Seal, Harbor Seal and Harp Seal, based on all-time iNaturalist counts.
See seals in Delaware in other months
More wildlife in Delaware