Best Time to See Great Blue Herons in Massachusetts
May, April and June is the best time to see great blue herons in Massachusetts. Based on 9,013 verified iNaturalist observations, here is exactly when great blue herons are most active across the year in Massachusetts.
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 · Andrew Hrycyna CC BY
Great Blue Heron · Andrew Hrycyna CC BY
Great Blue Heron · Public domain CC0
9,013 verified observations of great blue herons in Massachusetts, recorded across 12 months of the year on iNaturalist.
When great blue herons are recorded in Massachusetts
Peak month
May
1,263 records (14% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 280 | 3.1% |
| February | 181 | 2% |
| March | 436 | 4.8% |
| Aprilpeak | 1,247 | 13.8% |
| Maypeak | 1,263 | 14% |
| Junepeak | 1,176 | 13% |
| July | 1,003 | 11.1% |
| August | 945 | 10.5% |
| September | 1,005 | 11.2% |
| October | 753 | 8.4% |
| November | 449 | 5% |
| December | 275 | 3.1% |
Great Blue Herons you are most likely to see
| Species | Verified observations |
|---|---|
| Great Blue Heron | 9,013 |
Weather to expect, source Open-Meteo
Typical weather in Massachusetts
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 38 to 78 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 37°F | 22°F | 3.8" |
| Feb | 39°F | 22°F | 3.4" |
| Mar | 48°F | 28°F | 3.6" |
| Aprbest time | 57°F | 38°F | 4.6" |
| Maybest time | 68°F | 47°F | 3.4" |
| Junbest time | 78°F | 58°F | 3.6" |
| Jul | 83°F | 65°F | 5.4" |
| Aug | 82°F | 64°F | 3.5" |
| Sep | 73°F | 56°F | 5.3" |
| Oct | 62°F | 47°F | 5.3" |
| Nov | 50°F | 34°F | 3.1" |
| Dec | 42°F | 27°F | 5.9" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Massachusetts. Weather varies year to year, so treat these as a guide.
Sightings of great blue herons in Massachusetts peak in May, when 1,263 of the year's 9,013 verified observations are logged — about 14% of the annual total. Activity stays high through May, April and June.
The quietest stretch is February, when great blue herons are hardest to find — February sees just 181 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 Massachusetts 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 Massachusetts
- Appalachian National Scenic Trail — National Scenic Trail
- Blackstone River Valley National Historical Park — National Historical Park
- Boston Harbor Islands National Recreation Area — National Recreation Area
- Cape Cod National Seashore — National Seashore
- Adams National Historical Park — National Historical Park
- Boston African American National Historic Site — National Historic Site
Frequently asked questions
What is the best month to see great blue herons in Massachusetts?+
May is the single best month, and the broader peak window runs through May, April and June, based on 9,013 verified iNaturalist observations.
When are great blue herons hardest to see in Massachusetts?+
February is the quietest month for great blue herons in Massachusetts, with only 181 verified records.
Are great blue herons active year-round in Massachusetts?+
Great blue herons are recorded in 12 of 12 months in Massachusetts, so they can be seen year-round, with a clear peak in May.