Swimming in Portland in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Portland in september 2025.
In september, according to seasonal norms, the sea temperature in Portland is:
Minimum: 54°F
Average: 56°F
Maximum: 59°F
Other useful seasonal weather averages in september:
- Outside temperature: 58°F to 76°F
- Most common weather: "Clear/Sunny"
- The wind blows at 9.3mph
- It rains a total of 3.5in, over 5 day(s).
Should we swim in Portland in september?
No... The water temperature in Portland in september is freezing
You won't be able to swim in Portland in september! The water temperature is freezing, reaching as low as 54°F (and only 59°F at best)! Our advice: if you are going to Portland this month, plan to sightsee and forget the beach!
Note also that in september, the climate is good with an average outside temperature of 67°F, 3.5in of precipitation (over 5 days) and 79.41 % humidity.
Water and normal seasonal temperatures in Portland in september
| September | |||
| Average sea temperature | 56°F | ||
| Minimum sea temperature | 54°F | ||
| Maximum sea temperature | 59°F | ||
| Average outside temperature | 68°F | ||
| Maximum outside temperature | 77°F | ||
| Minimum outside temperature | 59°F | ||
| Wind speed | 6.2mph | ||
| Wind temperature | 59°F | ||
| Precipitation | 3.5in | ||
| Number of days of rain | 5 jour(s) (15%) | ||
| Humidity | 80% | ||
| Visibility in kilometers | 9.01km | ||
| Cloud cover | 30% | ||
| Our opinion | freezing swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Portland
Swim elsewhere in the United States (USA) in september
Swim in the United States (USA) in september: sea temperature by city