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Portsmouth
Water Temperature in the Atlantic Ocean in Portsmouth, Virginia: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in Portsmouth in Virginia, 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 Portsmouth
41°F
TODAY
42°F
YESTERDAY
42°F
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Atlantic Ocean in Portsmouth is 5.5°F. This water temperature is still quite low, and swimming in such conditions may only be comfortable for hardened individuals. It is recommended to limit the time spent in the water to avoid hypothermia. For those not accustomed to cold water, it is better to refrain from swimming. However, if you decide to enter the water, it is advisable to wear a warm wetsuit for protection against the cold.
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 Portsmouth Over the Last 30 Days
The water temperature in Portsmouth 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 Portsmouth will rise slightly in the coming days and reach 44°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 Portsmouth 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 |
---|---|---|---|
Feb 15 | 42°F | 45°F | |
Feb 16 | 42°F | 44°F | |
Feb 17 | 42°F | 46°F | |
Feb 18 | 43°F | 44°F | |
Feb 19 | 43°F | 44°F | |
Feb 20 | 42°F | 45°F | |
Feb 21 | 42°F | 45°F | |
Feb 22 | 41°F | 45°F | |
Feb 23 | 46 | 42°F | |
Feb 24 | 46 | 42°F | |
Feb 25 | 46 | 42°F | |
Feb 26 | 46 | 43°F | |
Feb 27 | 47 | 43°F | |
Feb 28 | 47 | 44°F | |
Mar 1 | 46 | 44°F | |
Mar 2 | 46 | 44°F |
Sea Temperature in Portsmouth Throughout the Year
Throughout the year, the sea temperature in Portsmouth exceeds 77°F (25°C) for 76 days, exceeds 72°F (22°C) for 133 days, and exceeds 64°F (18°C) for 169 days.
Below is the annual chart of sea temperature changes in the Atlantic Ocean in Portsmouth.
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January
Minimum | Average | Maximum |
---|---|---|
41°F | 47°F | 54°F |
February
Minimum | Average | Maximum |
---|---|---|
39°F | 46°F | 54°F |
March
Minimum | Average | Maximum |
---|---|---|
43°F | 50°F | 57°F |
April
Minimum | Average | Maximum |
---|---|---|
48°F | 55°F | 63°F |
May
Minimum | Average | Maximum |
---|---|---|
55°F | 64°F | 72°F |
June
Minimum | Average | Maximum |
---|---|---|
63°F | 73°F | 82°F |
July
Minimum | Average | Maximum |
---|---|---|
73°F | 81°F | 88°F |
August
Minimum | Average | Maximum |
---|---|---|
73°F | 80°F | 86°F |
September
Minimum | Average | Maximum |
---|---|---|
72°F | 78°F | 84°F |
October
Minimum | Average | Maximum |
---|---|---|
61°F | 69°F | 77°F |
November
Minimum | Average | Maximum |
---|---|---|
54°F | 61°F | 68°F |
December
Minimum | Average | Maximum |
---|---|---|
43°F | 51°F | 59°F |
Monthly Water Temperature Histogram for Atlantic Ocean in Portsmouth
You can explore detailed data on how the water temperature in Portsmouth varies each month:
Portsmouth Weather
FEBRUARY 23
37°F / 54°F
clear skyhumidity: 71% | wind: 1 mph
FEBRUARY 24
43°F / 61°F
clear skyhumidity: 70% | wind: 2 mph
FEBRUARY 25
45°F / 63°F
clear skyhumidity: 67% | wind: 2 mph
FEBRUARY 26
50°F / 59°F
overcast clouds: 85-100%humidity: 70% | wind: 2 mph
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
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Sea Temperature in the Atlantic Ocean in Portsmouth: General Trends and Swimming Opportunities
The coastal region of Virginia, United States, experiences a humid subtropical climate with hot, humid summers and mild to cool winters. It receives moderate precipitation spread throughout the year, with potential for heavier rainfall during hurricane season.
Portsmouth is located in North America in the Northern Hemisphere at a latitude of 37 degrees, along the shores of the Atlantic Ocean. Portsmouth lies within the Virginia in United States.
The average annual daytime air temperature in Portsmouth is 64°F (18°C), with the average nighttime temperature being 52°F (11°C). The highest average daily temperature occurs in July, reaching 85°F (29°C), while the lowest is in January at 42°F (6°C). As for nighttime temperatures, the minimum average temperature of 33°F (1°C) is recorded in January, and the maximum is in July, reaching 71°F (22°C).
According to historical data, Portsmouth experiences 117 rainy days per year, which accounts for 32 percent of all days in the year. On average, there are 10 rainy days each month. The wettest month is May, with 10 rainy days and 3.6 inches (90 mm) of precipitation, while the driest month is October, which typically has 8 rainy days and only 3.3 inches (84 mm) of precipitation.
The average annual water temperature in Atlantic Ocean in Portsmouth is 63°F (17°C). In February, the water reaches its lowest point of the year at 39°F (4°C), while in July, it peaks at 88°F (31°C). The months suitable for comfortable beach vacations and swimming in the Atlantic Ocean are July, August, and September. During this period, the water temperature stays above 68°F (20°C) and can reach up to 88°F (31°C) on some days.
Geographical Location of Portsmouth
Nearby Cities
Frequently Asked Questions About Portsmouth and its Water Temperatures
What is the current sea temperature in Portsmouth?
The water temperature today in the Atlantic Ocean in Portsmouth is 41°F (5.1°C).
In which months is the water temperature in Portsmouth comfortable for swimming?
The water temperature in the Atlantic Ocean in Portsmouth is comfortable for swimming and beach vacations in July, August, and September.
What is the water temperature in Portsmouth during the winter?
The water temperature in the Atlantic Ocean in Portsmouth during the winter ranges from 39°F to 59°F (4°C to 15°C).
What is the water temperature in Portsmouth during the spring?
The water temperature in the Atlantic Ocean in Portsmouth during the spring ranges from 43°F to 72°F (6°C to 22°C).
What is the water temperature in Portsmouth during the summer?
The water temperature in the Atlantic Ocean in Portsmouth during the summer ranges from 63°F to 88°F (17°C to 31°C).
What is the water temperature in Portsmouth during the fall?
The water temperature in the Atlantic Ocean in Portsmouth during the fall ranges from 54°F to 84°F (12°C to 29°C).
Is it possible to swim in the sea in Portsmouth at any time of the year?
The Atlantic Ocean in Portsmouth is quite cool, and swimming is only possible in May, June, July, August, September, and October when the water temperature reaches 70°F (21°C).
Is Portsmouth a popular tourist destination for beach vacations?
Portsmouth has a moderate level of popularity for beach vacations; while it does receive some visitors, it is not among the top seaside destinations, as other locations may offer more favorable conditions.
What sea temperatures can I expect in Portsmouth in the next month?
In March, the water temperature in the Atlantic Ocean in Portsmouth will range between 43°F (6°C) and 57°F (14°C)