Oak Harbor water temp

This data the coastal Oak Harbor ocean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current ocean temperature in Oak Harbor

Water temperature in Oak Harbor today is 56.5°F. Based on our historical data over a period of ten years, the warmest water in this day in Oak Harbor was recorded in 2022 and was 57.4°F, and the coldest was recorded in 2011 at 52°F. Sea water temperature in Oak Harbor is expected to drop to 54.7°F in the next 10 days. September average water temperature in Oak Harbor is 54.3°F, the minimum temperature is 50.4°F, and the maximum is 59.2°F.

Throughout the year, the water temperature in Oak Harbor does not rise above 68°F and therefore is not suitable for comfortable swimming. The average water temperature in Oak Harbor in winter reaches 46°F, in spring 48.4°F, in summer the average temperature rises to 54.5°F, and in autumn it is 51.6°F.

Oak Harbor water temperature now

The ocean salinity in Oak Harbor is 27.75‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Oak Harbor for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Oak Harbor. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Oak Harbor. Data in table shown for September 5, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Oak Harbor

Oak Harbor weather forecast

Current temperature and weather

Data in a table show Oak Harbor temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast Oak Harbor.

0-3 h	3-6 h	6-9 h	9-12 h
58.1°F	56.8°F	56.3°F	56.5°F

12-15 h	15-18 h	18-21 h	21-24 h
59.7°F	63°F	61°F	58.8°F

Oak Harbor water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Oak Harbor. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Oak Harbor on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Oak Harbor

The nearest beaches and cities from Oak Harbor with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Bowman Bay	57.9°F	62.6°F		0' 6"
Deception Pass	57.9°F	62.6°F		0' 6"
Lopez Island	54°F	55.4°F		0' 9"
Port Townsend	56.1°F	64.4°F		0' 7"
San Juan Islands	54.7°F	62.6°F		0' 9"
Discovery Bay	57.4°F	64.4°F		0' 7"
Olga	54.5°F	57.2°F		0' 4"
Warm Beach	62.6°F	78.8°F		0' 2"
Langley	61.3°F	75.2°F		0' 2"
Sequim	57.6°F	64.4°F		0' 8"

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Our report for Oak Harbor is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.