Best Time to See Otters in Montana
May, August and January is the best time to see otters in Montana. Based on 75 verified iNaturalist observations, here is exactly when otters are most active across the year in Montana.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
North American River Otter · Cole Wolf CC BY
North American River Otter · Cole Wolf CC BY
North American River Otter · Nick S. CC BY
75 verified observations of otters in Montana, recorded across 12 months of the year on iNaturalist.
When otters are recorded in Montana
Peak month
May
9 records (12% of the year)
| Month | Observations | Share |
|---|---|---|
| Januarypeak | 8 | 10.7% |
| February | 4 | 5.3% |
| March | 7 | 9.3% |
| April | 7 | 9.3% |
| Maypeak | 9 | 12% |
| June | 8 | 10.7% |
| July | 4 | 5.3% |
| Augustpeak | 9 | 12% |
| September | 5 | 6.7% |
| October | 6 | 8% |
| November | 4 | 5.3% |
| December | 4 | 5.3% |
Otters you are most likely to see
| Species | Verified observations |
|---|---|
| North American River Otter | 75 |
Weather to expect, source Open-Meteo
Typical weather in Montana
Recent typical conditions by month, so you can plan a trip around both when otters are active and what the weather is doing. The best months to look for otters sit around 17 to 74 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Janbest time | 29°F | 17°F | 1" |
| Feb | 22°F | 9°F | 1.5" |
| Mar | 33°F | 18°F | 1.1" |
| Apr | 40°F | 24°F | 2.3" |
| Maybest time | 53°F | 36°F | 3.5" |
| Jun | 65°F | 47°F | 3.2" |
| Jul | 75°F | 55°F | 2" |
| Augbest time | 74°F | 54°F | 1.7" |
| Sep | 65°F | 46°F | 2.1" |
| Oct | 46°F | 31°F | 2" |
| Nov | 36°F | 23°F | 1" |
| Dec | 30°F | 18°F | 1" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Montana. Weather varies year to year, so treat these as a guide.
More on otters in Montana:
Sightings of otters in Montana peak in May, when 9 of the year's 75 verified observations are logged — about 12% of the annual total. Activity stays high through May, August and January.
The quietest stretch is February, July and November, when otters are hardest to find — February sees just 4 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The otters you are most likely to encounter in Montana are North American River Otter — 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 otters in Montana
- Big Hole National Battlefield — National Battlefield
- Bighorn Canyon National Recreation Area — National Recreation Area
- Grant-Kohrs Ranch National Historic Site — National Historic Site
- Lewis & Clark National Historic Trail — National Historic Trail
- Nez Perce National Historical Park — National Historical Park
- Yellowstone National Park — National Park
Frequently asked questions
What is the best month to see otters in Montana?+
May is the single best month, and the broader peak window runs through May, August and January, based on 75 verified iNaturalist observations.
When are otters hardest to see in Montana?+
February is the quietest month for otters in Montana, with only 4 verified records.
Are otters active year-round in Montana?+
Otters are recorded in 12 of 12 months in Montana, so they can be seen year-round, with a clear peak in May.
More places to see otters
More wildlife in Montana