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Sea Temperature in Birch Bay in September

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

8°C

MINIMUN

12°C

AVERAGE

16°C

MAXIMUM

Historical Data of Water Temperature in September in Birch Bay

Water Temperature Chart for Salish Sea in Birch Bay in September

Sea Temperature Table in Birch Bay in September Over the Past Years

Day202420232022Average
Sep 114°C13°C12°C13.0°C
Sep 214°C13°C13°C13.5°C
Sep 314°C13°C13°C13.3°C
Sep 413°C13°C13°C13.0°C
Sep 513°C13°C13°C13.0°C
Sep 614°C13°C13°C13.5°C
Sep 715°C13°C13°C13.5°C
Sep 813°C13°C13°C13.3°C
Sep 914°C14°C13°C13.5°C
Sep 1014°C13°C13°C13.3°C
Sep 1113°C13°C13°C12.8°C
Sep 1214°C13°C13°C13.5°C
Sep 1314°C13°C13°C13.0°C
Sep 1413°C13°C13°C13.0°C
Sep 1513°C13°C13°C12.8°C
Sep 1613°C13°C13°C12.8°C
Sep 1712°C12°C13°C12.3°C
Sep 1813°C13°C12°C12.5°C
Sep 1913°C13°C12°C12.3°C
Sep 2013°C12°C12°C12.3°C
Sep 2113°C12°C12°C12.0°C
Sep 2213°C13°C12°C12.3°C
Sep 2313°C12°C12°C12.0°C
Sep 2413°C13°C12°C12.5°C
Sep 2514°C12°C12°C12.5°C
Sep 2613°C13°C12°C12.3°C
Sep 2713°C12°C13°C12.3°C
Sep 2813°C12°C13°C12.0°C
Sep 2913°C12°C12°C12.0°C
Washington, United StatesWashington, United StatesWashington, United States

Birch Bay Climate and Swimming Opportunities in September

19°C

Average Day Air Temperature

11°C

Average Night Air Temperature

70 mm

Precipitation Amount per Month

10 days

Number of Rainy Days

12 hrs

Daylight
per Day

6 hrs

Sunshine
per Day

9 km/h

Average Wind Speed

80%

Average
humidity

Birch Bay lies within the Washington in United States. The average daytime temperature in Birch Bay in September is 66°F (19°C), while the nighttime average is 51°F (11°C). There are typically 10 rainy days during the month, with a total precipitation of 2.8 inches (70 mm). The daylight duration in September in Birch Bay is 12 hours, with an average of 6 hours of sunshine per day. The average wind speed in September is 6 mph (9 km/h), and the humidity level is around 80%.

The water temperature in Birch Bay in September ranges from 54°F to 55°F (12°C to 13°C). At the beginning of the month, the average temperature is around 55°F (13°C), shifting to 55°F (13°C) by mid-September and reaching 54°F (12°C) in the last ten days. Overall, the average sea temperature in Birch Bay for September is 55°F (13°C). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Frequently Asked Questions About Water Temperatures in September in Birch Bay

What is the sea temperature in Birch Bay in September?

The water temperature in the Salish Sea in Birch Bay in September ranges from 54°F to 55°F (12°C to 13°C).

Is it possible to swim in the Salish Sea in Birch Bay in September?

The average sea temperature in Birch Bay in September is 55°F (13°C), and the air temperature is 66°F (19°C), so ideal conditions for a refreshing swim, though some may still find it a bit cool.