Best Time to See Great Blue Herons in Maine
August, September and July is the best time to see great blue herons in Maine. Based on 1,724 verified iNaturalist observations, here is exactly when great blue herons are most active across the year in Maine.
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 · Hilary Rose Dawson CC BY
Great Blue Heron · oksanaetal CC BY
Great Blue Heron · Elizabeth Axley CC BY
1,724 verified observations of great blue herons in Maine, recorded across 12 months of the year on iNaturalist.
When great blue herons are recorded in Maine
Peak month
August
418 records (24.2% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 11 | 0.6% |
| February | 6 | 0.3% |
| March | 16 | 0.9% |
| April | 80 | 4.6% |
| May | 125 | 7.3% |
| June | 161 | 9.3% |
| Julypeak | 308 | 17.9% |
| Augustpeak | 418 | 24.2% |
| Septemberpeak | 314 | 18.2% |
| October | 213 | 12.4% |
| November | 57 | 3.3% |
| December | 15 | 0.9% |
Great Blue Herons you are most likely to see
| Species | Verified observations |
|---|---|
| Great Blue Heron | 1,724 |
Weather to expect, source Open-Meteo
Typical weather in Maine
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 53 to 80 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 28°F | 11°F | 4" |
| Feb | 28°F | 11°F | 3.1" |
| Mar | 39°F | 20°F | 2.7" |
| Apr | 51°F | 32°F | 4.8" |
| May | 64°F | 43°F | 3.2" |
| Jun | 74°F | 54°F | 3.7" |
| Julbest time | 80°F | 62°F | 4.9" |
| Augbest time | 77°F | 60°F | 4.7" |
| Sepbest time | 69°F | 53°F | 4.4" |
| Oct | 58°F | 43°F | 5.3" |
| Nov | 43°F | 29°F | 3.8" |
| Dec | 34°F | 20°F | 5" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Maine. Weather varies year to year, so treat these as a guide.
Sightings of great blue herons in Maine peak in August, when 418 of the year's 1,724 verified observations are logged — about 24.2% of the annual total. Activity stays high through August, September and July.
The quietest stretch is February, when great blue herons are hardest to find — February sees just 6 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 Maine 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 Maine
- Acadia National Park — National Park
- Appalachian National Scenic Trail — National Scenic Trail
- Katahdin Woods and Waters National Monument — National Monument
- Saint Croix Island International Historic Site — International Historic Site
- Frances Perkins National Monument — National Monument
- Maine Acadian Culture
Frequently asked questions
What is the best month to see great blue herons in Maine?+
August is the single best month, and the broader peak window runs through August, September and July, based on 1,724 verified iNaturalist observations.
When are great blue herons hardest to see in Maine?+
February is the quietest month for great blue herons in Maine, with only 6 verified records.
Are great blue herons active year-round in Maine?+
Great blue herons are recorded in 12 of 12 months in Maine, so they can be seen year-round, with a clear peak in August.
More wildlife in Maine