World sea water temperatures

Grand Isle (VT) water temp

This data the coastal Grand Isle 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 Isle

Water temperature in Grand Isle today is 70.5°F. Based on our historical data over a period of ten years, the warmest water in this day in Grand Isle was recorded in 2015 and was 73.9°F, and the coldest was recorded in 2017 at 67.1°F. Water temperature in Grand Isle is expected to drop to 68.9°F in the next 10 days. September average water temperature in Grand Isle is 68.7°F, the minimum temperature is 61.5°F, and the maximum is 75.7°F.

The swimming season in Grand Isle lasts from July to September. During those months, Grand Isle water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Grand Isle in winter reaches 37.9°F, in spring 41°F, in summer the average temperature rises to 69.8°F, and in autumn it is 59.7°F.

Grand Isle water temperature now


September 5, 2025
today temp
70.5°F
September 4, 2025
yesterday temp
71.6°F


Current temperature and weather

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

0-3 h3-6 h6-9 h9-12 h
62.6°F59.2°F55.4°F60.1°F
12-15 h15-18 h18-21 h21-24 h
72.3°F75.9°F75.7°F72.3°F

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

Grand Isle water temperature by month

These figures shows the average, minimum and maximum monthly water temperature in Grand Isle. 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 Isle 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
January37.4°F33.6°F42.3°Fcold
Water temperature in Grand Isle in January
February33.8°F31.1°F37.6°Fcold
Water temperature in Grand Isle in February
March33.3°F30.9°F39.4°Fcold
Water temperature in Grand Isle in March
April38.8°F32.5°F46.4°Fcold
Water temperature in Grand Isle in April
May51.1°F40.6°F62.8°Fcold
Water temperature in Grand Isle in May
June63.1°F53.6°F77.2°Fcold
Water temperature in Grand Isle in June
July72.7°F64.8°F77.7°Fwarm
Water temperature in Grand Isle in July
August73.8°F69.6°F78.8°Fwarm
Water temperature in Grand Isle in August
September68.7°F61.5°F75.7°Fwarm
Water temperature in Grand Isle in September
October59.7°F52.5°F67.6°Fcold
Water temperature in Grand Isle in October
November50.9°F44.1°F57.7°Fcold
Water temperature in Grand Isle in November
December42.8°F37.2°F48.6°Fcold
Water temperature in Grand Isle in December

Chart monthly average water temperature in Grand Isle

Water temperature in Grand Isle

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 60°F
 Average temperature  Maximum temperature

Nearby beaches and cities

The nearest beaches and cities from Grand Isle 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
Swanton70.9°F77°F 
Alexandria Bay68.4°F75.2°F1' 1"
Clayton68.9°F75.2°F1' 1"
Gananoque69.1°F75.2°F1' 1"
Dexter68.9°F77°F1' 2"
Henderson Harbor69.3°F73.4°F1' 2"
Pillar Point69.3°F73.4°F1' 2"
Sackets Harbor69.3°F73.4°F1' 2"
Southwick Beach69.3°F77°F1' 1"
Kingston68.7°F71.6°F1' 0"

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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 Isle 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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