Alert

Frost Advisory Issued by Environment Canada For Early Wednesday Morning

By Eddie Sheerr·September 22, 2026 · 12:29 PM

---

Environment Canada has issued yellow-level frost advisories for a large portion of central, northeastern and western Newfoundland, with patchy frost expected to develop early Wednesday morning.

The advisories cover:

• Deer Lake – Humber Valley

• Buchans and the interior

• Grand Falls-Windsor and vicinity

• Green Bay – White Bay

• Bay of Exploits

• Bonavista North

• Gander and vicinity

• Bonavista Peninsula

• Terra Nova

• Clarenville and vicinity

• Northern Peninsula East

Clear skies, light winds and cool temperatures will allow frost to develop overnight, particularly in low-lying inland areas.

Temperatures across the advisory area are expected to fall into the -1°C to +5°C range, with the coldest readings most likely in sheltered and low-lying locations. Coastal areas will generally remain a little milder.

The greatest potential for freezing temperatures will be across parts of the west, central Newfoundland and the Northern Peninsula, where temperatures could fall as low as -1°C.

Farther east, including Gander, Terra Nova, the Bonavista Peninsula and the Clarenville area, overnight lows will generally range from around 2°C inland to 5°C near parts of the coast.

Frost could damage sensitive plants, trees and crops, particularly in areas where temperatures fall close to or below freezing. The frost is expected mainly early Wednesday morning, before temperatures begin to rise after sunrise.

Also keep in mind that frost can occur outside of the warned areas, and the image below should help show you where the risk is on the periphery. If you have plants and vegetation sensitive to cold weather, this map could prove very useful!

---

Don’t forget to…

📱 Get the Sheerr Weather App in the Apple App Store and Google Play Store.

🗺️ Check out the Map Room to see all the latest weather observations for the Province.

🎥 Check out the Provincial Highway Cams to see 👀 what’s going on around our highways and byways!