Portland — Water Temperature in October

Water Temperature Range

21°C

minimum

26°C

average

31°C

maximum

Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

Water Temperature Chart for Month

The chart shows the average daily water temperature for each day of the month based on historical data.

Table of Water Temperatures by Day of the Month for Previous Years

Day	2026	2025	2024	2023
OCT 1	-10°C	30°C	29°C	29°C
OCT 2	30°C	28°C	28°C	28°C
OCT 3	30°C	28°C	28°C	29°C
OCT 4	30°C	28°C	28°C	29°C
OCT 5	30°C	28°C	28°C	30°C
OCT 6	29°C	28°C	28°C	29°C
OCT 7	29°C	28°C	28°C	29°C
OCT 8	29°C	28°C	28°C	29°C
OCT 9	29°C	28°C	27°C	29°C
OCT 10	29°C	27°C	28°C	29°C
OCT 11	29°C	27°C	28°C	29°C
OCT 12	29°C	28°C	29°C	29°C
OCT 13	29°C	27°C	28°C	29°C
OCT 14	29°C	27°C	28°C	29°C
OCT 15	29°C	27°C	27°C	29°C
OCT 16	29°C	26°C	28°C	27°C
OCT 17	29°C	26°C	29°C	26°C
OCT 18	27°C	25°C	27°C	25°C
OCT 19	26°C	25°C	27°C	26°C
OCT 20	26°C	26°C	27°C	27°C
OCT 21	26°C	26°C	27°C	27°C
OCT 22	26°C	25°C	27°C	28°C
OCT 23	25°C	25°C	27°C	26°C
OCT 24	26°C	25°C	28°C	27°C
OCT 25	25°C	25°C	27°C	27°C
OCT 26	26°C	25°C	27°C	28°C
OCT 27	25°C	25°C	26°C	28°C
OCT 28	25°C	24°C	27°C	25°C
OCT 29	25°C	24°C	26°C	24°C
OCT 30	26°C	23°C	25°C	23°C
OCT 31	26°C	23°C	26°C	24°C

October: Climate and Swimming Opportunities

Average Night Air Temperature

19°C

Average Day Air Temperature

28°C

Precipitation Amount per Month

89 mm

Number of Rainy Days

Daylight per Day

11 hrs

Sunshine per Day

7 hrs

Average Wind Speed

18 km/h

Average Humidity

75%

At such water and air temperatures, swimming feels truly comfortable and relaxing. The warm water won’t cool you down, so you can stay in for a long time without getting chilled.