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St. John's
© Les Dawe
Water Temperature in the Atlantic Ocean in St. John's, Newfoundland And Labrador: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in St. John's in Newfoundland And Labrador, 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 St. John's
35°F
TODAY
34°F
YESTERDAY
33°F
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Atlantic Ocean in St. John's is 1.2°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 St. John's Over the Last 30 Days
The water temperature in St. John's 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 St. John's will remain nearly unchanged in the coming days, its value will be 36°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 Canada to enhance accuracy.
Water temperature data for St. John's 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 |
|---|---|---|---|
| May 2 | 33°F | 33°F | |
| May 3 | 33°F | 34°F | |
| May 4 | 33°F | 34°F | |
| May 5 | 34°F | 33°F | |
| May 6 | 34°F | 34°F | |
| May 7 | 34°F | 35°F | |
| May 8 | 34°F | 35°F | |
| May 9 | 35°F | 35°F | |
| May 10 | 36°F | 35°F | |
| May 11 | 35°F | 35°F | |
| May 12 | 36°F | 35°F | |
| May 13 | 36°F | 35°F | |
| May 14 | 36°F | 35°F | |
| May 15 | 36°F | 35°F | |
| May 16 | 37°F | 36°F | |
| May 17 | 37°F | 36°F |
Sea Temperature in St. John's Throughout the Year
Throughout the year, the sea temperature in St. John's never exceeds 64°F (18°C).
Below is the annual chart of sea temperature changes in the Atlantic Ocean in St. John's.
January
| Minimum | Average | Maximum |
|---|---|---|
| 28°F | 33°F | 37°F |
February
| Minimum | Average | Maximum |
|---|---|---|
| 30°F | 33°F | 36°F |
March
| Minimum | Average | Maximum |
|---|---|---|
| 28°F | 31°F | 34°F |
April
| Minimum | Average | Maximum |
|---|---|---|
| 28°F | 32°F | 36°F |
May
| Minimum | Average | Maximum |
|---|---|---|
| 32°F | 37°F | 43°F |
June
| Minimum | Average | Maximum |
|---|---|---|
| 36°F | 44°F | 52°F |
July
| Minimum | Average | Maximum |
|---|---|---|
| 43°F | 51°F | 59°F |
August
| Minimum | Average | Maximum |
|---|---|---|
| 52°F | 57°F | 63°F |
September
| Minimum | Average | Maximum |
|---|---|---|
| 45°F | 54°F | 63°F |
October
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 47°F | 57°F |
November
| Minimum | Average | Maximum |
|---|---|---|
| 34°F | 43°F | 52°F |
December
| Minimum | Average | Maximum |
|---|---|---|
| 30°F | 37°F | 45°F |
Monthly Water Temperature Histogram for Atlantic Ocean in St. John's
You can explore detailed data on how the water temperature in St. John's varies each month:
St. John's Weather
MAY 10
41°F / 48°F
overcast clouds: 85-100%humidity: 95% | wind: 2 mph
MAY 11
36°F / 43°F
overcast clouds: 85-100%humidity: 86% | wind: 6 mph
MAY 12
32°F / 41°F
light snowhumidity: 69% | wind: 5 mph
MAY 13
34°F / 39°F
overcast clouds: 85-100%humidity: 71% | wind: 4 mph
Sea Temperature in the Atlantic Ocean in St. John's: General Trends and Swimming Opportunities
The coastal areas of Newfoundland and Labrador, Canada, generally experience a subarctic or cold oceanic climate, characterized by cool summers and cold winters. The weather is highly influenced by the sea, resulting in high levels of humidity, fog, and precipitation throughout most of the year.
St. John's is located in North America in the Northern Hemisphere at a latitude of 48 degrees, along the shores of the Atlantic Ocean. St. John's lies within the Newfoundland And Labrador in Canada.
The average annual daytime air temperature in St. John's is 13°C (55°F), with the average nighttime temperature being 6°C (43°F). The highest average daily temperature occurs in July, reaching 18°C (65°F), while the lowest is in January at 8°C (46°F). As for nighttime temperatures, the minimum average temperature of 2°C (36°F) is recorded in February, and the maximum is in July, reaching 11°C (53°F).
According to historical data, St. John's 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 85 mm (3.4 inches) of precipitation, while the driest month is April, which typically has 13 rainy days and only 62 mm (2.4 inches) of precipitation.
The average annual water temperature in Atlantic Ocean in St. John's is 5°C (41°F). In January, the water reaches its lowest point of the year at -2°C (28°F), while in August, it peaks at 17°C (63°F). In St. John's, the water temperature in the Atlantic Ocean never consistently reaches a comfortable level for swimming in any month.
Geographical Location of St. John's
Nearby Cities
Frequently Asked Questions About St. John's and its Water Temperatures
What is the current sea temperature in St. John's?
The water temperature today in the Atlantic Ocean in St. John's is 35°F (1.8°C).
In which months is the water temperature in St. John's comfortable for swimming?
It cannot be guaranteed that the water temperature in St. John's will be comfortable for swimming in any month of the year.
What is the water temperature in St. John's during the winter?
The water temperature in the Atlantic Ocean in St. John's during the winter ranges from -2°C to 7°C (28°F to 45°F).
What is the water temperature in St. John's during the spring?
The water temperature in the Atlantic Ocean in St. John's during the spring ranges from -2°C to 6°C (28°F to 43°F).
What is the water temperature in St. John's during the summer?
The water temperature in the Atlantic Ocean in St. John's during the summer ranges from 2°C to 17°C (36°F to 63°F).
What is the water temperature in St. John's during the fall?
The water temperature in the Atlantic Ocean in St. John's during the fall ranges from 1°C to 17°C (34°F to 63°F).
Is it possible to swim in the sea in St. John's at any time of the year?
In St. John's, the Atlantic Ocean is quite cold, and swimming is almost impossible as the water temperature never reaches 21°C (70°F).
Is St. John's a popular tourist destination for beach vacations?
St. John's 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 St. John's in the next month?
In June, the water temperature in the Atlantic Ocean in St. John's will range between 36°F (2°C) and 52°F (11°C)