World sea water temperatures

Water temperature in Grand Case

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This data the coastal Grand Case sea 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 sea temperature in Grand Case

Water temperature in Grand Case today is 29.7°C. Based on our historical data over a period of ten years, the warmest water in this day in the Caribbean Sea near Grand Case was recorded in 2024 and was 29.9°C, and the coldest was recorded in 2018 at 28.3°C. Sea water temperature in Grand Case is expected to drop to 29.2°C in the next 10 days. September average water temperature in Grand Case is 29.1°C, the minimum temperature is 27.8°C, and the maximum is 30.8°C.

The swimming season in Grand Case lasts from January to December, twelve months per year! During those months, Grand Case water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Grand Case in winter reaches 26.8°C, in spring 26.9°C, in summer the average temperature rises to 28.5°C, and in autumn it is 28.9°C.

Grand Case water temperature now


5 September 2025
today temp
29.7°C
4 September 2025
yesterday temp
29.7°C


The sea salinity in Grand Case is 36.45‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Grand Case 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 Case. 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 Case. Data in table shown for 5 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

0-3 h3-6 h6-9 h9-12 h
2' 10"2' 11"2' 11"2' 11"
0.86 m0.88 m0.9 m0.88 m
12-15 h15-18 h18-21 h21-24 h
3' 3"3' 2"3' 2"3' 2"
0.98 m0.96 m0.96 m0.96 m

Surf report in Grand Case

Grand Case wave height and direction

Grand Case weather forecast

Grand Case wind speed and direction

Current temperature and weather

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

0-3 h3-6 h6-9 h9-12 h
28.8°C28.6°C28.5°C28.6°C
12-15 h15-18 h18-21 h21-24 h
28.8°C28.9°C29°C29°C

You may also be interested in other sections of our site for Grand Case: Sunrise and Sunset, Tides

Grand Case water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Grand Case. 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 Case 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

MonthAvrMinMax
January26.6°C25.6°C27.8°Chot
Sea water temperature in Grand Case in January
February26.2°C25.3°C27.2°Chot
Sea water temperature in Grand Case in February
March26.3°C25°C27.8°Chot
Sea water temperature in Grand Case in March
April26.8°C25.2°C28.3°Chot
Sea water temperature in Grand Case in April
May27.5°C26.3°C29.4°Chot
Sea water temperature in Grand Case in May
June28.2°C26.8°C29.7°Chot
Sea water temperature in Grand Case in June
July28.4°C27.1°C29.6°Chot
Sea water temperature in Grand Case in July
August28.9°C27.5°C30.3°Chot
Sea water temperature in Grand Case in August
September29.1°C27.8°C30.8°Chot
Sea water temperature in Grand Case in September
October29.1°C28.2°C30.8°Chot
Sea water temperature in Grand Case in October
November28.4°C27.2°C29.7°Chot
Sea water temperature in Grand Case in November
December27.5°C26.1°C28.9°Chot
Sea water temperature in Grand Case in December

Chart monthly average water temperature in Grand Case

Water temperature in Grand Case

Where is the warmest sea water in the world?

If you want to plan a vacation on the beach and enjoy the warm sea, choose the day of the year, region and the minimum comfortable sea/ocean temperature that interests you. As a result, you will get a list of countries and cities in which the average sea temperature or maximum temperature on this day over the past 10 years exceeds your chosen value

Region
Date (day and month)
Water temperature: min 16°C
 Average temperature  Maximum temperature

Nearby beaches and cities

The nearest beaches and cities from Grand Case 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

WaterWeatherWave
Orient Beach29.7°C29°C0.92 m
Cul-de-Sac29.7°C29°C0.92 m
Tintamarre Island29.7°C29°C1.08 m
Anse Marcel29.8°C29°C0.92 m
Sandy Ground29.7°C29°C0.88 m
Mullet Bay29.7°C29°C0.88 m
Sandy Ground29.8°C29°C0.83 m
Rendezvous Bay29.8°C29°C0.83 m
Meads Bay Beach29.8°C29°C0.83 m
The Valley29.8°C29°C0.83 m

Grand Case photo gallery

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Grand Case 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.

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