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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

26.5°C
Today
26.4°C
Yesterday
25.4°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 26.5°C.

Water Temperature: Daily Trends, Historical Records, and Forecast

✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 July 11 to August 11

Table of Daily Sea Temperature Data

Date Current Average Forecast
AUG 425.4°C23.1°C
AUG 525.3°C23.1°C
AUG 625.8°C23.1°C
AUG 725.9°C23.1°C
AUG 825.9°C23.1°C
AUG 925.9°C23.1°C
AUG 1026.4°C23.1°C
AUG 1126.5°C23.1°C
AUG 1223.1°C26.3°C
AUG 1323.1°C26.2°C
AUG 1423.1°C26.0°C
AUG 1523.1°C25.8°C
AUG 1623.1°C25.7°C
AUG 1723.1°C25.5°C
AUG 1823.1°C25.3°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°C26°C
August20°C23°C27°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

August 12

° / °
overcast
rain: 6% | wind:

August 13

° / °
moderate rain showers
rain: 62% | wind:

August 14

° / °
dense intensity drizzle
rain: 62% | wind:

August 15

° / °
light drizzle
rain: 53% | wind:

August 16

° / °
light drizzle
rain: 38% | 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 26.5°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 - 27°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.