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Lake Saint John

Lake Saint John Current Water Temperature and Forecast

On this page, you will find comprehensive information about the water temperature in Lake Saint John, 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 Lake Water Temperature Information

21.7°C

TODAY

21.5°C

YESTERDAY

21.4°C

A WEEK AGO

As of today, the minimum water temperature in the Lake Saint John ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience.

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 Lake Saint John Over the Last 30 Days

Today the water temperature in Lake Saint John is higher than the same day in previous years. The water temperature range here in July is from 17°C to 22°C. The water temperature is trending upward, and it has increased both over the past 30 days and the past week.

The forecasted water temperature values for Lake Saint John 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.

Daily Water Temperature Chart

Date	Current	Average	Forecast
Jul 9	21.4°C	19.4°C
Jul 10	21.4°C	19.4°C
Jul 11	21.5°C	19.4°C
Jul 12	21.6°C	19.4°C
Jul 13	21.7°C	19.4°C
Jul 14	21.6°C	19.4°C
Jul 15	21.5°C	19.4°C
Jul 16	21.7°C	19.4°C
Jul 17		19.4°C	21.6°C
Jul 18		19.4°C	21.5°C
Jul 19		19.4°C	21.4°C
Jul 20		19.4°C	21.3°C
Jul 21		19.4°C	21.2°C
Jul 22		19.4°C	21.1°C
Jul 23		19.4°C	21.0°C
Jul 24		19.4°C	20.9°C

* Current - Actual water temperature value

** Average - Average water temperature on this day in recent years

*** Forecast - Our water temperature forecast

Water Temperature Ranges in Lake Saint John by Month

January

Minimum	Average	Maximum
1°C	6.5°C	12°C

February

Minimum	Average	Maximum
0°C	7.5°C	15°C

March

Minimum	Average	Maximum
0°C	8.5°C	17°C

April

Minimum	Average	Maximum
2°C	11°C	20°C

May

Minimum	Average	Maximum
8°C	14.5°C	21°C

June

Minimum	Average	Maximum
16°C	20°C	24°C

July

Minimum	Average	Maximum
17°C	19.4°C	22°C

August

Minimum	Average	Maximum
23°C	25.6°C	28°C

September

Minimum	Average	Maximum
18°C	20°C	22°C

October

Minimum	Average	Maximum
5°C	7.2°C	10°C

November

Minimum	Average	Maximum
4°C	6.7°C	9°C

December

Minimum	Average	Maximum
6°C	8.3°C	11°C

Monthly Water Temperature Histogram for Lake Saint John

Known Beaches in the Area of Lake Saint John?

Arlington Beach

Arlington Beach is a 2-stars sandy beach, located in a 8 km (5 miles) radius of Lake Saint John. There is parking.

South Poinsett Access Area

South Poinsett Access Area is a 2-stars sandy beach, located in a 9 km (6 miles) radius of Lake Saint John. There are restrooms. South Poinsett Access Area is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish.

Lake Saint John Weather

JULY 17

10°C / 24°C

overcast

rain: 23% | wind: 19 km/h

JULY 18

12°C / 28°C

overcast

rain: 9% | wind: 26 km/h

JULY 19

17°C / 28°C

moderate rain showers

rain: 33% | wind: 45 km/h

JULY 20

15°C / 27°C

light drizzle

rain: 18% | wind: 24 km/h

Water Temperature in Lake Saint John: General Trends and Swimming Opportunities

Lake Saint John (SD) is located in the state of South Dakota, in the county of Hamlin, at an elevation of 1650 feet (503 meters) above sea level.

Lake Saint John (SD) is a small lake. Its surface area is 1.99 sq mi (5.14 sq km). These are small water bodies often used for recreation, fishing, or irrigation.

The water temperature in Lake Saint John (SD) varies throughout the year, ranging from 39°F (4°C) in November to 82°F (28°C) in August. The average annual water temperature of the lake is 59°F (15°C). The months when the average water temperature in Lake Saint John (SD) exceeds 68 degrees Fahrenheit (20°C) are June, August and September.

The nearest cities ans towns to Lake Saint John are: Hayti, Volga, De Smet, Watertown, Brookings, Clear Lake in South Dakota.

Geographical Location of Lake Saint John

Nearby Lakes

Frequently Asked Questions About Lake Saint John and its Water Temperatures

What is the current water temperature in Lake Saint John?

The water temperature today in Lake Saint John is 71°F (21.7°C).

What is the water temperature in Lake Saint John during the summer months?

The average water temperature in Lake Saint John during the summer months is typically between 67°F to 78°F (19°C to 26°C), and it can reach up to 82°F (28°C) at its warmest. However, in some years, the temperature may exceed this range.

What is the water temperature in Lake Saint John in May?

The average water temperature in Lake Saint John in May ranges from 61°F to 70°F (16°C to 21°C).

What is the water temperature in Lake Saint John in September?

The average water temperature in Lake Saint John in September is typically between 64°F to 72°F (18°C to 22°C).

Where is Lake Saint John located?

Lake Saint John is located in the United States in the state of South Dakota, in the county of Hamlin, at an elevation of 1650 feet (503 meters) above sea level. The surface area of the lake is 1.986 sq mi (5.14 sq km).

Is it possible to swim in Lake Saint John and what are the possibilities for this?

Yes, it is possible to swim in Lake Saint John, South Dakota, provided that there are no local restrictions or advisories in place. The suitability for swimming may be influenced by factors such as water temperature, cleanliness, and weather conditions.

What are the coordinates of Lake Saint John?

Lake Saint John is located at coordinates 44.5650°N 97.1860°W.

Is Lake Lake Saint John a popular vacation spot among Americans?

Lake Saint John enjoys local popularity among the residents of State South Dakota, and nationally, it ranks in the top 10 percent of all lakes in the country.