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Portland
Water Temperature in the Atlantic Ocean in Portland, Maine: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in Portland in Maine, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Current Water Temperature in Portland
38°F
TODAY
38°F
YESTERDAY
37°F
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Atlantic Ocean in Portland is 3.2°F. Such water is extremely cold and not recommended for swimming without proper preparation. In these conditions, the risk of hypothermia is very high, and prolonged exposure to the water can be hazardous to your health. If you decide to swim, it is important to have the appropriate gear, such as a wetsuit. Typically, only experienced swimmers or those who practice winter swimming venture into such waters.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart for Atlantic Ocean in Portland Over the Last 30 Days
The water temperature in Portland today is lower than both a week ago and a month ago. Today's sea temperature is generally in line with historical values for this day.
According to our forecast, the sea temperature in Portland will remain nearly unchanged in the coming days, its value will be 39°F.
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts across United States to enhance accuracy.
Water temperature data for Portland and nearby towns and resorts is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| Mar 20 | 37°F | 39°F | |
| Mar 21 | 38°F | 37°F | |
| Mar 22 | 38°F | 38°F | |
| Mar 23 | 38°F | 39°F | |
| Mar 24 | 37°F | 37°F | |
| Mar 25 | 38°F | 37°F | |
| Mar 26 | 38°F | 37°F | |
| Mar 27 | 38°F | 38°F | |
| Mar 28 | 38°F | 38°F | |
| Mar 29 | 39°F | 38°F | |
| Mar 30 | 38°F | 38°F | |
| Mar 31 | 39°F | 38°F | |
| Apr 1 | 41°F | 38°F | |
| Apr 2 | 39°F | 38°F | |
| Apr 3 | 38°F | 38°F | |
| Apr 4 | 41°F | 39°F |
Sea Temperature in Portland Throughout the Year
Throughout the year, the sea temperature in Portland never exceeds 64°F (18°C).
Below is the annual chart of sea temperature changes in the Atlantic Ocean in Portland.
January
| Minimum | Average | Maximum |
|---|---|---|
| 36°F | 39°F | 43°F |
February
| Minimum | Average | Maximum |
|---|---|---|
| 34°F | 38°F | 43°F |
March
| Minimum | Average | Maximum |
|---|---|---|
| 34°F | 38°F | 43°F |
April
| Minimum | Average | Maximum |
|---|---|---|
| 36°F | 41°F | 46°F |
May
| Minimum | Average | Maximum |
|---|---|---|
| 39°F | 47°F | 55°F |
June
| Minimum | Average | Maximum |
|---|---|---|
| 46°F | 55°F | 63°F |
July
| Minimum | Average | Maximum |
|---|---|---|
| 54°F | 61°F | 68°F |
August
| Minimum | Average | Maximum |
|---|---|---|
| 55°F | 62°F | 68°F |
September
| Minimum | Average | Maximum |
|---|---|---|
| 54°F | 60°F | 66°F |
October
| Minimum | Average | Maximum |
|---|---|---|
| 46°F | 55°F | 63°F |
November
| Minimum | Average | Maximum |
|---|---|---|
| 45°F | 51°F | 57°F |
December
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 45°F | 52°F |
Monthly Water Temperature Histogram for Atlantic Ocean in Portland
You can explore detailed data on how the water temperature in Portland varies each month:
What Beaches Are There In and Around Portland?
East End Beach
East End Beach is a 3-stars sandy beach, is located directly in Portland. There is parking. There are restrooms. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Martin Point Trail
Martin Point Trail is a 2-stars sandy beach, located in a 2 km (1 miles) radius of Portland. There is parking.
Willard Beach
Willard Beach is a 5-stars sandy beach, located in a 3 km (2 miles) radius of Portland. There are lifeguards on the beach. There is parking. There are restrooms. There are cafés. Willard Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. Snorkeling is possible. It is suitable for surfing. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
West Shore Sandy Beach
West Shore Sandy Beach is a 2-stars sandy beach, located in a 3 km (2 miles) radius of Portland. There is parking.
