| Stewart Water Aerodrome | |
| Tc: | CAC9 |
| Type: | Public |
| Operator: | District of Stewart |
| City-Served: | Stewart, British Columbia |
| Location: | Portland Canal |
| Timezone: | PST |
| Summer: | PDT |
| Elevation-F: | 0 |
| Coordinates: | 55.9167°N -130°W |
| Pushpin Map: | Canada British Columbia#Canada |
| Pushpin Label: | CAC9 |
| Pushpin Map Caption: | Location in British Columbia |
| R1-Number: | n/a |
| R1-Length-F: | n/a |
| R1-Length-M: | n/a |
| R1-Surface: | Water |
| Footnotes: | Source: Water Aerodrome Supplement |
Stewart Water Aerodrome is located on the Portland Canal, 1NM south of Stewart, British Columbia, Canada. It shares its airspace with the nearby Stewart Aerodrome and Hyder Seaplane Base, and its water runway in the Portland Canal exists on the Canada–United States border.