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 14.07°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

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.

57.3

°F

June 19, 20:03

Trend:

stable

Yesterday:

58.0°F

Tomorrow:

57.5°F

Sunrise:

04:57

Sunset:

21:25

Day Length:

16 h. 28 min.

Portland in June

Minimum:

48.4°F

Average:

50.5°F

Maximum:

51.7°F

Sea water temperature in Portland today

As of now, in Portland, the water temperature is 57.3°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.4°F lower 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 considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 60.9°F on 2025, while the historical minimum was 56.4°F on 2021.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 58.0°F, with minimum temperature starting at 57.5°F, while the maximum might reach 58.7°F.

Daily water temperature in Portland

Date	Current Year actual* / forecast**	last year	10 years average
Jun 5	58.2°F	57.7°F	56.9°F
Jun 6	58.2°F	57.8°F	57.0°F
Jun 7	58.0°F	57.6°F	57.0°F
Jun 8	58.0°F	57.8°F	57.1°F
Jun 9	58.4°F	58.0°F	57.4°F
Jun 10	58.1°F	58.4°F	57.5°F
Jun 11	58.2°F	58.5°F	57.5°F
Jun 12	57.8°F	58.9°F	57.7°F
Jun 13	58.3°F	59.7°F	57.9°F
Jun 14	58.6°F	59.2°F	57.9°F
Jun 15	58.7°F	59.6°F	58.0°F
Jun 16	58.5°F	60.0°F	58.2°F
Jun 17	58.5°F	59.8°F	58.4°F
Jun 18	58.0°F	60.2°F	58.5°F
Jun 19	57.3°F	60.9°F	58.7°F
Jun 20	57.5°F	61.6°F	58.9°F
Jun 21	57.5°F	61.1°F	58.9°F
Jun 22	57.7°F	61.1°F	59.1°F
Jun 23	58.0°F	61.0°F	59.4°F
Jun 24	58.2°F	61.5°F	59.6°F
Jun 25	58.4°F	61.1°F	59.8°F
Jun 26	58.7°F	60.8°F	60.1°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	63.1°F	62mi
Barry	59.0°F	68mi
Cardiff	61.4°F	71mi
Cherbourg-Octeville	59.7°F	74mi

* current water temperature in this city

** straight line distance from Portland