Marshall Islands in January

December through May offers the driest weather and calmest seas — perfect for diving. Trade winds keep temperatures around 82°F, and you'll see maybe 10 rainy days per month. This is peak season, so book flights early. June through November brings more rain and occasional typhoons, but also fewer tourists and slightly cheaper accommodation. The diving is still world-class, just with more surface intervals spent dodging rain squalls. Water temperature stays a consistent 82-84°F year-round, so your wetsuit needs never change.