The Seven is a spate river and levels can rise and fall rapidly. Here are some notes prepared by Chris Leggett on river levels and how they relate to fishing.
The gauge is situated by the bridge over the river in the middle of Sinnington.
This was the river at Marton (2 miles downstream of Sinnington) on 2nd May 2017. The river had looked like this for a couple of weeks. The gauge at Sinnington bridge was reading 0.197 – fishable but hard going!
This is the river in the same place on 6th June 2017. It’s coming up after some rain and the gauge at Sinnington was reading 0.55.
I’d say the river was just about fishable.
This is the river in the same place a day later, 7th June 2017. The gauge at Sinnington was reading 1.024 and the river was coming down from a peak level of 1.35 overnight – which was the highest level it reached all year.
Here’s the river on 13th October 2017, gauge reading was 0.27 – just at the lower edge of perfect!
The level of the water is obviously not the only factor in the condition of the river, but in my experience if the gauge reading is between 0.25 and 0.5, the river should be fishable.
Here's a liveview of the levels - click for more info