Weather in Saipan

Stay up to date with the current weather situation on the island of Saipan. Here you will find the latest data and detailed forecasts to help you better plan your day.

Saipan, located in the Northern Mariana Islands, welcomes travellers with a classic tropical climate. The weather here is surprisingly stable: eternal summer reigns on the island, and temperature fluctuations throughout the year are minimal. The average air temperature confidently holds at a comfortable mark of around +26…+28°C, making this destination ideal for beach holidays and water sports in almost any season.

Conventionally, the year can be divided into two periods differing in rainfall. From January to May is the drier season, when rain falls less often and the sun shines more frequently, creating excellent conditions for excursions. From June, humidity begins to rise, and the rainy season arrives, peaking in August, September, and October. In these months, the number of rainy days is maximal (up to 30 days in August); however, these are often short-lived warm downpours that are quickly replaced by clear weather.

A characteristic feature of Saipan's climate is that the concept of "cold" is practically non-existent here. Even in the coolest months, such as February, the night temperature rarely drops below +25°C. Tourists should be prepared for high humidity and periodic rainfall at any time of the year, but thanks to fresh sea breezes, the heat is tolerated quite easily.

The temperature regime on Saipan is distinguished by amazing stability throughout the year, making the island an attractive destination for lovers of warmth regardless of the season. The annual temperature range is minimal: the difference between the "coldest" and hottest month is less than one and a half degrees. The coolest period can conditionally be considered February with an average figure of 26.5°C, while the peak heat falls in June, when the air warms up on average to 27.9°C.

Summer months and the beginning of autumn are characterized by consistently high temperatures. In June, maximum values reach 29.0°C, creating conditions for a classic tropical holiday. The winter period in the Northern Mariana Islands passes very mildly: in January and December, the average temperature holds at the level of 26.6°C — 27.4°C. There are no frosts or sharp cold snaps here, so the concept of "winter" here refers more to the calendar than to real weather sensations.

A feature of Saipan's climate is the extremely insignificant diurnal temperature fluctuations. The difference between daytime highs and nighttime lows is very small, often amounting to just 1–2 degrees. For example, in August, the night temperature (about 26.5°C) practically does not differ from the daytime (up to 28.7°C). This ensures a comfortable atmosphere around the clock: even after sunset, the air remains warm and pleasant, sparing tourists the need to bring warm clothes for evening walks.

Precipitation on Saipan is distributed unevenly throughout the year, forming distinct wet and dry seasons. Since the island is located in the tropics, there is only rain here; snow does not fall. The rainiest period is the second half of the year: the maximum amount of precipitation (up to 13 mm) and a record number of inclement days occur in August and October.

Tourists who prefer clearer weather are recommended to plan their trip for the first half of the year. The period from January to April is considered the most comfortable: the number of days with precipitation holds at the level of 15 per month. The driest month is March, when the rainfall level is minimal (about 1 mm). However, even in the "dry season", it is worth being prepared for short-term tropical downpours.

From May to November, the rainy season lasts in the Northern Mariana Islands. During this period, the probability of precipitation is very high: while in the transitional months (May and November) 19 to 22 rainy days are recorded, in the peak of the season — from July to October — it rains almost daily (28–30 days per month). Precipitation often has an intense downpour character, but thanks to the warm climate, it rarely causes serious discomfort, often quickly being replaced by the sun.

Since the climate on Saipan remains hot and tropical all year round with an average air temperature of about +27°C, the basis of your luggage should be light summer clothing. Give preference to natural breathable fabrics, such as cotton and linen, which will help tolerate high humidity more easily. T-shirts, shorts, light dresses, and sundresses will be relevant in any month. Be sure to bring a wide-brimmed hat and high-quality sunglasses, as the equatorial sun here is very active.

When planning a trip, pay attention to the seasonality of precipitation. From July to October, the rainy season is observed on the island: for example, in August, it can rain almost daily. During this period, as well as in November, be sure to put a light rain poncho or a compact umbrella in your suitcase. Footwear should be not only comfortable but also quick-drying; flip-flops are perfect for a beach holiday, and for excursions to historical sites and jungles — light sneakers or trekking sandals.

Do not forget about skin protection: water-resistant sunscreen with a high SPF factor (50+) is an essential item. Despite the eternal summer outside, powerful air conditioners often operate in shopping centres and hotels, so a light long-sleeved cardigan or a stole will be useful for staying comfortably indoors. It is also worth considering that even in the "dry" months (from January to May), short-term tropical downpours are possible, so a waterproof case for your phone and documents will not be an unnecessary accessory.