6ft Water Temperature 17c. secchi Disk 2.2m Water temp at 17c is below our upper limit for pike fly fishing which is above 18c so now is a good time to try fly piking and we have boats available this week!!. Colin Halliday had fun yesterday with this big fish (weighed at 27lbs). This was yesterday's temperature. so with snow on the hills last night it may be at 16c today. | Lake of Menteith Fisheries