Best Time to See Cottonmouths in Tennessee
April, March and May is the best time to see cottonmouths in Tennessee. Based on 869 verified iNaturalist observations, here is exactly when cottonmouths are most active across the year in Tennessee.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
Northern Cottonmouth · kirk gardner CC BY
Northern Cottonmouth · Mila Turov CC BY
Northern Cottonmouth · Joshua Liverman CC BY
869 verified observations of cottonmouths in Tennessee, recorded across 12 months of the year on iNaturalist.
When cottonmouths are recorded in Tennessee
Peak month
April
172 records (19.8% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 11 | 1.3% |
| February | 14 | 1.6% |
| Marchpeak | 121 | 13.9% |
| Aprilpeak | 172 | 19.8% |
| Maypeak | 110 | 12.7% |
| June | 75 | 8.6% |
| July | 58 | 6.7% |
| August | 56 | 6.4% |
| September | 84 | 9.7% |
| October | 98 | 11.3% |
| November | 52 | 6% |
| December | 18 | 2.1% |
Cottonmouths you are most likely to see
| Species | Verified observations |
|---|---|
| Northern Cottonmouth | 869 |
Weather to expect, source Open-Meteo
Typical weather in Tennessee
Recent typical conditions by month, so you can plan a trip around both when cottonmouths are active and what the weather is doing. The best months to look for cottonmouths sit around 42 to 77 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 49°F | 33°F | 6" |
| Feb | 54°F | 36°F | 7.3" |
| Marbest time | 62°F | 42°F | 7.5" |
| Aprbest time | 68°F | 48°F | 4.7" |
| Maybest time | 77°F | 58°F | 5.3" |
| Jun | 84°F | 65°F | 6.2" |
| Jul | 87°F | 70°F | 7.4" |
| Aug | 86°F | 69°F | 8.3" |
| Sep | 82°F | 64°F | 3.2" |
| Oct | 72°F | 53°F | 4.8" |
| Nov | 59°F | 41°F | 2.9" |
| Dec | 54°F | 38°F | 5.9" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Tennessee. Weather varies year to year, so treat these as a guide.
Sightings of cottonmouths in Tennessee peak in April, when 172 of the year's 869 verified observations are logged — about 19.8% of the annual total. Activity stays high through April, March and May.
The quietest stretch is January and February, when cottonmouths are hardest to find — January sees just 11 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The cottonmouths you are most likely to encounter in Tennessee are Northern Cottonmouth — 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 cottonmouths in Tennessee
- Appalachian National Scenic Trail — National Scenic Trail
- Big South Fork National River & Recreation Area — National River & Recreation Area
- Cumberland Gap National Historical Park — National Historical Park
- Great Smoky Mountains National Park — National Park
- Natchez Trace Parkway — Parkway
- Obed Wild & Scenic River — Wild & Scenic River
Frequently asked questions
What is the best month to see cottonmouths in Tennessee?+
April is the single best month, and the broader peak window runs through April, March and May, based on 869 verified iNaturalist observations.
When are cottonmouths hardest to see in Tennessee?+
January is the quietest month for cottonmouths in Tennessee, with only 11 verified records.
Are cottonmouths active year-round in Tennessee?+
Cottonmouths are recorded in 12 of 12 months in Tennessee, so they can be seen year-round, with a clear peak in April.
More places to see cottonmouths
More wildlife in Tennessee