Sea Temperature in Seattle in October

Complete information on the sea temperature range in the Salish Sea in Seattle in October. Historical daily data. Climate details for October. Tips on swimming conditions and beach relaxation in Seattle. 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 Seattle in October

48°F

MINIMUN

53°F

AVERAGE

57°F

MAXIMUM

Historical Data of Water Temperature in October in Seattle

Water Temperature Chart for Salish Sea in Seattle in October

Sea Temperature Table in Seattle in October Over the Past Years

Day	2024	2023	2022	Average
Oct 1	54°C	57°C	55°C	55°C
Oct 2	55°C	57°C	54°C	55°C
Oct 3	55°C	55°C	55°C	55°C
Oct 4	54°C	55°C	50°C	53°C
Oct 5	54°C	55°C	54°C	54°C
Oct 6	54°C	55°C	50°C	52°C
Oct 7	54°C	57°C	57°C	55°C
Oct 8	54°C	55°C	54°C	54°C
Oct 9	52°C	57°C	52°C	53°C
Oct 10	54°C	57°C	54°C	55°C
Oct 11	54°C	57°C	55°C	55°C
Oct 12	54°C	55°C	50°C	52°C
Oct 13	52°C	55°C	50°C	52°C
Oct 14	54°C	55°C	50°C	52°C
Oct 15	54°C	55°C	54°C	53°C
Oct 16	52°C	55°C	57°C	54°C
Oct 17	54°C	55°C	50°C	52°C
Oct 18	54°C	55°C	57°C	55°C
Oct 19	54°C	55°C	54°C	54°C
Oct 20	52°C	55°C	55°C	53°C
Oct 21	52°C	55°C	55°C	53°C
Oct 22	54°C	54°C	57°C	54°C
Oct 23	52°C	54°C	50°C	52°C
Oct 24	54°C	54°C	55°C	54°C
Oct 25	52°C	52°C	52°C	52°C
Oct 26	52°C	52°C	52°C	51°C
Oct 27	52°C	54°C	52°C	52°C
Oct 28	52°C	54°C	52°C	52°C
Oct 29	54°C	52°C	50°C	52°C
Oct 30	54°C	55°C	57°C	55°C

Seattle Climate and Swimming Opportunities in October

61°F

Average Day Air Temperature

45°F

Average Night Air Temperature

4 in

Precipitation Amount per Month

13 days

Number of Rainy Days

11 hrs

Daylight
per Day

5 hrs

Sunshine
per Day

6 mph

Average Wind Speed

80%

Average
humidity

Seattle lies within the Washington in United States. The average daytime temperature in Seattle in October is 61°F (16°C), while the nighttime average is 45°F (7°C). There are typically 13 rainy days during the month, with a total precipitation of 3.6 inches (91 mm). The daylight duration in October in Seattle is 11 hours, with an average of 5 hours of sunshine per day. The average wind speed in October is 6 mph (10 km/h), and the humidity level is around 80%.

The water temperature in Seattle in October ranges from 50°F to 54°F (10°C to 12°C). At the beginning of the month, the average temperature is around 54°F (12°C), shifting to 54°F (12°C) by mid-October and reaching 54°F (12°C) in the last ten days. Overall, the average sea temperature in Seattle for October is 54°F (12°C). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Sea Temperature in October in Nearby Cities

Frequently Asked Questions About Water Temperatures in October in Seattle

What is the sea temperature in Seattle in October?

The water temperature in the Salish Sea in Seattle in October ranges from 50°F to 54°F (10°C to 12°C).

Is it possible to swim in the Salish Sea in Seattle in October?

The average sea temperature in Seattle in October is 54°F (12°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.