Sand Harbor water temp

This data the coastal Sand Harbor 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 water temperature in Sand Harbor

Water temperature in Sand Harbor today is 64.6°F. Based on our historical data over a period of ten years, the warmest water in this day in Sand Harbor was recorded in 2022 and was 65.3°F, and the coldest was recorded in 2013 at 59.9°F. Water temperature in Sand Harbor is expected to drop to 60.8°F in the next 10 days. September average water temperature in Sand Harbor is 65.1°F, the minimum temperature is 59°F, and the maximum is 71.4°F.

The swimming season in Sand Harbor lasts from July to August. During those months, Sand Harbor water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Sand Harbor in winter reaches 43.7°F, in spring 45.9°F, in summer the average temperature rises to 64°F, and in autumn it is 58.6°F.

Sand Harbor water temperature now

Surf Forecast in Sand 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 Sand 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 Sand Harbor. Data in table shown for September 26, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Sand Harbor

Sand Harbor weather forecast

Current temperature and weather

Data in a table show Sand Harbor temperature today (September 26, 2025). For more information and forecast for a few days, go to the weather forecast Sand Harbor.

0-3 h	3-6 h	6-9 h	9-12 h
54.5°F	50.5°F	46.9°F	64.2°F

12-15 h	15-18 h	18-21 h	21-24 h
73.2°F	78.3°F	70°F	57.9°F

Sand Harbor water temperature by month

These figures shows the average, minimum and maximum monthly water temperature in Sand 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 Sand 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 Sand Harbor

The nearest beaches and cities from Sand 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
Crystal Bay	64.8°F	78.8°F		0' 2"
Meeks Bay	64.2°F	73.4°F		0' 2"
Hercules	67.8°F	75.2°F		1' 5"
Pinole	67.8°F	75.2°F		1' 5"
Rodeo	67.8°F	75.2°F		1' 5"
Lakeport	74.7°F	91.4°F		6' 2"
Clear Lake	74.7°F	91.4°F		6' 2"
Montalvin	67.8°F	71.6°F		1' 5"
San Pablo Bay	67.8°F	71.6°F		1' 5"
China Camp	67.8°F	68°F		1' 5"

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Sand Harbor Beach

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Our report for Sand 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.