He is only about 1500km off the coast of Chile and nearing the end of his more than 7000km journey, but his boat, the Akros, has been severely damaged.
In a regular online blog, Mr Konyukhov reported the waves coming at him like ''a wall, lifting the boat to a great height, at which point the boat flies down the wave, coming to a halt in the trough''.
''The foamy crests are several metres high, and the boat simply drowns in them.''
Mr Konyukhov said one of the waves capsized his boat sideways, turning it 360 degrees before returning it to an even keel.
''It completely tore off part of the solar panels on the port side, some now remain flapping around the cabin.
''It also wiped off the wind index, so I no longer have data about the direction or strength of the wind.''
Within the hour, the boat capsized another two times.
The third time, it did not return to even keel for some time and lay ''slightly keel up'', flooded at starboard until it was struck by a passing wave and returned to an even keel, he said.
''The first hit was the most powerful, making the boat crack. I was in the aft cabin with all hatches battened down.
''For 117 days, the Akros has not capsized once, and today it capsized three times in an hour.''
Mr Konyukhov's last communication said the wind had began to calm, but it was still too difficult to check the damage to his boat.
''It is obvious that an entire row of port side solar panels is gone. I can hear some of them flapping about.
''The newly installed wind-index was completely destroyed and it was only installed a day ago. For now, it remains impossible to find out what is happening in the front compartment - whether there is any damage or if it is taking on water.
''It is impossible to open the front hatch as the waves are still 5m high and flooding the deck.''
Mr Konyukhov said he would have to wait until the weather improved before he could do a full damage inspection of the boat.
Fortunately, the boat is still able to communicate with the outside world.
