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Delaware River
Delaware River Current Water Temperature and Forecast
On this page, you will find comprehensive information about the water temperature in Delaware 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 Delaware River
15.9°C
TODAY
15.8°C
YESTERDAY
14.2°C
A WEEK AGO
As of today, the minimum water temperature in the Delaware River ranges from 50°F (10°C) to 54°F (12°C). The water is slightly warmer, but still cool for most people. Swimming in such conditions is possible, but for most people, the time spent in the water should be limited to avoid hypothermia. Even experienced swimmers may feel discomfort if they stay in the water for too long. To improve comfort and safety, a wetsuit 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 Delaware River Over the Last 30 Days
Today the water temperature in Delaware River is higher than the same day in previous years. The water temperature range here in May is from 8°C to 21°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 Delaware River 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 |
|---|---|---|---|
| May 2 | 14.2°C | 13.4°C | |
| May 3 | 15.1°C | 13.4°C | |
| May 4 | 15.7°C | 13.4°C | |
| May 5 | 15.8°C | 13.4°C | |
| May 6 | 16.7°C | 13.4°C | |
| May 7 | 16.6°C | 13.4°C | |
| May 8 | 15.8°C | 13.4°C | |
| May 9 | 15.9°C | 13.4°C | |
| May 10 | 13.4°C | 15.7°C | |
| May 11 | 13.4°C | 15.6°C | |
| May 12 | 13.4°C | 15.5°C | |
| May 13 | 13.4°C | 15.4°C | |
| May 14 | 13.4°C | 15.3°C | |
| May 15 | 13.4°C | 15.2°C | |
| May 16 | 13.4°C | 15.1°C | |
| May 17 | 13.4°C | 15.0°C |
Water Temperature Ranges in Delaware River by Month
January
| Minimum | Average | Maximum |
|---|---|---|
| 1°C | 5°C | 9°C |
February
| Minimum | Average | Maximum |
|---|---|---|
| 1°C | 5°C | 9°C |
March
| Minimum | Average | Maximum |
|---|---|---|
| 3°C | 6.7°C | 11°C |
April
| Minimum | Average | Maximum |
|---|---|---|
| 5°C | 9.9°C | 16°C |
May
| Minimum | Average | Maximum |
|---|---|---|
| 8°C | 13.4°C | 21°C |
June
| Minimum | Average | Maximum |
|---|---|---|
| 14°C | 18.5°C | 22°C |
July
| Minimum | Average | Maximum |
|---|---|---|
| 17°C | 20°C | 24°C |
August
| Minimum | Average | Maximum |
|---|---|---|
| 17°C | 21.4°C | 23°C |
September
| Minimum | Average | Maximum |
|---|---|---|
| 11°C | 17.6°C | 19°C |
October
| Minimum | Average | Maximum |
|---|---|---|
| 8°C | 13.3°C | 16°C |
November
| Minimum | Average | Maximum |
|---|---|---|
| 3°C | 8.1°C | 16°C |
December
| Minimum | Average | Maximum |
|---|---|---|
| 3°C | 4.7°C | 8°C |
Monthly Water Temperature Histogram for Delaware River
Water Temperature in Cities and Towns on Delaware River
Delaware River Weather
MAY 10
6°C / 20°C
overcastrain: 55% | wind: 25 km/h
MAY 11
8°C / 21°C
overcastrain: 4% | wind: 15 km/h
MAY 12
7°C / 23°C
overcastrain: 1% | wind: 10 km/h
MAY 13
10°C / 17°C
moderate drizzlerain: 17% | wind: 8 km/h
MAY 14
16°C / 24°C
moderate drizzlerain: 42% | wind: 12 km/h
Water Temperature in Delaware River: General Trends and Swimming Opportunities
Source West Branch
• location Mount Jefferson, Town of Jefferson, Schoharie County, New York, United States
Mouth Delaware Bay
• location Delaware, United States
• elevation 0 ft (0 m)
Length 282 miles (454 km)
The Delaware River, stretching over 300 miles from New York to Delaware Bay, offers a diverse range of water temperatures throughout the year, influenced by seasonal changes and geographical location. In the upper sections of the river, closer to its mountainous origins, the water remains cooler, particularly during spring and early summer, with temperatures often ranging between 50°F and 65°F (10°C to 18°C). As the river flows southward and enters more temperate regions, summer water temperatures can climb to 70°F–80°F (21°C–27°C), making it more suitable for swimming and recreational activities.
Swimming in the Delaware River is popular, especially during the warmer months from late June to early September. However, the river’s suitability for swimming depends on local conditions such as water depth, flow rate, and safety advisories. Calm stretches, particularly around the Delaware Water Gap and areas managed by the National Park Service, are favored by swimmers and kayakers. It's important to note that while the water temperature may be comfortable in summer, checking for current conditions and safety guidelines is essential before diving in, as occasional strong currents or water quality concerns can arise.
Geographical Location of Delaware River
Frequently Asked Questions About Delaware River and its Water Temperatures
What is the current water temperature in Delaware River?
The water temperature today in Delaware River ranges from 50°F (10.1°C) to 67°F (19.3°C).
What is the water temperature in Delaware River during the summer months?
The average water temperature in Delaware River 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 Delaware River in May?
The average water temperature in Delaware River in May ranges from 46°F to 70°F (8°C to 21°C).
What is the water temperature in Delaware River in September?
The average water temperature in Delaware River in September is typically between 52°F to 66°F (11°C to 19°C).
Where does Delaware River flow?
Delaware River flows through United States (New York, New Jersey, Pennsylvania, Delaware, Maryland).
Is it possible to swim in the Delaware River?
Yes, it is possible to swim in the Delaware River. However, caution is advised due to potential hazards such as strong currents and water quality issues.
What major cities are located on Delaware River?
Cities along the course of Delaware River include Camden (New Jersey), Philadelphia (Pennsylvania), Trenton (New Jersey), Wilmington (Delaware).