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

9°C

MINIMUN

11.5°C

AVERAGE

14°C

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	12°C	14°C	13°C	12.5°C
Oct 2	13°C	14°C	12°C	12.8°C
Oct 3	13°C	13°C	13°C	12.8°C
Oct 4	12°C	13°C	10°C	11.5°C
Oct 5	12°C	13°C	12°C	12.0°C
Oct 6	12°C	13°C	10°C	11.3°C
Oct 7	12°C	14°C	14°C	12.5°C
Oct 8	12°C	13°C	12°C	12.0°C
Oct 9	11°C	14°C	11°C	11.8°C
Oct 10	12°C	14°C	12°C	12.5°C
Oct 11	12°C	14°C	13°C	12.8°C
Oct 12	12°C	13°C	10°C	11.3°C
Oct 13	11°C	13°C	10°C	11.0°C
Oct 14	12°C	13°C	10°C	11.3°C
Oct 15	12°C	13°C	12°C	11.8°C
Oct 16	11°C	13°C	14°C	12.3°C
Oct 17	12°C	13°C	10°C	11.3°C
Oct 18	12°C	13°C	14°C	12.5°C
Oct 19	12°C	13°C	12°C	12.0°C
Oct 20	11°C	13°C	13°C	11.8°C
Oct 21	11°C	13°C	13°C	11.8°C
Oct 22	12°C	12°C	14°C	12.3°C
Oct 23	11°C	12°C	10°C	11.0°C
Oct 24	12°C	12°C	13°C	12.0°C
Oct 25	11°C	11°C	11°C	11.0°C
Oct 26	11°C	11°C	11°C	10.8°C
Oct 27	11°C	12°C	11°C	11.0°C
Oct 28	11°C	12°C	11°C	11.3°C
Oct 29	12°C	11°C	10°C	11.0°C
Oct 30	12°C	13°C	14°C	12.5°C

Seattle Climate and Swimming Opportunities in October

16°C

Average Day Air Temperature

7°C

Average Night Air Temperature

91 mm

Precipitation Amount per Month

13 days

Number of Rainy Days

11 hrs

Daylight
per Day

5 hrs

Sunshine
per Day

10 km/h

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.