2026 Current Conditions

Our weekly monitoring and updates are officially underway for the 2026 season!

7/15/2026:

Lake Winnisquam continues to offer excellent conditions for summer recreation, and this week's monitoring indicates the lake remains healthy and resilient.

Surface water temperatures are now just below 80°F, providing ideal conditions for swimming, paddling, boating, and other summertime activities. Following a stretch of dry weather and reduced recreational activity after the busy Fourth of July holiday, water clarity improved compared to last week. Lake levels have also returned to a level that is typical for this time of year.

WWN is pleased to report that there have been no reports of cyanobacteria blooms and no beach advisories on Lake Winnisquam. Our staff and volunteers continue to monitor water quality each week, collecting data on temperature, water clarity, lake stratification, plankton communities, and other key indicators of lake health. This ongoing monitoring allows us to track seasonal changes and identify potential concerns early.

If you are interested in becoming involved with water quality monitoring or other volunteer stewardship opportunities, we encourage you to contact WWN. Community volunteers play a vital role in helping preserve and protect Lake Winnisquam and its watershed for future generations.

While these weekly updates often focus on scientific observations, they also remind us why protecting Lake Winnisquam matters. A healthy lake provides countless benefits to our community, from swimming, boating, paddling, and fishing to supporting wildlife, providing clean water, and offering a place to relax, reconnect, and create lasting memories with family and friends.

The continued health of Lake Winnisquam is the result of many people working together. Every lake-friendly action, whether it's cleaning, draining, and drying your boat, reducing runoff from your property, minimizing wake near shorelines, or respecting wildlife, helps preserve this incredible resource for future generations.

As you enjoy the lake this summer, we encourage you to take a moment to appreciate everything it provides. Together, we can ensure that Lake Winnisquam remains a healthy, vibrant, and welcoming place for generations to come.

Helpful links for current conditions:
For real-time lake level information, visit NHDES' Real-Time Data and Information page
For current advisories, watches, and warnings visit NHDES' Healthy Swimming Mapper.

Stay informed, stay safe, and check your inbox for your weekly water quality updates. Follow us on social media to stay updated on what’s happening around the lake.