Southwestern New Brunswick Weather Forecast — October 24–30, 2026
Weekly Weather Outlook | Southwestern New Brunswick, Canada
Southwestern New Brunswick is heading into a week of changing autumn weather, with sunshine and mild temperatures this weekend followed by a cooler spell early next week.
Sunday looks like the warmest day of the forecast period. Overnight temperatures are expected to fall below freezing in some inland areas, making frost protection important for gardeners.
Weekly Weather Forecast
| Date | Forecast | High | Low |
|---|---|---|---|
| Saturday, October 24 | Sunny, a few clouds | 11°C | -2°C |
| Sunday, October 25 | Mainly sunny and mild | 15°C | 3°C |
| Monday, October 26 | Mix of sun and clouds; slight shower risk | 14°C | 0°C |
| Tuesday, October 27 | Sunny, breezy and cooler | 8°C | -4°C |
| Wednesday, October 28 | Partly sunny | 8°C | -3°C |
| Thursday, October 29 | Sunshine and clouds; afternoon breeze | 12°C | 6°C |
| Friday, October 30 | Sunny spells | 14°C | 2°C |
Temperatures are approximate and based on the Saint John forecast. Conditions may vary across southwestern New Brunswick, especially between coastal and inland communities.
Regional Weather Outlook
Saint John and the Fundy Coast
Saturday and Sunday should bring favourable conditions for outdoor activities, with Sunday expected to be particularly mild. Temperatures will drop early next week before recovering toward Thursday and Friday.
Coastal winds may make conditions feel cooler, especially on exposed waterfront areas.
St. Stephen and Western Charlotte County
Western communities can expect a similar pattern, with a mild Sunday followed by cooler daytime temperatures Tuesday and Wednesday.
Inland locations may experience colder overnight temperatures than the coast. Gardeners should take precautions against frost.
Grand Bay-Westfield, Rothesay and Quispamsis
The Kennebecasis Valley and surrounding communities should see a generally sunny weekend. Early next week will bring cooler weather, with freezing temperatures possible overnight.
Best Day for Outdoor Activities
Sunday, October 25, looks like the best day of the week for outdoor plans.
The forecast calls for sunshine and temperatures around 15°C in Saint John, with potentially warmer conditions in some inland locations.
It should be a good opportunity for a walk, autumn photography, yard work or a drive through the fall landscape.
Gardening and Frost Watch
Cold overnight temperatures are expected early in the week.
Gardeners should consider:
- Covering tender plants before sunset.
- Bringing potted plants indoors where practical.
- Harvesting remaining frost-sensitive vegetables.
- Protecting outdoor water lines and equipment where necessary.
Actual frost conditions will depend on local temperatures, wind and ground conditions.
What to Watch This Week
- Cooler weather arriving Tuesday.
- Overnight temperatures falling below freezing in inland areas.
- A return to milder daytime conditions toward the end of the week.
- Any updated Environment Canada weather alerts.
Official Weather Sources
For the latest forecasts and any weather warnings, consult these sources:
Final Outlook
Southwestern New Brunswick residents can look forward to a pleasant autumn weekend before a sharp cooldown early next week. Sunday is expected to offer the warmest conditions, while Tuesday and Wednesday will bring chilly mornings and cooler afternoons.
Check updated local forecasts before travelling or making outdoor plans, as autumn weather can change quickly.
Forecast prepared October 24, 2026. Temperatures and conditions are subject to change.
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