Channel Islands in April

April through June is prime time. Wildflowers carpet the islands in spring colors, and the weather stays mild before summer crowds arrive. September and October offer the calmest seas and warmest water for snorkeling - visibility can reach 100 feet on good days. Summer gets busy and windy, with afternoon gusts that can cancel boat trips. Winter brings dramatic storms and rough seas, but also solitude and migrating whales. Island Packers reduces schedules November through March, so check ahead. Sea conditions matter more than land weather here. A calm 60-degree day beats a sunny 75-degree day with choppy seas. The boats will turn back if swells get too big, leaving you stranded on the dock in Ventura. Check marine forecasts before booking, and always have backup plans.