Swimming in Ketchikan in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Ketchikan in september 2025.
In september, according to seasonal norms, the sea temperature in Ketchikan is:
Minimum: 51°F
Average: 54°F
Maximum: 57°F
Other useful seasonal weather averages in september:
- Outside temperature: 50°F to 57°F
- Most common weather: "Moderate rain at times"
- The wind blows at 5.6mph
- It rains a total of 17in, over 14 day(s).
Should we swim in Ketchikan in september?
No... The water temperature in Ketchikan in september is freezing
You won't be able to swim in Ketchikan in september! The water temperature is freezing, reaching as low as 51°F (and only 57°F at best)! Our advice: if you are going to Ketchikan this month, plan to sightsee and forget the beach!
Note also that in september, the climate is tolerable with an average outside temperature of 54°F, 17in of precipitation (over 14 days) and 90.9 % humidity.
Water and normal seasonal temperatures in Ketchikan in september
| September | |||
| Average sea temperature | 54°F | ||
| Minimum sea temperature | 51°F | ||
| Maximum sea temperature | 57°F | ||
| Average outside temperature | 54°F | ||
| Maximum outside temperature | 58°F | ||
| Minimum outside temperature | 50°F | ||
| Wind speed | 8.7mph | ||
| Wind temperature | 49°F | ||
| Precipitation | 17in | ||
| Number of days of rain | 14 jour(s) (46%) | ||
| Humidity | 91% | ||
| Visibility in kilometers | 8.38km | ||
| Cloud cover | 58% | ||
| Our opinion | freezing swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Ketchikan
Swim elsewhere in Alaska in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Anchorage in september | 52°F | 54°F | freezing swimming | Anchor Point in september | 53°F | 55°F | freezing swimming | Dillingham in september | 53°F | 56°F | freezing swimming | Dutch Harbor in september | 49°F | 52°F | freezing swimming |