In reply to Julian Prieto:
There is hope yet. Spring can bring 'alpine' conditions to the Ben. I've seen Indicator Wall climbed on a day when it was +20'c in Ft William. It was a high pressure in April and an early start was required, but overnight freezes plus a slow daily thaw can be ideal. We had Tower Ridge in ace condition that morning, with consolidated footsteps to follow. There was a greater build up that year, though. However, at the back end of the season a couple of years ago we did Good Friday Climb on a similar forecast.
It is entirely possible that there will be good conditions up high, and with sunny weather and light winds it could be a great time to be on the hill. just be aware that there might not be a huge thickness of ice. I would say get your kit and partner ready, and make a call later in the week. A lot can change up here in a few days.