Best Time to See Great Blue Herons in Maryland
May, June and April is the best time to see great blue herons in Maryland. Based on 11,994 verified iNaturalist observations, here is exactly when great blue herons are most active across the year in Maryland.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 20, 2026.
Great Blue Heron · Matt Felperin CC BY
Great Blue Heron · Zachary Dankowicz CC BY
Great Blue Heron · Matthew Gerke CC BY
11,994 verified observations of great blue herons in Maryland, recorded across 12 months of the year on iNaturalist.
When great blue herons are recorded in Maryland
Peak month
May
1,401 records (11.7% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 739 | 6.2% |
| February | 642 | 5.4% |
| March | 747 | 6.2% |
| Aprilpeak | 1,180 | 9.8% |
| Maypeak | 1,401 | 11.7% |
| Junepeak | 1,364 | 11.4% |
| July | 1,111 | 9.3% |
| August | 1,093 | 9.1% |
| September | 1,048 | 8.7% |
| October | 1,048 | 8.7% |
| November | 852 | 7.1% |
| December | 769 | 6.4% |
Great Blue Herons you are most likely to see
| Species | Verified observations |
|---|---|
| Great Blue Heron | 11,994 |
Weather to expect, source Open-Meteo
Typical weather in Maryland
Recent typical conditions by month, so you can plan a trip around both when great blue herons are active and what the weather is doing. The best months to look for great blue herons sit around 45 to 83 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 44°F | 30°F | 3.3" |
| Feb | 48°F | 31°F | 3.9" |
| Mar | 56°F | 37°F | 3.9" |
| Aprbest time | 66°F | 45°F | 4.7" |
| Maybest time | 73°F | 54°F | 4.7" |
| Junbest time | 83°F | 64°F | 5.4" |
| Jul | 89°F | 70°F | 7.3" |
| Aug | 85°F | 69°F | 7.6" |
| Sep | 79°F | 62°F | 4.9" |
| Oct | 69°F | 52°F | 4.9" |
| Nov | 56°F | 40°F | 3.2" |
| Dec | 49°F | 34°F | 4.8" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Maryland. Weather varies year to year, so treat these as a guide.
Sightings of great blue herons in Maryland peak in May, when 1,401 of the year's 11,994 verified observations are logged — about 11.7% of the annual total. Activity stays high through May, June and April.
The quietest stretch is February, January and March, when great blue herons are hardest to find — February sees just 642 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The great blue herons you are most likely to encounter in Maryland are Great Blue Heron — 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 great blue herons in Maryland
- Antietam National Battlefield — National Battlefield
- Appalachian National Scenic Trail — National Scenic Trail
- Assateague Island National Seashore — National Seashore
- Captain John Smith Chesapeake National Historic Trail — National Historic Trail
- Chesapeake & Ohio Canal National Historical Park — National Historical Park
- Chesapeake Bay
Frequently asked questions
What is the best month to see great blue herons in Maryland?+
May is the single best month, and the broader peak window runs through May, June and April, based on 11,994 verified iNaturalist observations.
When are great blue herons hardest to see in Maryland?+
February is the quietest month for great blue herons in Maryland, with only 642 verified records.
Are great blue herons active year-round in Maryland?+
Great blue herons are recorded in 12 of 12 months in Maryland, so they can be seen year-round, with a clear peak in May.
More wildlife in Maryland