Best Time to See Humpback Whales in Massachusetts
August, July and September is the best time to see humpback whales in Massachusetts. Based on 699 verified iNaturalist observations, here is exactly when humpback whales 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 10, 2026.
Humpback Whale · Jayne Buckley Sykes CC BY
Humpback Whale · Public domain CC0
Humpback Whale · Robbie CC BY
699 verified observations of humpback whales in Massachusetts, recorded across 12 months of the year on iNaturalist.
When humpback whales are recorded in Massachusetts
Peak month
August
265 records (37.9% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 7 | 1% |
| February | 2 | 0.3% |
| March | 2 | 0.3% |
| April | 63 | 9% |
| May | 38 | 5.4% |
| June | 62 | 8.9% |
| Julypeak | 140 | 20% |
| Augustpeak | 265 | 37.9% |
| Septemberpeak | 85 | 12.2% |
| October | 21 | 3% |
| November | 8 | 1.1% |
| December | 6 | 0.9% |
Humpback Whales you are most likely to see
| Species | Verified observations |
|---|---|
| Humpback Whale | 699 |
Weather to expect, source Open-Meteo
Typical weather in Massachusetts
Recent typical conditions by month, so you can plan a trip around both when humpback whales are active and what the weather is doing. The best months to look for humpback whales sit around 56 to 83 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" |
| Apr | 57°F | 38°F | 4.6" |
| May | 68°F | 47°F | 3.4" |
| Jun | 78°F | 58°F | 3.6" |
| Julbest time | 83°F | 65°F | 5.4" |
| Augbest time | 82°F | 64°F | 3.5" |
| Sepbest time | 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.
More on humpback whales in Massachusetts:
Sightings of humpback whales in Massachusetts peak in August, when 265 of the year's 699 verified observations are logged — about 37.9% of the annual total. Activity stays high through August, July and September.
The quietest stretch is February and March, when humpback whales are hardest to find — February sees just 2 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The humpback whales you are most likely to encounter in Massachusetts are Humpback Whale — 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 humpback whales 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
Go see them · Massachusetts
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Frequently asked questions
What is the best month to see humpback whales in Massachusetts?+
August is the single best month, and the broader peak window runs through August, July and September, based on 699 verified iNaturalist observations.
When are humpback whales hardest to see in Massachusetts?+
February is the quietest month for humpback whales in Massachusetts, with only 2 verified records.
Are humpback whales active year-round in Massachusetts?+
Humpback whales are recorded in 12 of 12 months in Massachusetts, so they can be seen year-round, with a clear peak in August.
More places to see humpback whales
More wildlife in Massachusetts