Aug 27, 2015 - 5:55 AM
Meteocentrale.ch certainly has the most accurate forecasts for the region. But it is still hard to predict more than a day or two in advance. Suggest that you look at the forecast a day before and plan your next day accordingly. You are visiting toward the end of the VERY busy summer season so should not find any attractions over-booked.
Bad weather outings:
1. A cruise on Lake Brienz. This can be glorious even in the rain with the drama of the clouds and fog coming in and out over the lake.
2. Ballenberg Museum. Unless it is very windy with lots of rain, an umbrella or hooded rain jacket are all you need to spend a completely delightful day at this wonderful outdoor museum.
3. Trümmelbach Falls in Lauterbrunnen Valley. You are going to get wet in there anyway!
4. Berne is a lovely city with underground shopping arcades so is fine for a misty and cloudy day.