Sign In Become a Member
Live Cams Donate
Blue hill observatory presents

Blue Hill Observatory Climate and Weather Conference

Formerly known as Southern New England Weather Conference, it's a day of ideas, evidence, and conversation about the weather and climate shaping our future. Join scientists, educators, and weather enthusiasts on October 24, 2026, in person or online.

Register Now Explore the Conference
51,738 Unbroken Days
141 Years of Data
2,500+ Youth/Year
A NEW CHAPTER FOR BLUE HILL OBSERVATORY

141 Years. A New Era Begins.

With a new Board of Trustees and a renewed vision for the future, Blue Hill Observatory begins its next chapter, building on 141 years of continuous observation and expanding its impact around the world.

Meet the Trustees Read the Announcement
51,738 Unbroken Days
141 Years of Data
2,500+ Youth/Year
National Historic Landmark · Since 1885

North America's Oldest Continuous Weather Record

Every single day since February 1, 1885 — through wars, storms, and pandemics — someone has climbed Great Blue Hill and recorded the weather.

Support the Record Our Mission
51,738 Unbroken Days
141 Years of Data
2,500+ Youth/Year
Temporary Closure

Vandalism Update and How You Can Help Us

On the evening of June 29, an individual or group vandalized our historic building. The most significant impact occurred in the space that houses 141 years of irreplaceable weather and climate records.

Read More Donate for Repairs
PRESERVE THE PAST • PROTECT THE FUTURE

Save America's Most Important Climate and Weather Record

For more than 141 years, Blue Hill Observatory has preserved one of the world's longest, most complete, and most scientifically valuable continuous weather records. Today, funding cuts threaten the observations that scientists rely on and the historic archives that remain undigitized. Help protect this irreplaceable record before it is lost.

Donate Now Learn more
51,738 Unbroken Days
141 Years of Data
2,500+ Youth/Year

💙 Help Save the Record! We need your support.

Save the Record Now →
How We Serve the Community

Science, Education & Discovery

Climate & Weather

141 Years of Unbroken Climate Data

Our climate and weather records are a unique resource for science research and education. Here you will find official BHO climate information…

Learn more →
Educational Programs

Inspiring the Next Generation of Scientists

The Blue Hill Observatory offers a variety of STEM-focused educational programs including field trips, classroom visits, seasonal programs, and community programs. To…

Learn more →
Events & Webinars

Conferences, Climbs, and Community Programs

Throughout the year, we sponsor many special events and virtual webinars related to our mission of interest to weather professionals, educators, students…

Learn more →
Visit Us

Tour a National Historic Landmark

Plan Your Visit The Blue Hill Observatory welcomes thousands of visitors each year — come for the science, stay for the sweeping…

Learn more →

"The most homogeneous climate record in North America."  —  World Meteorological Organization

From the Observatory

Latest News & Research

See all news →
Current Conditions

Great Blue Hill Today

Sep 28 · 5:19 PM EST

Blue Hill Observatory

Temperature 54.4°F
Wind NNE 10 mph
Gust 24 mph
Humidity 98%
Pressure 29.797"
Vector and R.M. Young Wind Data → View full weather data →
Our Mission

The Last Best Independent Climate Record

As federal science funding erodes, Blue Hill Observatory stands at a crossroads. We hold North America's longest continuous weather record — data that NOAA, NASA, and leading universities rely on. That record doesn't maintain itself.

About Blue Hill Observatory Support Our Work Become a Member
Trusted By
UNITED NATIONS NOAA NASA NATIONAL PARK SERVICE NATIONAL WEATHER SERVICE WORLD METEOROLOGICAL ORG. AM. METEOROLOGICAL SOCIETY MUSEUM OF SCIENCE