Grand Mere water temp

This data the coastal Grand Mere 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 Grand Mere

Water temperature in Grand Mere today is 70.9°F. Based on our historical data over a period of ten years, the warmest water in this day in Grand Mere was recorded in 2018 and was 75.2°F, and the coldest was recorded in 2017 at 65.8°F. Water temperature in Grand Mere is expected to drop to 69.4°F in the next 10 days. September average water temperature in Grand Mere is 68.9°F, the minimum temperature is 59.9°F, and the maximum is 75.4°F.

The swimming season in Grand Mere lasts from July to September. During those months, Grand Mere water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Grand Mere in winter reaches 38.3°F, in spring 43.5°F, in summer the average temperature rises to 69.8°F, and in autumn it is 59.9°F.

Grand Mere water temperature now

Surf Forecast in Grand Mere 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 Grand Mere. 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 Grand Mere. Data in table shown for September 6, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Grand Mere

Grand Mere weather forecast

Current temperature and weather

Data in a table show Grand Mere temperature today (September 6, 2025). For more information and forecast for a few days, go to the weather forecast Grand Mere.

0-3 h	3-6 h	6-9 h	9-12 h
61.9°F	62.2°F	64.9°F	64.4°F

12-15 h	15-18 h	18-21 h	21-24 h
61.2°F	61°F	63.3°F	63.1°F

Grand Mere water temperature by month

These figures shows the average, minimum and maximum monthly water temperature in Grand Mere. 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 Grand Mere 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 Grand Mere

The nearest beaches and cities from Grand Mere 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
New Buffalo	71.2°F	64.4°F		2' 7"
Washington Park Beach	69.6°F	64.4°F		2' 3"
Van Buren State Park	70.2°F	60.8°F		3' 5"
Michigan City	68.7°F	64.4°F		2' 3"
South Haven	70.2°F	60.8°F		3' 3"
Beverly Shores	69.3°F	64.4°F		2' 3"
Indiana Dunes	69.1°F	66.2°F		2' 2"
Porter Beach	69.1°F	66.2°F		2' 2"
Chesterton	69.3°F	66.2°F		2' 2"
Dune Acres	69.3°F	66.2°F		2' 2"

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Grand Mere State Park

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Our report for Grand Mere 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.