Cliff House Beach
Cliff House Beach is a 2-stars pebble beach, located in a 4 km (2 miles) radius of Portland. There are cafés. Snorkeling is possible.
Fowler Beach
Fowler Beach is a 1-stars pebble beach, located in a 6 km (4 miles) radius of Portland. There is parking.
Robinson Woods Preserve
Robinson Woods Preserve is a 1-stars pebble beach, located in a 7 km (4 miles) radius of Portland. There is parking.
Andrews Beach
Andrews Beach is a 1-stars pebble beach, located in a 8 km (5 miles) radius of Portland.
Portland Weather
MARCH 28
30°F / 46°F
overcast clouds: 85-100%humidity: 78% | wind: 2 mph
MARCH 29
23°F / 34°F
snowhumidity: 93% | wind: 2 mph
MARCH 30
34°F / 37°F
light rainhumidity: 98% | wind: 2 mph
MARCH 31
39°F / 39°F
light rainhumidity: 99% | wind: 1 mph
Sea Temperature in the Atlantic Ocean in Portland: General Trends and Swimming Opportunities
The coastal region of Maine, United States, primarily experiences a humid continental climate characterized by cold, snowy winters and warm summers. However, due to its proximity to the Atlantic Ocean, the coastal area sees comparatively milder winters and cooler summers than the state's inland areas.
Portland is located in North America in the Northern Hemisphere at a latitude of 44 degrees, along the shores of the Atlantic Ocean. Portland lies within the Maine in United States.
The average annual daytime air temperature in Portland is 55°F (13°C), with the average nighttime temperature being 43°F (6°C). The highest average daily temperature occurs in July, reaching 65°F (18°C), while the lowest is in January at 46°F (8°C). As for nighttime temperatures, the minimum average temperature of 36°F (2°C) is recorded in February, and the maximum is in July, reaching 53°F (11°C).
According to historical data, Portland experiences 189 rainy days per year, which accounts for 52 percent of all days in the year. On average, there are 16 rainy days each month. The wettest month is January, with 18 rainy days and 3.4 inches (85 mm) of precipitation, while the driest month is April, which typically has 13 rainy days and only 2.4 inches (62 mm) of precipitation.
The average annual water temperature in Atlantic Ocean in Portland is 50°F (10°C). In February, the water reaches its lowest point of the year at 34°F (1°C), while in July, it peaks at 68°F (20°C). In Portland, the water temperature in the Atlantic Ocean never consistently reaches a comfortable level for swimming in any month.
Geographical Location of Portland
Nearby Cities
Frequently Asked Questions About Portland and its Water Temperatures
What is the current sea temperature in Portland?
The water temperature today in the Atlantic Ocean in Portland is 38°F (3.3°C).
In which months is the water temperature in Portland comfortable for swimming?
It cannot be guaranteed that the water temperature in Portland will be comfortable for swimming in any month of the year.
What is the water temperature in Portland during the winter?
The water temperature in the Atlantic Ocean in Portland during the winter ranges from 34°F to 52°F (1°C to 11°C).
What is the water temperature in Portland during the spring?
The water temperature in the Atlantic Ocean in Portland during the spring ranges from 34°F to 55°F (1°C to 13°C).
What is the water temperature in Portland during the summer?
The water temperature in the Atlantic Ocean in Portland during the summer ranges from 46°F to 68°F (8°C to 20°C).
What is the water temperature in Portland during the fall?
The water temperature in the Atlantic Ocean in Portland during the fall ranges from 45°F to 66°F (7°C to 19°C).
Is it possible to swim in the sea in Portland at any time of the year?
In Portland, the Atlantic Ocean is quite cold, and swimming is almost impossible as the water temperature never reaches 70°F (21°C).
Is Portland a popular tourist destination for beach vacations?
Portland a fairly popular beach destination, offering good conditions for swimming and relaxation, with a steady flow of tourists, especially during peak seasons.
What sea temperatures can I expect in Portland in the next month?
In April, the water temperature in the Atlantic Ocean in Portland will range between 36°F (2°C) and 46°F (8°C)