Skip to content

The brass Sorensen Stormglass is a mysterious weather predictor that is made by the Danish company, E.S. Sorensen. Versions of the stormglass have been in use by sailors since the mid 1700‘s.

Admiral Fitzroy, the famous sailor and meteorologist, used a similar instrument aboard the HMS Beagle during his historic voyage with Charles Darwin in the 1830’s. After 250 years, how the Stormglass works is still a mystery, but it is believed that it has to do with the electromagnetic changes caused by weather and sun storms.

The appearance of different crystal structures inside the sealed glass chamber indicates changes in the weather two days in advance. The glass chamber is encapsulated in a beautifully crafted polished brass cylinder. It can be displayed freestanding or mounted to a boat bulkhead or wall using a mounting bracket that can be purchased separately (ES 55 02 01).

  • Predicts weather up to 48-hours in advance
  • Crystals precipitate in unique formations based on impending weather
  • Sealed glass chamber holds mysterious ingredients
  • Polished brass cylinder
  • Display freestanding
  • Can be mounted to a boat bulkhead or wall using a brass hook (ES 55 02 01) sold separately


WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov.

  • Length: 5.7 in (14.48 cm)
  • Width: 1.4 in (3.56 cm)
  • Height: 1.4 in (3.56 cm)
  • Weight: 1 lb (3.56 cm)
  • UPC Code: 5711403004810
  • HTS Code: 9025.80.1500

Shipping is fast and FREE across the USA. For more details about shipping see the full shipping page here.

We offer 30 Day Easy Returns. If you decide you don't need a product we'll take it back so long as it is in original and re-saleable condition. See the full details here.

Found a better price online? We'll match it or beat it if we can. 

All you need to do is let us know via phone or email (sales@weatherscientific.com) and we'll let you know what we can do.

You will need to provide evidence of the better price online and it must include any shipping or taxes charged by that site. I.e. It needs to be the total price.

This only applies to new products, it does not apply to used condition products.