Sailing on Lake Superior THUNDER BAY – WEATHER DESK – Friday, September 25, 2026 – Thunder Bay will experience a mild and fluctuating three-day weather pattern. Friday starts off cloudy with a chance of some early showers, Saturday will see improvements after morning fog lifts, and Sunday will bring a mix of sun and clouds along with another possibility of showers. According to Environment and Climate Change Canada (ECCC), it was cloudy and 12 C at Thunder Bay Airport at 5:07 a. m. on Friday. A southwest wind was blowing at 5 km/h, humidity was at 100 per cent, and visibility stretched to 24 kilometres.
Weather Alerts and Current Conditions
No ECCC weather warnings or advisories were in effect for Thunder Bay at the time this report was made. Be aware that alerts can change rapidly, particularly when fog rolls in overnight. It’s best to check the ECCC public alerts page before you travel or start any outdoor activities.Friday, September 25: Cloudy with Mild Temperatures
This Friday is expected to be cloudy with an early chance of showers at about 30 per cent. The high temperature will reach around 21 C, feeling like 25 due to the Humidex. The UV index is set at a moderate level of 3. As Friday night approaches, expect partly cloudy skies. Fog patches are likely to develop during the evening hours, with temperatures dropping to around 10 C.Saturday, September 26: Morning Fog Clearing Up
On Saturday morning, it will start mostly cloudy but the fog should lift by mid-morning. Skies are predicted to clear around noon. The day’s high temperature will hit about 18 C with a moderate UV index of 5. Saturday night will have some cloud cover along with a low near 9 C.Sunday, September 27: Sun Mixed With Clouds and Shower Chances
This Sunday is looking like a blend of sunshine and clouds coupled with a potential for showers at about a 30 per cent chance. The expected high remains around 18 C while Sunday night stays partly cloudy with similar chances of rain and lows near 8 C.Three-Day Forecast Overview
Day Forecast High Overnight Friday, Sept. 25 Cloudy; 30% chance of early showers 21 C; Humidex 25 Partly cloudy; fog patches; 10 C Saturday, Sept. 26 Mainly cloudy; clearing near noon; morning fog patches 18 C Cloudy periods; 9 C Sunday, Sept. 27 Mix of sun and cloud; 30% chance of showers 18 C Cloudy periods; 30% chance of showers; 8 CWind Conditions for Travel
The latest public forecast from ECCC does not include detailed wind speeds or gusts for Friday through Sunday. Current observations show winds from the southwest at about 5 km/h. If you’re planning travel or outdoor events sensitive to wind conditions, it’s advisable to check the hourly forecast prior to heading out. The main concern for travelers is fog which could limit visibility late Friday night into Saturday morning especially near the airport as well as rural roads and low-lying areas like bridges. Drivers should reduce speed when necessary use low-beam headlights while maintaining extra following distances on wet pavement potentially caused by rain earlier in the day or on Sunday afternoon-there’s no significant risk from snow or freezing rain anticipated though. If you’re working outdoors make sure you have rain gear handy dress in layers during those cooler mornings secure any lightweight equipment if winds pick up unexpectedly too! Anyone thinking about hiking camping trips must prepare adequately for moist conditions while being cautious regarding limited visibility just before dawn hours too!Air Quality Status: Low Risk Level
The latest Air Quality Health Index forecast from ECCC indicates levels reaching up to only maximum two which represents low risk throughout today tonight tomorrow evening respectively! Under these circumstances general public can continue their normal outdoor routines without worry however folks who may suffer from heart lung issues should adhere closely their health plans monitor symptoms accordingly! Please remember real-time air quality readings may sometimes vary thus always refresh forecasts before publishing articles keep an eye out next bulletin regarding Sunday updates too!Marine Forecast for Western Lake Superior
No strong wind warnings have been reported by ECCC marine bulletins since they issued one earlier this morning covering specific areas such as Eastern Lake Ontario instead! Winds over western part predictably come southward upwards ten knots then transition lighter shortly after dawn followed by southeast directions equally around same strength later Saturday AM-but note these remain offshore currents! Always beware local variations influenced shoreline effects.” Waves currently listed aren’t available so boaters shouldn’t assume calm waters based solely missing figures-they need review upcoming marine updates alongside local info prior setting sail! Lastly visibility restrictions due dense fog haven’t been explicitly stated however they classify anything below mile radius considered hazardous adjust according safely upon changing situations particularly closer shores harbors entrances throughout outings! Extended wind outlook covers only until end weekend-no Monday forecasts yet confirmed so stay tuned follow scheduled briefings coming soon right here tomorrow AM!Your Harbor Safety Reminder: Different From Open Water
Thunder Bay Harbor offers shelter against rougher conditions open lakeside yet wind patterns might still sweep through channels create potential hazards navigating outside breakwaters which often appear calm despite actual risks involved. Even if southward gusts hover merely ten knots isn’t deemed severe conditions can escalate quickly given cold temperatures present within waters requiring utmost caution especially small crafts including kayaks paddleboards should remain close shore equipped properly safety gear communication devices enough time return homewards safely.” Make sure double-check latest predictions right prior departure share routes planned beforehand others let them know whereabouts during adventures ahead!”Checked Sources:
Environment & Climate Change Canada Thunder Bay airport observation issued five thirty AM EDT September twenty fifth two thousand twenty-six. ECCC public weather alerts checked earlier this morning. ECCC Thunder Bay Air Quality Health Index release six AM EDT September twenty fifth two thousand twenty-six. ECCC Great Lakes marine bulletin FQCN13 CWTO issued three AM EDT September twenty fifth two thousand twenty-six.Source link
