Water temperature in San Jose (Costa Rica)

This data the coastal San Jose 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 San Jose

Water temperature in San Jose today is 21°C. Based on our historical data over a period of ten years, the warmest water in this day in San Jose was, like today, 21°C, and the coldest 20°C. Water temperature in San Jose is expected to drop to 20.4°C in the next 10 days. September average water temperature in San Jose is 20.5°C, the minimum temperature is 20°C, and the maximum is 22°C.

The swimming season in San Jose lasts from April to October. During those months, San Jose water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in San Jose in winter reaches 20.1°C, in spring 21.1°C, in summer the average temperature rises to 20.6°C, and in autumn it is 20.2°C.

San Jose water temperature now

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
16.1°C	15.8°C	16.7°C	23.5°C

12-15 h	15-18 h	18-21 h	21-24 h
22°C	20.8°C	16.3°C	16.1°C

San Jose water temperature by month

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

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Our report for San Jose 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.