Sea Temperature in Portland in October

Complete information on the sea temperature range in the Atlantic Ocean in Portland in October. Historical daily data. Climate details for October. 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 October

8°C

MINIMUN

12.5°C

AVERAGE

17°C

MAXIMUM

Historical Data of Water Temperature in October in Portland

Water Temperature Chart for Atlantic Ocean in Portland in October

Sea Temperature Table in Portland in October Over the Past Years

Day	2024	2023	2022	Average
Oct 1	16°C	13°C	13°C	14.0°C
Oct 2	16°C	12°C	12°C	13.5°C
Oct 3	16°C	12°C	12°C	13.5°C
Oct 4	15°C	12°C	12°C	13.3°C
Oct 5	16°C	12°C	12°C	13.5°C
Oct 6	16°C	12°C	12°C	13.5°C
Oct 7	16°C	12°C	12°C	13.5°C
Oct 8	15°C	11°C	11°C	12.8°C
Oct 9	16°C	11°C	11°C	13.3°C
Oct 10	16°C	11°C	11°C	13.0°C
Oct 11	15°C	11°C	11°C	12.8°C
Oct 12	15°C	11°C	11°C	12.8°C
Oct 13	16°C	11°C	11°C	13.0°C
Oct 14	16°C	10°C	10°C	12.8°C
Oct 15	16°C	10°C	10°C	12.3°C
Oct 16	16°C	10°C	10°C	12.3°C
Oct 17	16°C	10°C	10°C	12.3°C
Oct 18	15°C	10°C	10°C	11.8°C
Oct 19	14°C	10°C	10°C	11.3°C
Oct 20	14°C	9°C	9°C	10.8°C
Oct 21	15°C	9°C	9°C	11.3°C
Oct 22	14°C	9°C	9°C	11.0°C
Oct 23	14°C	9°C	9°C	11.0°C
Oct 24	14°C	9°C	9°C	11.0°C
Oct 25	13°C	9°C	9°C	10.8°C
Oct 26	13°C	8°C	8°C	10.3°C
Oct 27	12°C	8°C	8°C	10.0°C
Oct 28	12°C	8°C	8°C	10.0°C
Oct 29	13°C	8°C	8°C	9.8°C
Oct 30	13°C	8°C	8°C	10.0°C

Portland Climate and Swimming Opportunities in October

13°C

Average Day Air Temperature

7°C

Average Night Air Temperature

99 mm

Precipitation Amount per Month

18 days

Number of Rainy Days

10 hrs

Daylight
per Day

3 hrs

Sunshine
per Day

21 km/h

Average Wind Speed

90%

Average
humidity

Portland lies within the Maine in United States. The average daytime temperature in Portland in October is 56°F (13°C), while the nighttime average is 45°F (7°C). There are typically 18 rainy days during the month, with a total precipitation of 3.9 inches (99 mm). The daylight duration in October in Portland is 10 hours, with an average of 3 hours of sunshine per day. The average wind speed in October is 13 mph (21 km/h), and the humidity level is around 90%.

The water temperature in Portland in October ranges from 48°F to 57°F (9°C to 14°C). At the beginning of the month, the average temperature is around 57°F (14°C), shifting to 55°F (13°C) by mid-October and reaching 52°F (11°C) in the last ten days. Overall, the average sea temperature in Portland for October is 54°F (12°C). The water is cool, but many swimmers can tolerate it, especially with the sun out. Acclimatization is helpful.

Sea Temperature in October in Nearby Cities

Frequently Asked Questions About Water Temperatures in October in Portland

What is the sea temperature in Portland in October?

The water temperature in the Atlantic Ocean in Portland in October ranges from 48°F to 57°F (9°C to 14°C).

Is it possible to swim in the Atlantic Ocean in Portland in October?

The average sea temperature in Portland in October is 54°F (12°C), and the air temperature is 56°F (13°C), so the water is cool, but many swimmers can tolerate it, especially with the sun out. Acclimatization is helpful.