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Oak Harbor Sea Temperature in August

Washington, United States

July Oak Harbor year-round → September

Average sea temperature for Oak Harbor, United States across August, based on 10 years of daily readings.

Average

11.82° C

High

15.28° C

Low

9.93° C

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a real risk.

August is the 1st warmest of 12 months at Oak Harbor. On average the water sits 2.0° than the year-round mean of 9.78° C.

Compared to July, August is 0.5° warmer than (11.36° C in July). By September the water is usually 11.32° C.

Oak Harbor Day-by-Day Water Temperature in August

10-year low, average and high

9.0° C
10.9° C
12.8° C
14.6° C
16.5° C
1
5
10
15
20
25
31
Day-by-day low and high band with the 10-year daily average through August. Range Average

Each vertical bar above is one day of August. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at Oak Harbor.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

August Water Temperature Table for Oak Harbor

10-year daily averages

Day Average Low High
August 1 11.82° C 10.75° C 14.38° C
August 2 11.78° C 10.66° C 13.18° C
August 3 11.75° C 10.65° C 12.73° C
August 4 11.73° C 10.64° C 13.02° C
August 5 11.54° C 10.47° C 12.84° C
August 6 11.4° C 10.36° C 12.41° C
August 7 11.38° C 10.32° C 12.34° C
August 8 11.38° C 10.37° C 12.66° C
August 9 11.4° C 10.57° C 12.56° C
August 10 11.63° C 10.91° C 12.56° C
August 11 11.69° C 10.84° C 13.35° C
August 12 11.75° C 10.72° C 14.11° C
August 13 11.99° C 10.82° C 14.37° C
August 14 12.25° C 11.08° C 14.1° C
August 15 12.36° C 10.87° C 15.03° C
August 16 12.34° C 10.78° C 15.28° C
August 17 12.36° C 11.16° C 14.81° C
August 18 12.22° C 11.22° C 13.9° C
August 19 12.1° C 10.84° C 13.28° C
August 20 11.87° C 10.38° C 12.96° C
August 21 11.73° C 10.31° C 12.48° C
August 22 11.71° C 10.26° C 12.66° C
August 23 11.62° C 10.04° C 12.59° C
August 24 11.54° C 9.93° C 12.45° C
August 25 11.77° C 10.17° C 13.05° C
August 26 11.84° C 10.46° C 12.79° C
August 27 11.86° C 10.47° C 12.81° C
August 28 11.99° C 10.69° C 12.84° C
August 29 11.91° C 10.91° C 12.86° C
August 30 11.78° C 11.03° C 12.64° C
August 31 11.8° C 11.19° C 13.34° C

Where August Sits in the Year

August highlighted

6.0° C
8.6° C
11.3° C
13.9° C
16.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
8.33° C
8.07° C
8.19° C
8.97° C
9.97° C
10.61° C
11.36° C
11.82° C
11.32° C
10.28° C
9.56° C
8.85° C
10-year monthly history for Oak Harbor. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in August

Compare other United States water for the same month

Oak Harbor Location

48.2883, -122.6484

48.28829, -122.64842 View on OpenStreetMap →

Oak Harbor sits at 48.2883°N, 122.6484°W, on the coast of Washington, United States. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to Oak Harbor