var currentDate = moment('2015-10-30');
var futureMonth = moment(currentDate).add(1, 'M');
var futureMonthEnd = moment(futureMonth).endOf('month');
if(currentDate.date() != futureMonth.date() && futureMonth.isSame(futureMonthEnd.format('YYYY-MM-DD'))) {
futureMonth = futureMonth.add(1, 'd');
}
console.log(currentDate);
console.log(futureMonth);
EDIT
moment.addRealMonth = function addRealMonth(d) {
var fm = moment(d).add(1, 'M');
var fmEnd = moment(fm).endOf('month');
return d.date() != fm.date() && fm.isSame(fmEnd.format('YYYY-MM-DD')) ? fm.add(1, 'd') : fm;
}
var nextMonth = moment.addRealMonth(moment());