Saipan has a marine subtropical climate and is hot throughout the year. So it is possible to swim all year round. There are mild rainy and dry seasons, and there are squalls in the rainy season from April to October. The typhoon season is also during this period, so the best season is from November to March during the dry season.

Saipan Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Highest Temperature 24 26 26 27 29 28 29 28 27 28 27 26 Lowest Temperature 22 22 22 22 23 23 24 21 23 23 22 22 Precipitation 159 43 101 176 246 57 101 364 311 302 266 48