Mostly grey clouds linger over Thunder Bay Saturday, with brief damp spells at dawn. The lake keeps shoreline temps cool while clouds stick around. Sunday brings sharp sun breaks inland. waterside breeze lingers than inland areas warm faster. Monday brings notable warm-up inland as the heat wave peaks away from Superior. waterside stays mild while inland spots bake. Local forecasters issued this outlook on July 12, 2026. A sunny Sunday follows the week’s damp start.