Coming to Kaanapali…Rain Forecasted

We are coming to Maui this Sunday and staying until Friday. There’s a 30-40% chance of rain forecasted everyday we’re there. We are bringing our 2 kids ages 12 and 10. We planned to do mostly beach/water activities. Is our trip gonna be ruined?? Any recommendations for indoor activities near Kaanapali/Lahaina? TIA!