Water temperature in Portland
65.3
°F
October 1, 20:04
Trend:
stableYesterday:
64.0°FTomorrow:
65.2°F
Sunrise:
Sunset:
Day Length:
11 h. 40 min.Portland in October
Minimum:
47.9°FAverage:
49.9°FMaximum:
51.5°FSea water temperature in Portland today
As of now, in Portland, the water temperature is 65.3°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 2.9°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a noticeable increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to stay about the same.Recent sea temperature and forecast
Today's reading indicates a minor change compared to the average water temperature of the last two weeks, but the overall trend remains steady. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 63.4°F on 2022, while the historical minimum was 61.6°F on 2025.
Daily water temperature in Portland
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Sep 17 | 65.9°F | 63.0°F | 63.9°F |
| Sep 18 | 65.7°F | 62.9°F | 64.0°F |
| Sep 19 | 65.2°F | 63.1°F | 63.8°F |
| Sep 20 | 65.0°F | 63.1°F | 63.8°F |
| Sep 21 | 65.3°F | 63.2°F | 63.8°F |
| Sep 22 | 65.6°F | 62.6°F | 63.6°F |
| Sep 23 | 65.7°F | 62.5°F | 63.5°F |
| Sep 24 | 65.6°F | 62.5°F | 63.4°F |
| Sep 25 | 65.5°F | 62.4°F | 63.4°F |
| Sep 26 | 65.5°F | 62.2°F | 63.4°F |
| Sep 27 | 64.8°F | 62.1°F | 63.2°F |
| Sep 28 | 64.9°F | 61.8°F | 63.0°F |
| Sep 29 | 64.8°F | 61.7°F | 62.9°F |
| Sep 30 | 64.0°F | 61.6°F | 62.7°F |
| Oct 1 | 65.3°F | 61.6°F | 62.5°F |
| Oct 2 | 65.2°F | 61.4°F | 62.4°F |
| Oct 3 | 65.1°F | 61.3°F | 62.2°F |
| Oct 4 | 65.0°F | 61.3°F | 62.2°F |
| Oct 5 | 64.7°F | 61.2°F | 61.8°F |
| Oct 6 | 64.6°F | 61.0°F | 61.7°F |
| Oct 7 | 64.4°F | 60.8°F | 61.6°F |
| Oct 8 | 64.4°F | 60.7°F | 61.5°F |
* actual - actual temperature values
** forecast - projected values for the next week
Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.
Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Bristol |
63.3°F
|
62mi |
| Barry |
64.3°F
|
68mi |
| Cardiff |
64.1°F
|
71mi |
| Cherbourg-Octeville |
66.1°F
|
74mi |
* current water temperature in this city
** straight line distance from Portland