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 20.1°C. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

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.

68.2

°F

August 19, 12:38

Trend:

decreasing

Yesterday:

68.4°F

Tomorrow:

68.0°F

Sunrise:

06:03

Sunset:

20:23

Day Length:

14 h. 20 min.

Portland in August

Minimum:

47.9°F

Average:

50.2°F

Maximum:

52.1°F

Sea water temperature in Portland today

As of now, in Portland, the water temperature is 68.2°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 3.9°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 fall 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 65.9°F on 2022, while the historical minimum was 63.2°F on 2017.

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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 68.2°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Portland

Date	Current Year actual* / forecast**	last year	10 years average
Aug 5	67.6°F	64.9°F	64.2°F
Aug 6	67.1°F	64.4°F	64.1°F
Aug 7	66.8°F	64.4°F	64.1°F
Aug 8	66.9°F	64.2°F	64.2°F
Aug 9	67.0°F	64.2°F	64.3°F
Aug 10	67.1°F	64.4°F	64.4°F
Aug 11	67.2°F	64.3°F	64.4°F
Aug 12	67.8°F	65.4°F	64.7°F
Aug 13	67.8°F	65.6°F	64.7°F
Aug 14	68.0°F	65.6°F	64.7°F
Aug 15	68.3°F	65.7°F	64.8°F
Aug 16	67.6°F	65.6°F	64.8°F
Aug 17	67.2°F	65.7°F	64.7°F
Aug 18	68.4°F	65.3°F	64.9°F
Aug 19	68.2°F	65.1°F	64.3°F
Aug 20	68.0°F	65.1°F	64.1°F
Aug 21	68.2°F	65.4°F	64.3°F
Aug 22	68.3°F	65.4°F	64.4°F
Aug 23	68.2°F	65.3°F	64.3°F
Aug 24	68.2°F	65.4°F	64.3°F
Aug 25	68.2°F	65.8°F	64.3°F
Aug 26	68.4°F	66.3°F	64.5°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 August 18, 2026, reaching a 68.4°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, 61.7°F in Summer, and 60.3°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Bristol	68.2°F	62mi
Barry	69.9°F	68mi
Cardiff	70.5°F	71mi
Cherbourg-Octeville	67.7°F	74mi

* current water temperature in this city

** straight line distance from Portland