Sargasso Shearwater has been seen by:
| Birder | Location | Town | County | Date |
|---|---|---|---|---|
| Carlos Pedro | Block Canyon | Pelagic | Offshore | 05-Sep-2015 |
| Jan St.Jean | Block Canyon and shelf | Pelagic | Offshore | 03-Sep-2015 |
| Barbara Sherman | Block Canyon and shelf | Pelagic | Offshore | 03-Sep-2015 |
| Wayne Munns | Block Canyon and shelf | Pelagic | Offshore | 03-Sep-2015 |
| Paul L'Etoile | Block Canyon | Pelagic | Offshore | 03-Sep-2015 |