Islas Marías
Mexico UNESCO World Heritage Site

Islas Marías is an archipelago in Mexico that is part of the Islands and Protected Areas of the Gulf of California. This island group is a UNESCO World Heritage Site.
Planning a visit
The best time to visit is between January and May, when average temperatures are between 22 °C and 24 °C and rainfall is minimal. From June to October, the weather is warmer with average temperatures reaching 27 °C and significantly more rain, particularly in September when there are about 213 mm of rain.
To reach the islands, you can fly to Puerto Vallarta International Airport, which is 153 km away. The archipelago is located about 798 km from Mexico City. The site is one of the 66 sights in Mexico featured on this website and is ranked 49th in popularity among the country's sights by English Wikipedia lookups.
Weather by month
The warmest month is August, averaging 27 °C. The wettest is September, with about 213 mm of rain.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average temperature, °C | 22 | 22 | 22 | 23 | 24 | 26 | 27 | 27 | 27 | 27 | 25 | 23 |
| Rainfall, mm | 30 | 8 | 2 | 1 | 2 | 34 | 117 | 182 | 213 | 100 | 34 | 16 |
| Rainy days | 1 | 2 | 1 | 0 | 1 | 10 | 25 | 30 | 25 | 15 | 3 | 2 |
Temperatures and rainfall: 1981–2010 averages for this spot (4 km grid), from CHELSA. Rainy days: 2015–2024, NASA POWER.