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Mariana Islands

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Mariana Islands Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Mariana Islands year round climate

  • Spring (March–May): Average 27.1–28.0°C, warm and humid climate, rainfall gradually increases, with the most rainfall in May. Common activities: Diving, snorkeling, beach relaxation. Recommended clothing: Light and breathable short-sleeved clothing, shorts, swimwear, and a light sun-protective jacket.
  • Summer (June–August): Average 27.5–27.9°C, hot and humid, with significant rainfall. Common activities: Water activities, viewing tropical plants, island exploration. Recommended clothing: Light and breathable cotton clothing, shorts, sandals, sunscreen, and rain gear.
  • Autumn (September–November): Average 27.3–27.8°C, warm and humid climate, with the most rainfall in September, gradually decreasing in October and November. Common activities: Diving, snorkeling, whale watching (depending on the season and species). Recommended clothing: Light and breathable clothing, and a light jacket for occasional rain.
  • Winter (December–February): Average 26.7–27.5°C, warm and comfortable climate, with relatively less rainfall. Common activities: Diving, snorkeling, sightseeing. Recommended clothing: Light and breathable clothing, but a light jacket may be needed at night.

Mariana Islands climatological average

Annual average temperature: approx. 27°C / Annual rainfall: approx. 2758 mm / Summer humidity: 75%–85% / Rainiest month: September

Mariana Islands monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
26.7°C
188.3
February
26.8°C
75.3
March
27.1°C
79.3
April
27.6°C
143
May
28°C
316
June
27.9°C
185.7
July
27.6°C
253.3
August
27.5°C
368.3
September
27.6°C
428.3
October
27.3°C
405.3
November
27.8°C
155
December
27.5°C
161

Mariana Islands weather for the next seven days

3/5
Thursday
Patchy rain nearby
28°C/25.7°C
3/6
Friday
Moderate rain
27.4°C/25.4°C
3/7
Saturday
Heavy rain
25.9°C/25.1°C
3/8
Sunday
Heavy rain
25.8°C/25°C
3/9
Monday
Heavy rain
27.6°C/25°C
3/10
Tuesday
Moderate rain
27°C/25.9°C
3/11
Wednesday
Moderate rain
27.3°C/25.7°C

Mariana Islands Frequently Asked Questions and Useful Information for Travel

Can you vacation in the Mariana Islands?

The Mariana Islands offer a perfect blend of outdoor adventures and relaxation, ideal for beach and sports vacations. Enjoy golfing at scenic courses, indulge in resort amenities, and explore shopping options.

Can U.S. citizens travel to the Northern Mariana Islands?

A U.S. passport is not required to enter the Northern Mariana Islands. A visa is not required for U.S. citizens.

How do you get to the Mariana Islands?

Saipan, the largest island in the Mariana Islands, is easily accessible via direct flights from Japan, Korea, Hong Kong, and Guam. Visitors can enjoy seamless travel to this tropical paradise. Additionally, daily flights from Guam make it a convenient connection.

Is Saipan good for vacation?

Yes, Saipan is worth visiting for its beautiful natural scenery, including stunning beaches and diving spots like The Grotto, and its historical sites from World War II, such as the Last Command Post. It offers a unique escape, particularly for those interested in outdoor activities like snorkeling, diving, and hiking, though it is less developed than nearby Guam. However, a visit to Saipan is not without potential drawbacks, including a higher risk of petty crime and concerns about beach water quality.

Who should visit Saipan?

The island's marine life, reefs, and underwater caves like The Grotto make it a top destination for divers. Visitors can enjoy hiking through jungles, exploring beautiful beaches, and visiting natural attractions like Managaha Island. The historical significance of Saipan as a battleground in WWII offers sites such as the Last Command Post and Banzai Cliff.