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Chesterfield Reservoir — Current Water Temperature, Annual Trends and Forecast

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

Lake Walcott, United States
Lake Walcott, United States © Public Domain, Public domain

Current Water Temperature

24.9°C
Today
23.7°C
Yesterday
22.2°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 Chesterfield Reservoir today is 24.9°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 June 20 to July 21

Table of Daily Sea Temperature Data

Date Current Average Forecast
JUL 1422.2°C21.5°C
JUL 1523.5°C21.5°C
JUL 1623.5°C21.5°C
JUL 1723.5°C21.5°C
JUL 1823.6°C21.5°C
JUL 1923.7°C21.5°C
JUL 2023.7°C21.5°C
JUL 2124.6°C21.5°C
JUL 2221.5°C24.7°C
JUL 2321.5°C24.6°C
JUL 2421.5°C24.4°C
JUL 2521.5°C24.2°C
JUL 2621.5°C24.1°C
JUL 2721.5°C23.9°C
JUL 2821.5°C23.7°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
January0°C2°C5°C
February2°C4°C7°C
March3°C6°C10°C
April6°C9°C12°C
May8°C13°C17°C
June13°C17°C21°C
July18°C22°C25°C
August20°C22°C25°C
September17°C20°C23°C
October8°C13°C18°C
November3°C7°C10°C
December0°C3°C6°C

Chesterfield Reservoir: Water Temperature by Location

Chesterfield Reservoir: Weather Forecast

July 22

° / °
overcast
rain: 58% | wind:

July 23

° / °
dense intensity drizzle
rain: 58% | wind:

July 24

° / °
mainly clear
rain: 12% | wind:

July 25

° / °
moderate drizzle
rain: 27% | wind:

July 26

° / °
partly cloudy
rain: 27% | wind:

July 27

° / °
mainly clear
rain: 19% | wind:

Location & Local Information

Chesterfield Reservoir is a relatively shallow, high‑elevation impoundment, so its water temperatures follow the seasons and are strongly influenced by snowmelt and air temperatures. In winter the surface commonly approaches freezing, around 32°F (0°C), and the reservoir can be ice‑covered for extended periods. Spring thaw keeps temperatures cool, roughly 36–50°F (2–10°C) through late spring. By midsummer the warmest surface readings typically reach about 60–72°F (15–22°C) on sunny, calm days, with the warmest pockets near shore; temperatures begin falling through the fall into the 45–60°F (7–15°C) range as air temperatures drop.

Swimming at Chesterfield Reservoir is generally possible and used recreationally in summer, but it is not a supervised swimming facility. The cool spring and early summer water and the risk of hypothermia limit comfortable swimming to the warmest weeks, and there are no lifeguards at most access points, so swimmers are asked to exercise caution. Boat traffic, changing depths, and occasional cold currents from inflowing streams can affect safety. Local rules or seasonal restrictions may apply, so visitors typically check posted signs and use standard precautions—life jackets for weak swimmers, accompaniment, and limiting time in cold water.

Nearby Lakes

Frequently Asked Questions

What is the current water temperature in Chesterfield Reservoir?
Water Temperature in Chesterfield Reservoir today is 24.9°C.
What is the water temperature in Chesterfield Reservoir during the summer months?
The water temperature in Chesterfield Reservoir in summer fluctuates in the range of 13°C - 25°C.
Is it possible to swim in Chesterfield Reservoir and what are the possibilities for this?
Yes, swimming is allowed in Chesterfield Reservoir, Idaho. However, the lack of official swimming areas or lifeguards make it imperative to exercise caution.