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Bethlehem

Water Temperature in Bethlehem in Lehigh River: Current and Forecast

On this page, you will find comprehensive information about the water temperature in Bethlehem in Lehigh 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 Bethlehem

59°F

TODAY

61°F

YESTERDAY

59°F

A WEEK AGO

As of today, the minimum water temperature in Bethlehem ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.

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 Lehigh River in Bethlehem Over the Last 30 Days

Today the water temperature in Bethlehem is higher than the same day in previous years. The water temperature range here in May is from 46°F to 70°F. The water temperature has decreased over the past 7 days but has increased over the past month.

The forecasted water temperature values for Bethlehem 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

DateCurrentAverageForecast
May 1559°F56°F
May 1660°F56°F
May 1760°F56°F
May 1860°F56°F
May 1960°F56°F
May 2062°F56°F
May 2161°F56°F
May 2259°F56°F
May 2356°F58°F
May 2456°F58°F
May 2556°F58°F
May 2656°F58°F
May 2756°F58°F
May 2856°F58°F
May 2956°F57°F
May 3056°F57°F
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast

Water Temperature Ranges in Bethlehem by Month

January

MinimumAverageMaximum
37°F40°F48°F

February

MinimumAverageMaximum
37°F42°F48°F

March

MinimumAverageMaximum
37°F44°F52°F

April

MinimumAverageMaximum
41°F50°F61°F

May

MinimumAverageMaximum
46°F56°F70°F

June

MinimumAverageMaximum
57°F65°F72°F

July

MinimumAverageMaximum
63°F68°F75°F

August

MinimumAverageMaximum
63°F71°F73°F

September

MinimumAverageMaximum
52°F64°F66°F

October

MinimumAverageMaximum
46°F56°F61°F

November

MinimumAverageMaximum
37°F47°F61°F

December

MinimumAverageMaximum
37°F40°F46°F

Monthly Water Temperature Histogram for Lehigh River in Bethlehem

Bethlehem Weather

MAY 23

46°F / 52°F
moderate drizzle

rain: 38% | wind: 16 mph

MAY 24

45°F / 57°F
light drizzle

rain: 34% | wind: 14 mph

MAY 25

41°F / 63°F
moderate drizzle

rain: 10% | wind: 12 mph

MAY 26

41°F / 72°F
overcast

rain: 18% | wind: 5 mph

MAY 27

50°F / 59°F
dense intensity drizzle

rain: 37% | wind: 12 mph

Water Temperature in Bethlehem: General Trends and Swimming Opportunities

In Bethlehem, Pennsylvania, the Lehigh River flows through the city, providing a scenic backdrop and recreational opportunities. However, the temperature of the river water generally remains quite cold, especially in the spring and fall. During the summer months, the temperature of the Lehigh River typically ranges from 60°F to 70°F (15°C to 21°C), which is considered chilly for comfortable swimming. The river's water temperature is influenced by various factors, including upstream flows, the time of year, and weather conditions, with spring runoff from surrounding mountains making the water even colder early in the season.

While swimming is not commonly done directly in the river in Bethlehem, the Lehigh River is popular for other water activities such as kayaking, canoeing, and fishing. There are areas where people can wade or take part in recreational floating, but these activities usually occur in designated, calm sections of the river. Due to the fast-moving nature of the Lehigh River in certain areas, swimming can be risky because of potential currents. In general, it's recommended to avoid swimming in the river due to water quality concerns and the strong currents that can make it unsafe.

For those seeking better swimming options near Bethlehem, several nearby lakes and pools, such as those at local parks, offer more ideal conditions for swimming. The colder temperatures of the Lehigh River, combined with the natural conditions, make it more suited for activities like boating or scenic enjoyment rather than swimming.

Geographical Location of Bethlehem

Nearby Cities

Frequently Asked Questions About Bethlehem and its Water Temperatures

What is the current water temperature in Bethlehem?

The water temperature today in Bethlehem is 59°F (14.8°C).

What is the water temperature in Bethlehem during the summer months?

The average water temperature in Bethlehem 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 Bethlehem in May?

The average water temperature in Bethlehem in May ranges from 46°F to 70°F (8°C to 21°C).

What is the water temperature in Bethlehem in September?

The average water temperature in Bethlehem in September is typically between 52°F to 66°F (11°C to 19°C).

Is it possible to swim in the Lehigh River in Bethlehem, and what are the available options for doing so?

Yes, you can swim in Lehigh River, Bethlehem. Options involve swimming at designated areas like Sand Island or joining local water sports organizations for safe and controlled experiences.