Saipan Weather
A month-by-month look at temperature, rainfall and what to pack in Saipan. The annual average is 30°C high / 25°C low — hottest in May (31°C) and coldest in January (24°C).
Saipan Weather at a Glance
As of 2026A quick summary of Saipan's year-round climate and the best time to visit.
- Annual average
- 30° / 25°
- Best time to visit
- January, February, March
- Hottest month
- May (31°C)
- Coldest month
- January (24°C)
- Wettest month
- August (230mm)
- Driest month
- March (70mm)
As of 2026, Saipan's weather averages 30°C high / 25°C low across the year, and the best time to visit for stable temperatures, rainfall and crowds is January, February, March. The hottest month is May (31°C), the coldest is January (24°C), and the wettest is August (230mm).
When is the best time to visit Saipan?
January is one of the best months to visit Saipan: dry-season trade winds, warm 24-29°C days, and a sea around 27°C ideal for snorkeling and diving. Rain is lighter and more often brief. This is peak-season weather, so it overlaps the busiest and priciest stretch around New Year. Book ahead, especially given Saipan's reduced flight schedule. Dive visibility is generally good and the Grotto is at its best on calm mornings. Managaha's lagoon is calm and beginner-friendly. UV is high year-round near the equator, so reef-safe sunscreen and shade matter even on breezy days. The trade winds keep it comfortable despite the heat.
February is one of Saipan's driest, sunniest months — warm 24-29°C days, light rain, and steady trade winds. Excellent for beaches, snorkeling, and diving. Dive visibility is typically strong this month, and the Grotto and outer reefs reward calm mornings. Managaha's lagoon stays calm and clear. It remains peak season, so prices and demand are high; book early given the thin flight schedule. UV is high, so reef-safe sunscreen and shade are essential even when the breeze keeps things feeling pleasant.
March is arguably the best month for weather: warm 24-30°C days, the least rain of the year, abundant sun, and calm seas. Ideal for every water activity. Dive conditions are at their best, with strong visibility at the Grotto and outer reefs and calm crossings to Managaha. It's a popular window, so prices stay firm; the island is at its most reliable for sunshine. With UV at 11, sun protection is non-negotiable — reef-safe sunscreen, hat, and shade between swims.
What is Saipan weather like month by month?
Tap any month for a detailed guide with what to wear, sunrise/sunset and air quality.
| Month | High/Low | Rain | Rainy days | Crowds | |
|---|---|---|---|---|---|
| January | 29° / 24° | 110mm | 11 | Busy | Details → |
| February | 29° / 24° | 80mm | 9 | Busy | Details → |
| March | 30° / 24° | 70mm | 8 | Busy | Details → |
| April | 30° / 25° | 80mm | 8 | Moderate | Details → |
| May | 31° / 25° | 120mm | 11 | Moderate | Details → |
| June | 31° / 25° | 130mm | 13 | Quiet | Details → |
| July | 31° / 25° | 180mm | 16 | Moderate | Details → |
| August | 31° / 25° | 230mm | 18 | Moderate | Details → |
| September | 31° / 25° | 220mm | 18 | Quiet | Details → |
| October | 31° / 25° | 200mm | 17 | Quiet | Details → |
| November | 30° / 25° | 150mm | 14 | Moderate | Details → |
| December | 29° / 24° | 120mm | 12 | Busy | Details → |
What should you wear in Saipan?
Warm tropical, end of dry season. Light clothing, swimwear, reef-safe SPF 50, hat. A modest layer for memorials.
Hot, very humid, wet. Light quick-dry clothing, swimwear, reef-safe SPF 50, a reliable rain jacket, and water shoes.
Hot, wet, humid. Light quick-dry clothing, swimwear, reef-safe SPF 50, a rain jacket, and water shoes.
Dry-season warmth. Light clothing, swimwear, reef-safe SPF 50, hat, and sunglasses. A modest layer for the WWII memorials and a light wrap for boats.
Saipan Weather FAQ
What is the best time to visit Saipan? +
For weather, January, February, March are the most comfortable months. Highs sit around 29°C with relatively stable rainfall and crowds.
What are the hottest and coldest months in Saipan? +
The hottest month is May with an average high of 31°C, and the coldest is January with an average low of 24°C. The annual average is 30°C high / 25°C low.
When does it rain most in Saipan? +
The wettest month is August (230mm over about 18 rainy days) and the driest is March (70mm). Total annual rainfall is roughly 1690mm.
What should I pack for Saipan? +
Spring (Mar–May) averages 30/25°C — Warm tropical, end of dry season. Light clothing, swimwear, reef-safe SPF 50, hat. A modest layer for memorials. Summer (Jun–Aug) averages 31/25°C — Hot, very humid, wet. Light quick-dry clothing, swimwear, reef-safe SPF 50, a reliable rain jacket, and water shoes. Autumn (Sep–Nov) averages 31/25°C — Hot, wet, humid. Light quick-dry clothing, swimwear, reef-safe SPF 50, a rain jacket, and water shoes. Winter (Dec–Feb) averages 29/24°C — Dry-season warmth. Light clothing, swimwear, reef-safe SPF 50, hat, and sunglasses. A modest layer for the WWII memorials and a light wrap for boats.
What is the weather in Saipan this month (June)? +
June averages 31°C high / 25°C low with 130mm rainfall over about 13 rainy days. Crowds are quiet and prices are moderate.
Keep Planning Your Saipan Trip
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.