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Water Temperature in the Salish Sea in Seattle, Washington: Current, Historical Data and Forecast
On this page, you will find comprehensive information about the sea temperature in Seattle in Washington, 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 Seattle
50°F
TODAY
49°F
YESTERDAY
47°F
A WEEK AGO
Analysis, Historical Data, and Forecast of Water Temperature
Today sea water temperature in the Salish Sea in Seattle is 9.5°F. This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing can be used.
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 Salish Sea in Seattle Over the Last 30 Days
The water temperature in Seattle 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 Seattle will remain nearly unchanged in the coming days, its value will be 50°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 Seattle 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 |
|---|---|---|---|
| Apr 9 | 47°F | 48°F | |
| Apr 10 | 47°F | 49°F | |
| Apr 11 | 47°F | 50°F | |
| Apr 12 | 47°F | 49°F | |
| Apr 13 | 48°F | 49°F | |
| Apr 14 | 49°F | 50°F | |
| Apr 15 | 49°F | 48°F | |
| Apr 16 | 49°F | 51°F | |
| Apr 17 | 51°F | 50°F | |
| Apr 18 | 50°F | 50°F | |
| Apr 19 | 50°F | 50°F | |
| Apr 20 | 49°F | 50°F | |
| Apr 21 | 49°F | 50°F | |
| Apr 22 | 51°F | 50°F | |
| Apr 23 | 49°F | 50°F | |
| Apr 24 | 50°F | 50°F |
Sea Temperature in Seattle Throughout the Year
Throughout the year, the sea temperature in Seattle never exceeds 64°F (18°C).
Below is the annual chart of sea temperature changes in the Salish Sea in Seattle.
January
| Minimum | Average | Maximum |
|---|---|---|
| 45°F | 48°F | 52°F |
February
| Minimum | Average | Maximum |
|---|---|---|
| 43°F | 47°F | 52°F |
March
| Minimum | Average | Maximum |
|---|---|---|
| 43°F | 47°F | 52°F |
April
| Minimum | Average | Maximum |
|---|---|---|
| 45°F | 49°F | 54°F |
May
| Minimum | Average | Maximum |
|---|---|---|
| 46°F | 53°F | 59°F |
June
| Minimum | Average | Maximum |
|---|---|---|
| 48°F | 54°F | 59°F |
July
| Minimum | Average | Maximum |
|---|---|---|
| 50°F | 55°F | 59°F |
August
| Minimum | Average | Maximum |
|---|---|---|
| 50°F | 55°F | 59°F |
September
| Minimum | Average | Maximum |
|---|---|---|
| 50°F | 55°F | 59°F |
October
| Minimum | Average | Maximum |
|---|---|---|
| 48°F | 53°F | 57°F |
November
| Minimum | Average | Maximum |
|---|---|---|
| 46°F | 51°F | 55°F |
December
| Minimum | Average | Maximum |
|---|---|---|
| 43°F | 47°F | 52°F |
Monthly Water Temperature Histogram for Salish Sea in Seattle
You can explore detailed data on how the water temperature in Seattle varies each month:
What Beaches Are There In and Around Seattle?
Maury Island
Maury Island is a 2-stars sandy beach, is located directly in Seattle. There are restrooms. There are cafés.
Jack Perry Memorial Viewpoint
Jack Perry Memorial Viewpoint is a 2-stars sandy beach, located in a 2 km (1 miles) radius of Seattle. There is parking. There are restrooms.
Lake Union Park
Lake Union Park is a 3-stars sandy beach, located in a 2 km (1 miles) radius of Seattle. There is parking. There are restrooms. There are cafés.
Pocket Beach
Pocket Beach is a 3-stars sandy beach, located in a 2 km (1 miles) radius of Seattle. There is parking. There are cafés. Pocket Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Olympic Sculpture Park
Olympic Sculpture Park is a 3-stars sandy beach, located in a 2 km (1 miles) radius of Seattle. There is parking. There are restrooms. There are cafés.
Myrtle Edwards Park
Myrtle Edwards Park is a 3-stars sandy beach, located in a 2 km (1 miles) radius of Seattle. There is parking. There are restrooms. There are cafés. Myrtle Edwards Park is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish.
Luna Park
Luna Park is a 1-stars sandy beach, located in a 3 km (2 miles) radius of Seattle.
Magnolia Park
Magnolia Park is a 3-stars sandy beach, located in a 3 km (2 miles) radius of Seattle. There is parking. There are restrooms. There are cafés.
Mount Baker Beach
Mount Baker Beach is a 4-stars sandy beach, located in a 4 km (2 miles) radius of Seattle. There are lifeguards on the beach. There is parking. There are restrooms. There are cafés. Mount Baker Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish.
Seacrest Park
Seacrest Park is a 4-stars sandy beach, located in a 4 km (2 miles) radius of Seattle. There is parking. There are restrooms. There are cafés. Seacrest Park is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. Snorkeling is possible. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Elliot Bay Park
Elliot Bay Park is a 3-stars sandy beach, located in a 4 km (2 miles) radius of Seattle. There is parking. There are restrooms. Elliot Bay Park is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish.
