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Calamus Reservoir — Current Water Temperature, Annual Trends and Forecast

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

Kirwin Reservoir, United States
Kirwin Reservoir, United States © By USFWS Mountain-Prairie, CC BY 2.0

Current Water Temperature

25.7°C
Today
24.9°C
Yesterday
24.6°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 Calamus Reservoir today is 25.7°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 August 1 to September 1

Table of Daily Sea Temperature Data

Date Current Average Forecast
AUG 2524.6°C26.0°C
AUG 2624.6°C26.0°C
AUG 2724.6°C26.0°C
AUG 2824.6°C26.0°C
AUG 2924.7°C26.0°C
AUG 3024.8°C26.0°C
AUG 3124.9°C26.0°C
SEP 125.7°C23.0°C
SEP 223.0°C25.6°C
SEP 323.0°C25.4°C
SEP 423.0°C25.3°C
SEP 523.0°C25.2°C
SEP 623.0°C25.0°C
SEP 723.0°C24.9°C
SEP 823.0°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
January0°C4°C6°C
February0°C5°C9°C
March1°C8°C15°C
April8°C14°C19°C
May11°C17°C23°C
June17°C22°C26°C
July22°C26°C30°C
August23°C26°C29°C
September20°C23°C26°C
October11°C16°C21°C
November3°C10°C16°C
December0°C2°C5°C

Calamus Reservoir: Water Temperature by Location

Calamus Reservoir: Weather Forecast

September 2

° / °
overcast
rain: 35% | wind:

September 3

° / °
overcast
rain: 11% | wind:

September 4

° / °
slight rain showers
rain: 7% | wind:

September 5

° / °
light drizzle
rain: 13% | wind:

September 6

° / °
overcast
rain: 10% | wind:

Location & Local Information

Calamus Reservoir’s water temperatures follow typical inland reservoir patterns, with cold winters and warm summers. In winter the surface often approaches freezing, roughly 32–40°F (0–4°C), while spring brings a steady rise into the range of about 40–60°F (4–16°C) as ice melts and air temperatures warm. Peak summer surface readings commonly sit between about 68–82°F (20–28°C), occasionally edging a few degrees higher during heat waves. In autumn the lake cools again, with surface temperatures generally falling into the 50–65°F (10–18°C) window as the season progresses. Deeper waters remain cooler year-round, and actual temperatures can vary with weather, inflow, and daytime heating.

Swimming at Calamus Reservoir is generally permitted in the recreation areas and at marked beaches, but conditions and rules can change, so visitors should observe posted signs. There are typically no lifeguards on duty, so swimming is at one’s own risk; flotation devices and swimming with companions are advisable. Seasonal factors such as low water, sudden temperature drops in spring and fall, and occasional algal or bacterial advisories can affect safety, so checking local notices before entering the water is recommended.

Nearby Lakes

Frequently Asked Questions

What is the current water temperature in Calamus Reservoir?
Water Temperature in Calamus Reservoir today is 25.7°C.
What is the water temperature in Calamus Reservoir during the summer months?
The water temperature in Calamus Reservoir in summer fluctuates in the range of 17°C - 30°C.
Is it possible to swim in Calamus Reservoir and what are the possibilities for this?
Yes, swimming is allowed in Calamus Reservoir, Nebraska. Additionally, the reservoir offers camping, picnicking, fishing, and boating facilities for visitors to enjoy.