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New Bullards Bar Reservoir — Current Water Temperature, Annual Trends and Forecast

This page provides information on the current water temperature in New Bullards Bar Reservoir, trends, monthly ranges and the forecast for the coming days.

Lake Oroville, United States
Lake Oroville, United States © Frank Schulenburg, CC BY-SA 4.0

Current Water Temperature

24.4°C
Today
24.7°C
Yesterday
25.3°C
A Week Ago
Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

Water Temperature in New Bullards Bar Reservoir today is 24.4°C.

Water Temperature: Daily Trends, Historical Records, and Forecast

✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 Over the Last 30 Days

From May 30 to June 30

Table of Daily Sea Temperature Data

Date Current Average Forecast
JUN 2325.3°C21.6°C
JUN 2425.2°C21.6°C
JUN 2525.2°C21.6°C
JUN 2625.2°C21.6°C
JUN 2725.4°C21.6°C
JUN 2824.8°C21.6°C
JUN 2924.7°C21.6°C
JUN 3024.4°C21.6°C
JUL 125.5°C24.5°C
JUL 225.5°C24.5°C
JUL 325.5°C24.6°C
JUL 425.5°C24.6°C
JUL 525.5°C24.7°C
JUL 625.5°C24.7°C
JUL 725.5°C24.8°C

* Current - Actual water temperature value

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

*** Forecast - Our water temperature forecast

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 to enhance accuracy.

Monthly Water Temperature Range (Min, Max & Average)

Month Min Avg Max
January6°C9°C11°C
February5°C8°C10°C
March5°C11°C18°C
April8°C12°C16°C
May13°C18°C22°C
June18°C22°C26°C
July22°C26°C29°C
August23°C26°C29°C
September21°C24°C26°C
October16°C20°C23°C
November10°C14°C18°C
December8°C12°C14°C

New Bullards Bar Reservoir: Water Temperature by Location

New Bullards Bar Reservoir: Weather Forecast

July 1

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July 4

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July 5

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July 6

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Location & Local Information

New Bullards Bar Reservoir is a deep Sierra foothill impoundment, so water temperatures vary a lot by season and depth. Surface temperatures in winter commonly sit around the low 40s to low 50s °F (about 4–11 °C). In spring the surface typically warms to roughly 45–60 °F (7–15 °C) as snowmelt and sun increase inflow. Peak summer surface readings often range from about 60–75 °F (16–24 °C), though on very hot, calm afternoons small bays can warm a few degrees higher. Because the reservoir is deep and fed by cold river flow and releases from near the bottom, deeper water remains considerably colder year-round, and abrupt thermoclines can cause sudden temperature drops below the surface.

Swimming is generally possible but treated as a higher-risk activity. There are no widespread lifeguarded beaches, water levels and currents change with hydroelectric releases, and boat traffic is common, so people swim at their own risk in unstaffed areas. The combination of cold water, steep drop-offs, and potential cold-water shock makes cautious preparation important: enter gradually, avoid long swims alone, and wear flotation if venturing far from shore. Local rules or seasonal restrictions may apply to specific access points, so visitors should heed posted signage and safety guidance.

Nearby Lakes

Frequently Asked Questions

What is the current water temperature in New Bullards Bar Reservoir?
Water Temperature in New Bullards Bar Reservoir today is 24.4°C.
What is the water temperature in New Bullards Bar Reservoir during the summer months?
The water temperature in New Bullards Bar Reservoir in summer fluctuates in the range of 18°C - 29°C.
Is it possible to swim in New Bullards Bar Reservoir and what are the possibilities for this?
Yes, swimming is allowed in New Bullards Bar Reservoir, California. The reservoir accommodates swimming activities near the Dark Day Campground area and its designated beach.