Best Time to See Otters in Colorado
April, March and November is the best time to see otters in Colorado. Based on 135 verified iNaturalist observations, here is exactly when otters are most active across the year in Colorado.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
135 verified observations of otters in Colorado, recorded across 12 months of the year on iNaturalist.
When otters are recorded in Colorado
Peak month
April
29 records (21.5% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 7 | 5.2% |
| February | 8 | 5.9% |
| Marchpeak | 16 | 11.9% |
| Aprilpeak | 29 | 21.5% |
| May | 7 | 5.2% |
| June | 9 | 6.7% |
| July | 5 | 3.7% |
| August | 12 | 8.9% |
| September | 12 | 8.9% |
| October | 10 | 7.4% |
| Novemberpeak | 13 | 9.6% |
| December | 7 | 5.2% |
Otters you are most likely to see
| Species | Verified observations |
|---|---|
| North American River Otter | 135 |
Weather to expect, source Open-Meteo
Typical weather in Colorado
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 9 to 46 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 27°F | 5°F | 0.5" |
| Feb | 27°F | 3°F | 0.9" |
| Marbest time | 34°F | 9°F | 1.3" |
| Aprbest time | 46°F | 20°F | 1.1" |
| May | 57°F | 31°F | 2.5" |
| Jun | 69°F | 42°F | 2.1" |
| Jul | 76°F | 49°F | 2.5" |
| Aug | 75°F | 48°F | 1.7" |
| Sep | 69°F | 41°F | 1.1" |
| Oct | 54°F | 27°F | 0.8" |
| Novbest time | 40°F | 18°F | 0.6" |
| Dec | 30°F | 10°F | 0.9" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Colorado. Weather varies year to year, so treat these as a guide.
More on otters in Colorado:
Sightings of otters in Colorado peak in April, when 29 of the year's 135 verified observations are logged — about 21.5% of the annual total. Activity stays high through April, March and November.
The quietest stretch is July, January and May, when otters are hardest to find — July sees just 5 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 Colorado 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 Colorado
- Bent's Old Fort National Historic Site — National Historic Site
- Black Canyon Of The Gunnison National Park — National Park
- Colorado National Monument — National Monument
- Curecanti National Recreation Area — National Recreation Area
- Dinosaur National Monument — National Monument
- Great Sand Dunes National Park & Preserve — National Park & Preserve
Frequently asked questions
What is the best month to see otters in Colorado?+
April is the single best month, and the broader peak window runs through April, March and November, based on 135 verified iNaturalist observations.
When are otters hardest to see in Colorado?+
July is the quietest month for otters in Colorado, with only 5 verified records.
Are otters active year-round in Colorado?+
Otters are recorded in 12 of 12 months in Colorado, so they can be seen year-round, with a clear peak in April.
More places to see otters
More wildlife in Colorado