Best Time to See Dolphins in Rhode Island
August, November and March is the best time to see dolphins in Rhode Island. Based on 35 verified iNaturalist observations, here is exactly when dolphins are most active across the year in Rhode Island.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Common Dolphin · Martin Kaehrle CC BY
Common Dolphin · Martin Kaehrle CC BY
Bottlenose Dolphins · Martin Kaehrle CC BY
35 verified observations of dolphins in Rhode Island, recorded across 10 months of the year on iNaturalist.
When dolphins are recorded in Rhode Island
Peak month
August
8 records (22.9% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 1 | 2.9% |
| Marchpeak | 5 | 14.3% |
| April | 0 | 0% |
| May | 1 | 2.9% |
| June | 2 | 5.7% |
| July | 4 | 11.4% |
| Augustpeak | 8 | 22.9% |
| September | 2 | 5.7% |
| October | 4 | 11.4% |
| Novemberpeak | 6 | 17.1% |
| December | 2 | 5.7% |
Dolphins you are most likely to see
| Species | Verified observations |
|---|---|
| Common Dolphin | 15 |
| Tamanend's Bottlenose Dolphin | 5 |
| Long-finned Pilot Whale | 4 |
| Common Bottlenose Dolphin | 1 |
| Atlantic White-sided Dolphin | 1 |
Weather to expect, source Open-Meteo
Typical weather in Rhode Island
Recent typical conditions by month, so you can plan a trip around both when dolphins are active and what the weather is doing. The best months to look for dolphins sit around 31 to 81 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 39°F | 25°F | 4.3" |
| Feb | 41°F | 25°F | 4" |
| Marbest time | 49°F | 31°F | 4" |
| Apr | 57°F | 40°F | 5.2" |
| May | 67°F | 49°F | 4" |
| Jun | 77°F | 59°F | 3.7" |
| Jul | 83°F | 67°F | 4.9" |
| Augbest time | 81°F | 66°F | 3.7" |
| Sep | 74°F | 59°F | 5" |
| Oct | 64°F | 50°F | 5.9" |
| Novbest time | 52°F | 37°F | 3.6" |
| Dec | 44°F | 30°F | 6.5" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Rhode Island. Weather varies year to year, so treat these as a guide.
Sightings of dolphins in Rhode Island peak in August, when 8 of the year's 35 verified observations are logged — about 22.9% of the annual total. Activity stays high through August, November and March.
The quietest stretch is January, April and February, when dolphins are hardest to find — no verified records exist for January. If a reliable sighting matters, plan around the peak window rather than the off-season.
The dolphins you are most likely to encounter in Rhode Island are Common Dolphin, Tamanend's Bottlenose Dolphin and Long-finned Pilot 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 dolphins in Rhode Island
- Blackstone River Valley National Historical Park — National Historical Park
- Roger Williams National Memorial — National Memorial
- Touro Synagogue National Historic Site — National Historic Site
- Washington-Rochambeau Revolutionary Route National Historic Trail — National Historic Trail
Frequently asked questions
What is the best month to see dolphins in Rhode Island?+
August is the single best month, and the broader peak window runs through August, November and March, based on 35 verified iNaturalist observations.
When are dolphins hardest to see in Rhode Island?+
January is the quietest month for dolphins in Rhode Island, with no verified records on iNaturalist.
Are dolphins active year-round in Rhode Island?+
Dolphins are recorded in 10 of 12 months in Rhode Island, concentrated around August and November.
More places to see dolphins
More wildlife in Rhode Island