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 18.55°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.

65.4

°F

July 11, 03:31

Trend:

increasing

Yesterday:

65.3°F

Tomorrow:

65.5°F

Sunrise:

05:10

Sunset:

21:20

Day Length:

16 h. 10 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 65.4°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 3.7°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 64.0°F on 2025, while the historical minimum was 59.6°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 65.8°F, with minimum temperature starting at 65.5°F, while the maximum might reach 66.1°F.

Daily water temperature in Portland

Date	Current Year actual* / forecast**	last year	10 years average
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	61.3°F
Jul 8	64.1°F	63.2°F	61.5°F
Jul 9	64.5°F	63.0°F	61.8°F
Jul 10	65.3°F	63.7°F	61.6°F
Jul 11	65.4°F	64.0°F	61.7°F
Jul 12	65.5°F	64.2°F	61.9°F
Jul 13	65.6°F	64.5°F	62.0°F
Jul 14	65.8°F	64.5°F	62.1°F
Jul 15	65.9°F	63.9°F	62.2°F
Jul 16	65.9°F	64.5°F	62.3°F
Jul 17	66.0°F	64.1°F	62.4°F
Jul 18	66.1°F	64.5°F	62.5°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.

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	69.6°F	62mi
Barry	66.7°F	68mi
Cardiff	68.3°F	71mi
Cherbourg-Octeville	64.0°F	74mi

* current water temperature in this city

** straight line distance from Portland