Lough Neagh water temperature
Lough Neagh, Washing Bay · Lake
The current water temperature at Lough Neagh is 16.5 °C (as of September 13, 2026, source: DAERA/NIEA).
Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.
Measurement series & statistics
This measurement series includes 379 data points since August 25, 2026.
Lowest recorded value: 15.3 °C on September 9, 2026 · highest value: 20.1 °C on August 28, 2026.
In September, temperatures have ranged between 15.3 °C and 17.9 °C.
The current value is 0.2 °C below the September average of this series.
Nearby waters
More measuring points: Lough Neagh
Frequently asked questions
Can you swim at Lough Neagh right now?
The current water temperature is 16.5 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lough Neagh?
Currently 16.5 °C (updated continuously).
How warm is at Lough Neagh in September?
In September, the water temperature recently averaged 16.7 °C.
