Lough Derg water level

Water level recorded at OPW (Office of Public Works) gauge 0000025341, refreshed every 15 minutes to an hour depending on the station.

Water level history

Water level · OPW gauge 0000025341

Reading the chart. OPW (Office of Public Works) gauges report stage — water level in metres above each station's own datum. The absolute number matters less than the trend: a falling level means shrinking launch depth and exposed shoals, a rising one means floating debris and lost beach.

Water levels respond to reservoir releases, abstraction, and recent rainfall. For launch decisions, combine the trend here with the wind forecast — falling water plus strong wind makes steep, tired slips and exposed margins.