What is the current water temperature in Portland?

Q: What is the current water temperature in Portland?

As of now, in Portland, the water temperature is 17.59°C. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

United Kingdom > Portland

Water temperature in Portland

Detailed information about the current water temperature in Portland. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

63.7

°F

July 8, 01:19

Trend:

increasing

Yesterday:

63.4°F

Tomorrow:

63.9°F

Sunrise:

05:07

Sunset:

21:22

Day Length:

16 h. 15 min.

Portland in July

Minimum:

48.4°F

Average:

50.2°F

Maximum:

51.4°F

Sea water temperature in Portland today

As of now, in Portland, the water temperature is 63.7°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 2.4°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 63.2°F on 2025, while the historical minimum was 59.0°F on 2016.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 64.2°F, with minimum temperature starting at 63.9°F, while the maximum might reach 64.6°F.

Daily water temperature in Portland

Date	Current Year actual* / forecast**	last year	10 years average
Jun 24	61.5°F	61.5°F	59.7°F
Jun 25	61.8°F	61.1°F	60.0°F
Jun 26	62.9°F	60.8°F	60.3°F
Jun 27	63.4°F	61.1°F	60.3°F
Jun 28	63.6°F	62.2°F	60.5°F
Jun 29	63.0°F	62.2°F	60.4°F
Jun 30	62.8°F	62.9°F	60.6°F
Jul 1	62.3°F	62.9°F	60.7°F
Jul 2	62.7°F	62.4°F	60.8°F
Jul 3	62.6°F	62.9°F	60.9°F
Jul 4	63.3°F	62.5°F	61.0°F
Jul 5	63.2°F	62.5°F	61.0°F
Jul 6	63.1°F	62.6°F	61.2°F
Jul 7	63.4°F	62.9°F	61.1°F
Jul 8	63.7°F	63.2°F	61.3°F
Jul 9	63.9°F	63.0°F	61.5°F
Jul 10	64.0°F	63.7°F	61.6°F
Jul 11	64.1°F	64.0°F	61.7°F
Jul 12	64.2°F	64.2°F	61.9°F
Jul 13	64.4°F	64.5°F	62.0°F
Jul 14	64.5°F	64.5°F	62.1°F
Jul 15	64.6°F	63.9°F	62.2°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.

Sea water temperature in Portland by month

In an average year, Portland offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Portland was recorded on September 3, 2022, reaching a 67.0°F. While the coldest temperature occurred on March 5, 2018, dipping to 43.9°F. The average readings by season are 49.7°F in Winter, 50.5°F in Spring, 61.6°F in Summer, and 60.3°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Bristol	68.3°F	62mi
Barry	66.6°F	68mi
Cardiff	67.0°F	71mi
Cherbourg-Octeville	63.3°F	74mi

* current water temperature in this city

** straight line distance from Portland