Best Time to See Seals in Delaware
March, February and January is the best time to see seals in Delaware. Based on 278 verified iNaturalist observations, here is exactly when seals are most active across the year in Delaware.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
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 |
Sightings of seals in Delaware peak in March, when 124 of the year's 278 verified observations are logged — about 44.6% of the annual total. Activity stays high through March, February and January.
The quietest stretch is June, July and August, when seals are hardest to find — no verified records exist for June. If a reliable sighting matters, plan around the peak window rather than the off-season.
The seals you are most likely to encounter in Delaware are Grey Seal, Harbor Seal and Harp Seal — the most-recorded species in the state. Each keeps its own seasonal rhythm, but the month-by-month pattern above reflects every reported sighting together.
Where to go
Best places to see seals in Delaware
- Captain John Smith Chesapeake National Historic Trail — National Historic Trail
- Chesapeake Bay
- First State National Historical Park — National Historical Park
- Washington-Rochambeau Revolutionary Route National Historic Trail — National Historic Trail
Tours and experiences nearby
Viator
Book a seal tour in Delaware
Guided wildlife tours, boat trips and nature experiences, with free cancellation on most.
Booking.com
Stay near Captain John Smith Chesapeake National Historic Trail
Compare hotels, cabins and lodges close to the best seal viewing in Delaware.
Frequently asked questions
What is the best month to see seals in Delaware?+
March is the single best month, and the broader peak window runs through March, February and January, based on 278 verified iNaturalist observations.
When are seals hardest to see in Delaware?+
June is the quietest month for seals in Delaware, with no verified records on iNaturalist.
Are seals active year-round in Delaware?+
Seals are recorded in 7 of 12 months in Delaware, concentrated around March and February.
More wildlife in Delaware