Southwest Spokane Street Bridge
Southwest Spokane Street Bridge is a 2-stars sandy beach, located in a 4 km (2 miles) radius of Seattle. There is parking. There are cafés.
Denny Blaine Beach
Denny Blaine Beach is a 1-stars sandy beach, located in a 4 km (2 miles) radius of Seattle. For those who prefer clothing-optional beaches, Denny Blaine Beach is a designated nudist beach.
Don Armeni Park
Don Armeni Park is a 5-stars sandy beach, located in a 4 km (2 miles) radius of Seattle. There is parking. There are restrooms. There are cafés. Don Armeni Park 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.
Madrona Beach
Madrona Beach is a 4-stars sandy beach, located in a 4 km (2 miles) radius of Seattle. There are lifeguards on the beach. There is parking. There are restrooms. There are cafés.
Jack Block Park
Jack Block Park is a 3-stars sandy beach, located in a 4 km (2 miles) radius of Seattle. There is parking. There are restrooms. There are cafés. Jack Block Park is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish.
Colman Beach
Colman Beach is a 3-stars sandy beach, located in a 4 km (2 miles) radius of Seattle. There is parking. Colman Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Diagonal Street South Pacific Access
Diagonal Street South Pacific Access is a 2-stars sandy beach, located in a 5 km (3 miles) radius of Seattle. There is parking.
Duwamish Public Access
Duwamish Public Access is a 2-stars sandy beach, located in a 5 km (3 miles) radius of Seattle. There is parking. There are restrooms.
Smith Cove Park
Smith Cove Park is a 4-stars sandy beach, located in a 5 km (3 miles) radius of Seattle. There is parking. There are restrooms. There are cafés. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.
Seattle Weather
APRIL 17
43°F / 63°F
clear skyhumidity: 56% | wind: 1 mph
APRIL 18
46°F / 70°F
broken clouds: 51-84%humidity: 73% | wind: 1 mph
APRIL 19
43°F / 55°F
overcast clouds: 85-100%humidity: 77% | wind: 1 mph
Sea Temperature in the Salish Sea in Seattle: General Trends and Swimming Opportunities
The coastal area of Washington State, U.S., experiences a marine oceanic climate, characterized by cool, wet winters and mild, relatively dry summers. The region receives significant rainfall throughout the year, with November typically being the wettest month, while July and August are the driest and warmest.
Seattle is located in North America in the Northern Hemisphere at a latitude of 48 degrees, along the shores of the Salish Sea. Seattle lies within the Washington in United States.
The average annual daytime air temperature in Seattle is 61°F (16°C), with the average nighttime temperature being 45°F (7°C). The highest average daily temperature occurs in August, reaching 77°F (25°C), while the lowest is in December at 45°F (7°C). As for nighttime temperatures, the minimum average temperature of 35°F (2°C) is recorded in December, and the maximum is in July, reaching 55°F (13°C).
According to historical data, Seattle experiences 153 rainy days per year, which accounts for 42 percent of all days in the year. On average, there are 13 rainy days each month. The wettest month is November, with 19 rainy days and 6.1 inches (156 mm) of precipitation, while the driest month is July, which typically has 5 rainy days and only 0.8 inches (20 mm) of precipitation.
The average annual water temperature in Salish Sea in Seattle is 52°F (11°C). In February, the water reaches its lowest point of the year at 43°F (6°C), while in May, it peaks at 59°F (15°C). In Seattle, the water temperature in the Salish Sea never consistently reaches a comfortable level for swimming in any month.
Geographical Location of Seattle
Nearby Cities
Frequently Asked Questions About Seattle and its Water Temperatures
What is the current sea temperature in Seattle?
The water temperature today in the Salish Sea in Seattle is 50°F (9.8°C).
In which months is the water temperature in Seattle comfortable for swimming?
It cannot be guaranteed that the water temperature in Seattle will be comfortable for swimming in any month of the year.
What is the water temperature in Seattle during the winter?
The water temperature in the Salish Sea in Seattle during the winter ranges from 43°F to 52°F (6°C to 11°C).
What is the water temperature in Seattle during the spring?
The water temperature in the Salish Sea in Seattle during the spring ranges from 43°F to 59°F (6°C to 15°C).
What is the water temperature in Seattle during the summer?
The water temperature in the Salish Sea in Seattle during the summer ranges from 48°F to 59°F (9°C to 15°C).
What is the water temperature in Seattle during the fall?
The water temperature in the Salish Sea in Seattle during the fall ranges from 46°F to 59°F (8°C to 15°C).
Is it possible to swim in the sea in Seattle at any time of the year?
In Seattle, the Salish Sea is quite cold, and swimming is almost impossible as the water temperature never reaches 70°F (21°C).
Is Seattle a popular tourist destination for beach vacations?
Seattle 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 Seattle in the next month?
In May, the water temperature in the Salish Sea in Seattle will range between 46°F (8°C) and 59°F (15°C)