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Sea Temperature in Portland in September
Complete information on the sea temperature range in the Atlantic Ocean in Portland in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Portland. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Portland in September
54°F
MINIMUN
60°F
AVERAGE
66°F
MAXIMUM
Historical Data of Water Temperature in September in Portland
Water Temperature Chart for Atlantic Ocean in Portland in September
Sea Temperature Table in Portland in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 66°C | 54°C | 61°C | 61°C |
| Sep 2 | 64°C | 59°C | 59°C | 61°C |
| Sep 3 | 64°C | 54°C | 55°C | 59°C |
| Sep 4 | 64°C | 59°C | 59°C | 61°C |
| Sep 5 | 63°C | 59°C | 61°C | 61°C |
| Sep 6 | 64°C | 61°C | 61°C | 62°C |
| Sep 7 | 64°C | 61°C | 57°C | 61°C |
| Sep 8 | 64°C | 54°C | 55°C | 58°C |
| Sep 9 | 63°C | 55°C | 54°C | 58°C |
| Sep 10 | 63°C | 61°C | 61°C | 60°C |
| Sep 11 | 63°C | 61°C | 61°C | 61°C |
| Sep 12 | 63°C | 61°C | 57°C | 60°C |
| Sep 13 | 63°C | 54°C | 59°C | 59°C |
| Sep 14 | 63°C | 61°C | 55°C | 60°C |
| Sep 15 | 63°C | 54°C | 54°C | 58°C |
| Sep 16 | 61°C | 59°C | 61°C | 61°C |
| Sep 17 | 63°C | 59°C | 61°C | 61°C |
| Sep 18 | 64°C | 61°C | 54°C | 60°C |
| Sep 19 | 64°C | 61°C | 55°C | 60°C |
| Sep 20 | 63°C | 55°C | 54°C | 58°C |
| Sep 21 | 63°C | 61°C | 54°C | 60°C |
| Sep 22 | 64°C | 57°C | 54°C | 59°C |
| Sep 23 | 64°C | 59°C | 54°C | 59°C |
| Sep 24 | 63°C | 54°C | 54°C | 57°C |
| Sep 25 | 64°C | 54°C | 54°C | 58°C |
| Sep 26 | 63°C | 54°C | 61°C | 59°C |
| Sep 27 | 64°C | 61°C | 57°C | 60°C |
| Sep 28 | 63°C | 55°C | 57°C | 58°C |
| Sep 29 | 63°C | 57°C | 59°C | 59°C |
Portland Climate and Swimming Opportunities in September
61°F
Average Day Air Temperature
48°F
Average Night Air Temperature
3 in
Precipitation Amount per Month
16 days
Number of Rainy Days
13 hrs
Daylight
per Day
4 hrs
Sunshine
per Day
11 mph
Average Wind Speed
88%
Average
humidity
Portland lies within the Maine in United States. The average daytime temperature in Portland in September is 61°F (16°C), while the nighttime average is 49°F (9°C). There are typically 16 rainy days during the month, with a total precipitation of 3.1 inches (78 mm). The daylight duration in September in Portland is 13 hours, with an average of 4 hours of sunshine per day. The average wind speed in September is 11 mph (18 km/h), and the humidity level is around 88%.
The water temperature in Portland in September ranges from 55°F to 61°F (13°C to 16°C). At the beginning of the month, the average temperature is around 61°F (16°C), shifting to 59°F (15°C) by mid-September and reaching 59°F (15°C) in the last ten days. Overall, the average sea temperature in Portland for September is 59°F (15°C). Ideal conditions for a refreshing swim, though some may still find it a bit cool.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in Portland
What is the sea temperature in Portland in September?
The water temperature in the Atlantic Ocean in Portland in September ranges from 55°F to 61°F (13°C to 16°C).
Is it possible to swim in the Atlantic Ocean in Portland in September?
The average sea temperature in Portland in September is 59°F (15°C), and the air temperature is 61°F (16°C), so ideal conditions for a refreshing swim, though some may still find it a bit cool.