The Beaverkill is at a good level for the end of July; the USGS website shows a current flow of 241 cubic feet per second, which is above the average flow of 141 CFS on this date over 100 years of record-keeping.
During these summer weeks, hatches of caddis and trichos may be found in the mornings, with the occasional Isonychia, Blue-Winged Olive and perhaps Light Cahill/Sulphurs occurring late in the evenings.
This is the time of year to make use of your terrestrial patterns – ants, beetles, inchworms, grasshoppers. Some fly fishers have had success using nymphs this past week as well.
During times of warmer temperatures, trout activity will be better when the sun is not on the water; under cloudy conditions, as well as in the deeper pool areas and along laid-up stone wall banks.
Don’t forget to drop down in tippet size with smaller flies; use 5X for sizes #14 and #16; 6X for #16 and #18, and 7X for midges or flies in the size #20s.
Favorite Beaverkill flies, when no hatches are apparent, include the Adams in sizes #16, #18 and smaller; the Elk Hair Caddis in sizes #12, 14 and 16; and the Royal Wulff as an attractor fly in sizes #14 – 16.