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Yosemite Valley
Water Temperature in Yosemite Valley in Merced River: Current and Forecast
On this page, you will find comprehensive information about the water temperature in Yosemite Valley in Merced River, 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 Yosemite Valley
47°F
TODAY
47°F
YESTERDAY
49°F
A WEEK AGO
As of today, the minimum water temperature in Yosemite Valley ranges from 47°F (8°C) to 50°F (10°C). 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.
Analysis, Historical Data, and Forecast of Water Temperature
Water Temperature Chart for Merced River in Yosemite Valley Over the Last 30 Days
Today the water temperature in Yosemite Valley is lower than the same day in previous years. The water temperature range here in April is from 41°F to 61°F. The water temperature has decreased over the past 7 days but has increased over the past month.
The forecasted water temperature values for Yosemite Valley are presented in the table below.
The actual water temperature values near the shore may differ by a few degrees from the stated values. For the development of the forecast, we use our own mathematical model that takes into account the current water temperature changes, historical data, and key weather trends, including wind strength and direction, and air temperature in each specific region.
Table of Daily Water Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| Apr 23 | 49°F | 50°F | |
| Apr 24 | 49°F | 50°F | |
| Apr 25 | 49°F | 50°F | |
| Apr 26 | 47°F | 50°F | |
| Apr 27 | 47°F | 50°F | |
| Apr 28 | 47°F | 50°F | |
| Apr 29 | 47°F | 50°F | |
| Apr 30 | 47°F | 50°F | |
| May 1 | 56°F | 47°F | |
| May 2 | 56°F | 48°F | |
| May 3 | 56°F | 48°F | |
| May 4 | 56°F | 49°F | |
| May 5 | 56°F | 49°F | |
| May 6 | 56°F | 50°F | |
| May 7 | 56°F | 50°F | |
| May 8 | 56°F | 50°F |
Water Temperature Ranges in Yosemite Valley by Month
January
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 40°F | 48°F |
February
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 42°F | 48°F |
March
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 44°F | 52°F |
April
| Minimum | Average | Maximum |
|---|---|---|
| 41°F | 50°F | 61°F |
May
| Minimum | Average | Maximum |
|---|---|---|
| 46°F | 56°F | 70°F |
June
| Minimum | Average | Maximum |
|---|---|---|
| 57°F | 65°F | 72°F |
July
| Minimum | Average | Maximum |
|---|---|---|
| 63°F | 68°F | 75°F |
August
| Minimum | Average | Maximum |
|---|---|---|
| 63°F | 71°F | 73°F |
September
| Minimum | Average | Maximum |
|---|---|---|
| 52°F | 64°F | 66°F |
October
| Minimum | Average | Maximum |
|---|---|---|
| 46°F | 56°F | 61°F |
November
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 47°F | 61°F |
December
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 40°F | 46°F |
Monthly Water Temperature Histogram for Merced River in Yosemite Valley
Yosemite Valley Weather
APRIL 30
48°F / 66°F
slight snow showerrain: 44% | wind: 11 mph
MAY 1
46°F / 68°F
slight rain showersrain: 44% | wind: 8 mph
MAY 2
50°F / 68°F
slight rain showersrain: 30% | wind: 7 mph
MAY 3
46°F / 64°F
slight rain showersrain: 58% | wind: 7 mph
MAY 4
43°F / 48°F
light drizzlerain: 58% | wind: 4 mph
Water Temperature in Yosemite Valley: General Trends and Swimming Opportunities
Yosemite Valley, located in Yosemite National Park, is home to the Merced River, a popular waterway for visitors to explore. The water temperature in the Merced River varies depending on the season, with the warmest temperatures occurring during the summer months. From late spring to early fall, the water temperature generally ranges from 60°F (15°C) to 70°F (21°C), which can feel refreshing on hot days, especially given the warm temperatures in the valley, which can exceed 90°F (32°C). These temperatures make the river a suitable spot for short swims, wading, or cooling off after a hike, though the water can still feel cool compared to warmer lakes or pools.
In the winter months, the temperature of the Merced River drops significantly, typically ranging from 40°F (4°C) to 50°F (10°C), making swimming very uncomfortable and unsafe. The water is often quite cold, and the current can be stronger during this time, which increases the risk for swimmers. As a result, swimming in the river is not recommended during the colder months, and other activities such as cross-country skiing, snowshoeing, and winter hiking are more popular during this time of year.
The Merced River offers a unique setting for water-based activities, but visitors should be cautious of the water’s chill and swift currents in certain sections. For those seeking a more controlled swimming environment, nearby lakes, like Mirror Lake, offer calmer waters with warmer temperatures during the summer, though the river itself remains an iconic feature for those looking to experience Yosemite's natural beauty up close. The river is also popular for other activities such as rafting and kayaking, particularly in areas where the current is not as strong.
Geographical Location of Yosemite Valley
Frequently Asked Questions About Yosemite Valley and its Water Temperatures
What is the current water temperature in Yosemite Valley?
The water temperature today in Yosemite Valley is 47°F (8.1°C).
What is the water temperature in Yosemite Valley during the summer months?
The average water temperature in Yosemite Valley during the summer months is typically between 65°F to 71°F (19°C to 21°C), and it can reach up to 75°F (24°C) at its warmest. However, in some years, the temperature may exceed this range.
What is the water temperature in Yosemite Valley in May?
The average water temperature in Yosemite Valley in May ranges from 46°F to 70°F (8°C to 21°C).
What is the water temperature in Yosemite Valley in September?
The average water temperature in Yosemite Valley in September is typically between 52°F to 66°F (11°C to 19°C).
Is it possible to swim in the Merced River in Yosemite Valley, and what are the available options for doing so?
Yes, swimming is allowed in the Merced River in Yosemite Valley. The most popular spots are the Housekeeping Camp, Merced River at Curry Village, and Cathedral Beach.