Lake Kielder Water — Current Water Temperature, Annual Trends and Forecast

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

Fontburn Reservoir, United Kingdom © By Glennsmart, Public domain

Current Water Temperature

9.5°C

Today

9.9°C

Yesterday

10.9°C

A Week Ago

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Water Temperature in Lake Kielder Water today is 9.5°C.

Water Temperature: Daily Trends, Historical Records, and Forecast

❌ As of today, the minimum water temperature ranges from 47°F (8°C) to 50°F (10°C). This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing 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.

Water Temperature Chart Over the Last 30 Days

From September 13 to October 14

Table of Daily Sea Temperature Data

Date	Current	Average	Forecast
OCT 7	10.9°C	11.0°C
OCT 8	10.7°C	11.0°C
OCT 9	10.7°C	11.0°C
OCT 10	9.7°C	11.0°C
OCT 11	10.0°C	11.0°C
OCT 12	9.9°C	11.0°C
OCT 13	9.9°C	11.0°C
OCT 14	9.2°C	11.0°C
OCT 15		11.0°C	9.6°C
OCT 16		11.0°C	9.7°C
OCT 17		11.0°C	9.7°C
OCT 18		11.0°C	9.8°C
OCT 19		11.0°C	9.9°C
OCT 20		11.0°C	10.0°C
OCT 21		11.0°C	10.0°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
January	0°C	4°C	7°C
February	0°C	3°C	7°C
March	2°C	6°C	9°C
April	5°C	9°C	12°C
May	9°C	14°C	20°C
June	12°C	19°C	25°C
July	14°C	20°C	25°C
August	14°C	20°C	25°C
September	11°C	17°C	22°C
October	7°C	11°C	14°C
November	4°C	9°C	12°C
December	1°C	5°C	8°C

Lake Kielder Water: Water Temperature by Location

🇬🇧 United Kingdom > England

Lake Kielder Water: Weather Forecast

October 15

° / °

light drizzle

rain: 64% | wind:

October 16

° / °

light drizzle

rain: 22% | wind:

October 17

° / °

overcast

rain: 12% | wind:

October 18

° / °

light drizzle

rain: 14% | wind:

Location & Local Information

#Northumberland

Kielder Water is a large, deep reservoir in Northumberland whose surface temperatures remain cool through the year because of its size and depth. Typical seasonal ranges are roughly 2–6 °C (36–43 °F) in winter, 4–10 °C (39–50 °F) in spring, 12–18 °C (54–64 °F) in summer and 6–12 °C (43–54 °F) in autumn. These are approximate surface values; deeper water stays colder and thermal layers can change quickly after weather shifts. Even in summer the water can feel chilly compared with shallow lakes in warmer regions.

Swimming is not widely promoted around the reservoir for safety and operational reasons: cold temperatures, sudden drop-offs, submerged structures, boat traffic and the fact that Kielder is an operational water supply mean unsupervised bathing is generally discouraged. Organized open-water swimming groups and commercial activity providers operate in controlled areas where safety measures and wetsuits are used. Besides water sports, the surrounding Kielder Water & Forest Park offers forest trails, mountain biking, wildlife watching and the Kielder Observatory, making the area a year‑round destination even for those who don’t venture into the water.

Nearby Lakes

Frequently Asked Questions

What is the current water temperature in Lake Kielder Water?

Water Temperature in Lake Kielder Water today is 9.5°C.

What is the water temperature in Lake Kielder Water during the summer months?

The water temperature in Lake Kielder Water in summer fluctuates in the range of 12°C - 25°C.

Is it possible to swim in Kielder Water (United Kingdom) and what are the possibilities for this?

Yes — swimming is possible in Kielder Water: people enjoy wild/open-water swims or join organised club- and centre-led sessions and events, but the reservoir is deep, cold and used by boats so swimmers should follow local guidance, use suitable thermal protection or buoyancy aids, stick to designated or supervised swims and never go alone.