Swimming in San Juan in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in San Juan in september 2025.
In september, according to seasonal norms, the sea temperature in San Juan is:
Minimum: 84°F
Average: 85°F
Maximum: 87°F
Other useful seasonal weather averages in september:
- Outside temperature: 82°F to 86°F
- Most common weather: "Clear/Sunny"
- The wind blows at 17.4mph
- It rains a total of 4in, over 5 day(s).
Should we swim in San Juan in september?
Yes! The water temperature in San Juan in september is ideal
In september, swimming is ideal on the beaches around San Juan! With water reaching 87°F at most and 85°F on average, spending time in the water is very pleasant.
Note also that in september, the climate is good with an average outside temperature of 84°F, 4in of precipitation (over 5 days) and 80.17 % humidity.
Water and normal seasonal temperatures in San Juan in september
| September | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 84°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 83°F | ||
| Wind speed | 11.2mph | ||
| Wind temperature | 83°F | ||
| Precipitation | 4in | ||
| Number of days of rain | 5 jour(s) (17%) | ||
| Humidity | 81% | ||
| Visibility in kilometers | 9.72km | ||
| Cloud cover | 29% | ||
| Our opinion | ideal swimming |
Chart of the tides in september 2025
Tide times in september 2025 in San Juan
Swim elsewhere in Puerto Rico in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Mayagüez in september | 85°F | 87°F | ideal swimming | Vieques in september | 85°F | 87°F | ideal swimming |