Best Time to See Bats in Connecticut
August, July and June is the best time to see bats in Connecticut. Based on 236 verified iNaturalist observations, here is exactly when bats are most active across the year in Connecticut.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Eastern Red Bat · Kristof & Yulia CC BY
Big Brown Bat · Public domain CC0
Big Brown Bat · Renee Grebe CC BY
236 verified observations of bats in Connecticut, recorded across 12 months of the year on iNaturalist.
When bats are recorded in Connecticut
Peak month
August
63 records (26.7% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 6 | 2.5% |
| February | 8 | 3.4% |
| March | 12 | 5.1% |
| April | 20 | 8.5% |
| May | 22 | 9.3% |
| Junepeak | 23 | 9.7% |
| Julypeak | 41 | 17.4% |
| Augustpeak | 63 | 26.7% |
| September | 15 | 6.4% |
| October | 10 | 4.2% |
| November | 8 | 3.4% |
| December | 8 | 3.4% |
Bats you are most likely to see
| Species | Verified observations |
|---|---|
| Big Brown Bat | 128 |
| Eastern Red Bat | 30 |
| Silver-haired Bat | 9 |
| Little Brown Bat | 4 |
| Northern Hoary Bat | 3 |
| Eastern Small-footed Myotis | 2 |
| Tri-coloured Bat | 1 |
Weather to expect, source Open-Meteo
Typical weather in Connecticut
Recent typical conditions by month, so you can plan a trip around both when bats are active and what the weather is doing. The best months to look for bats sit around 59 to 84 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 39°F | 24°F | 4.2" |
| Feb | 41°F | 24°F | 3.6" |
| Mar | 49°F | 30°F | 4.2" |
| Apr | 58°F | 39°F | 5.5" |
| May | 68°F | 48°F | 4" |
| Junbest time | 78°F | 59°F | 3.6" |
| Julbest time | 84°F | 66°F | 5.2" |
| Augbest time | 82°F | 65°F | 4.1" |
| Sep | 74°F | 58°F | 5.9" |
| Oct | 64°F | 48°F | 5.6" |
| Nov | 51°F | 35°F | 3.1" |
| Dec | 43°F | 29°F | 5.9" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Connecticut. Weather varies year to year, so treat these as a guide.
More on bats in Connecticut:
Sightings of bats in Connecticut peak in August, when 63 of the year's 236 verified observations are logged — about 26.7% of the annual total. Activity stays high through August, July and June.
The quietest stretch is January, February and November, when bats are hardest to find — January sees just 6 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The bats you are most likely to encounter in Connecticut are Big Brown Bat, Eastern Red Bat and Silver-haired Bat — 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 bats in Connecticut
- Appalachian National Scenic Trail — National Scenic Trail
- Coltsville National Historical Park — National Historical Park
- New England National Scenic Trail — National Scenic Trail
- Washington-Rochambeau Revolutionary Route National Historic Trail — National Historic Trail
- Weir Farm National Historical Park — National Historical Park
Gear to see them
Frequently asked questions
What is the best month to see bats in Connecticut?+
August is the single best month, and the broader peak window runs through August, July and June, based on 236 verified iNaturalist observations.
When are bats hardest to see in Connecticut?+
January is the quietest month for bats in Connecticut, with only 6 verified records.
Are bats active year-round in Connecticut?+
Bats are recorded in 12 of 12 months in Connecticut, so they can be seen year-round, with a clear peak in August.
More places to see bats
More wildlife in Connecticut