Swimming in Rhode Island in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Rhode Island in september 2025.
In september, according to seasonal norms, the sea temperature in Rhode Island is:
Minimum: 65°F
Average: 67°F
Maximum: 70°F
Other useful seasonal weather averages in september:
- Outside temperature: 63°F to 74°F
- Most common weather: "Clear/Sunny"
- The wind blows at 10.6mph
- It rains a total of 2.8in, over 4 day(s).
Should we swim in Rhode Island in september?
Yes... and no. The water temperature in Rhode Island in september is cool
Swimming in september on the beaches of Rhode Island is possible but the sea water is cool. So even though the sea temperature sometimes climbs to 70°F, it can also be as low as 65°F! Note that the average is 67°F.
Note also that in september, the climate is perfect with an average outside temperature of 69°F, 2.8in of precipitation (over 4 days) and 84.3 % humidity.
Water and normal seasonal temperatures in Rhode Island in september
| September | |||
| Average sea temperature | 67°F | ||
| Minimum sea temperature | 65°F | ||
| Maximum sea temperature | 70°F | ||
| Average outside temperature | 70°F | ||
| Maximum outside temperature | 76°F | ||
| Minimum outside temperature | 63°F | ||
| Wind speed | 10.6mph | ||
| Wind temperature | 63°F | ||
| Precipitation | 2.8in | ||
| Number of days of rain | 4 jour(s) (12%) | ||
| Humidity | 85% | ||
| Visibility in kilometers | 9.07km | ||
| Cloud cover | 34% | ||
| Our opinion | cool swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Rhode Island
Swim elsewhere in the United States (USA) in september
Swim in the United States (USA) in september: sea temperature by city