Thanks all for comments.
The problem actually that there is no service like on Dogger bank to have precise weather for vessels position. As survey vessel we belong to weather condition and it is complicated situation to decide when is time to hide in port. Yes, we cannot do 20 knots and if 1.5 waves catch vessel at sea everyone will be happy )).

In reality 23kt wind 27kt in gust.
Waves 1.2m

But if you look at weather forecast from 25.08 it seems more precise.
The question is why there is a couple of days announced in 26.08 looks good and suddenly not.

In evening updates 27.08 the weather become worse for our position and operation we doing.

In morning 27.08 the weather forecast showed other situation for our position.

The voyage was planned in 26.08.2023 and according the weather was expected to be till 31.08. Vessel have limitation 0.8m for waves and 10m/s wind.

I will try to clarify:

the weather forecast in four days before required date announced more precise information.
In two days before required date coming the weather forecast melted.
In required date the wether forecast shows information same as four days ago.
In result the wave from 1,5m decreasing to 0,5 and again increased to 1,5m…
Wind jumped from 12m/s to 5m/s and back to 12!
something wrong with information during the last month and become difficult to plan voyages with Windy.