Greencastle water temp

This data the coastal Greencastle 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 Greencastle

Water temperature in Greencastle today is 68°F. Based on our historical data over a period of ten years, the warmest water in this day in Greencastle was recorded in 2023 and was 69.8°F, and the coldest was recorded in 2022 at 64.4°F. Water temperature in Greencastle is expected to drop to 62.6°F in the next 10 days. September average water temperature in Greencastle is 69.3°F, the minimum temperature is 59°F, and the maximum is 77°F.

The swimming season in Greencastle lasts from July to September. During those months, Greencastle water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Greencastle in winter reaches 39°F, in spring 52.9°F, in summer the average temperature rises to 73.2°F, and in autumn it is 58.1°F.

Greencastle water temperature now

Current temperature and weather

Data in a table show Greencastle temperature today (September 27, 2025). For more information and forecast for a few days, go to the weather forecast Greencastle.

0-3 h	3-6 h	6-9 h	9-12 h
61°F	57.6°F	54.7°F	55.6°F

12-15 h	15-18 h	18-21 h	21-24 h
71.1°F	77.2°F	77.2°F	67.6°F

Greencastle water temperature by month

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

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Our report for Greencastle 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.