Home › Weather › Weather Saint John New Brunswick
Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Northern Focus Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Layer up and keep a rain jacket handy today: the live forecast above shows Saint John’s classic mix of cloud, wind and occasional showers, typical for this maritime city where weather can shift quickly off the Bay of Fundy.
Will fog be an issue?
Yes—fog is a hallmark of Saint John’s weather, especially in spring and early summer when warm air meets cold ocean water. The live forecast above may indicate reduced visibility, so if you’re driving or walking near the harbour, slow down and use low-beam headlights. Fog often clears by midday but can return quickly in the evening.
How do winters compare to other Canadian cities?
Saint John winters are milder than inland cities like Calgary or Edmonton, but they bring plenty of snow, ice and freezing rain. Temperatures hover around –2°C to –10°C, kept in check by the Bay of Fundy’s moderating influence. The real challenge is the wind chill and frequent storms off the Atlantic, so a wind‑proof parka and boots are essential.
Does Saint John really have the most fog in Canada?
It’s one of the foggiest cities, averaging over 100 days of fog per year. The collision of the warm Gulf Stream with the cold Labrador Current just offshore creates ideal conditions, especially from May through August.
What’s the best time to visit for clear skies?
Late summer (August to early September) offers the most stable weather, with warm days, lower humidity and fewer foggy mornings. September also sees the tail end of hurricane season, so it’s wise to check the live forecast before heading out.
Are there weather warnings I should watch for?
Yes—winter storm, freezing rain, blizzard and fog warnings are common. Marine warnings also affect the Bay of Fundy. The live forecast above and our weather warning page keep you updated.
For broader conditions across the country, visit our Canada weather hub or compare with Toronto weather.