Centuries ago, mariners, explorers and others relied on stormglasses to predict the weather. Crystals form in a liquid that is sealed within a glass cylinder; with a little practice, you can read changes in the crystals to predict a range of weather up to 48 hours in advance. For example, clear liquid in the glass indicates sunny conditions ahead, while the appearance of fern-like crystals means a storm is on the way.

This one is made by Weems & Plath, manufacturer of nautical instruments since 1928. The liquid is based on a formula developed by Admiral FitzRoy, commander of the HMS Beagle on Darwin’s 1831 voyage to the Galapagos Islands. The supplied instructions are drawn from FitzRoy’s observations, linking certain crystal formations and various weather types. The glass chamber is held within a turned brass housing with a durable lacquer coating. About 6 1/2" tall, it comes with a freestanding base as well as fittings for wall-mounting, and is supplied in a form-fitting black leatherette gift box.

Although you can use this device to impress friends with your uncanny ability to predict the weather without consulting the Internet, keep in mind that its 17th-century technology is no match for modern-day meteorological instruments. Provides a unique glimpse into history.

Lifetime warranty.

Product Availability At All Stores


Item Added to your cart

{{ products.length }} Items Added to your cart

Items in your cart

Product Title



QTY: 0


Notify Me When Back In Stock

Get notified via email when this item is back in stock online.

Invalid email address


You’ll receive a one-time email when this item is back in stock online. We won’t share your address with anybody else.

Share On Facebook Share via Email


Sign In

User Name is a required field.

Password is a required field.

Forgot password? Forgot Username?

Benefits of creating an account:

Create an account

Please enter the username associated with your Lee Valley account and we will send you an email to reset your password.

Please enter the email address associated with your Lee Valley account and we will send you an email with your username.