Best time, to visit Sequoia. June. The best time to visit Sequoia National park is June through August when the weather is most steady in that time. Also, the busiest month for tourism is Sequoia National park in June But, Costs for lodgings and flights will be most costly during these months, So, in spite of the fact that you’ll be able to save if you buy well in progress. … [Read more...] about Best time to visit a Squoia and Kings National park.