Alpena & Thunder Bay, MI

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Lighthouse at the Alpena Marina

Today’s Forecast:

☀
59°F
High: 65° | Low: 47°
Current Temperature
Clear
Station: KAPN
Observed at: 10:50 am CDT on 9/25/26
Wind: 0 mph | Humidity: 77%

This Afternoon:Mostly sunny, with a high near 65. South wind 0 to 5 mph.
Tonight:Patchy fog after 9pm. Mostly clear, with a low around 47. North wind 0 to 5 mph.
Saturday:Patchy fog before 10am. Sunny, with a high near 66. North wind 0 to 5 mph.

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Today’s Report:

⛵ Boating

Excellent
  89 /100

Ideal conditions for boating. Comfortable temperature (high near 65°F), light wind, and clear forecast.

  • Temp: Marginal weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 89/100
Ideal conditions for boating. Comfortable temperature (high near 65°F), light wind, and clear forecast.

🛶 Paddling

Excellent
  89 /100

Ideal conditions for paddling. Comfortable temperature (high near 65°F), light wind, and clear forecast.

  • Temp: Marginal weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 89/100
Ideal conditions for paddling. Comfortable temperature (high near 65°F), light wind, and clear forecast.

🥾 Hiking

Excellent
  100 /100

Ideal conditions for hiking. Comfortable temperature (high near 65°F), light wind, and clear forecast.

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 100/100
Ideal conditions for hiking. Comfortable temperature (high near 65°F), light wind, and clear forecast.

🐟 Fishing

Excellent
  100 /100

Ideal conditions for fishing. Comfortable temperature (high near 65°F), light wind, and clear forecast.

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 100/100
Ideal conditions for fishing. Comfortable temperature (high near 65°F), light wind, and clear forecast.

About Alpena & Thunder Bay

Alpena & Thunder Bay is a northeast Michigan gateway for Lake Huron shoreline, shipwreck-focused boating, paddling, trails, parks, and quieter outdoor weekends. The bay setting makes weather planning essential because wind, fog, waves, and storm timing can change water plans fast. It is a good destination for flexible days that combine shoreline, trail, and town options.

Make the Most of a Alpena & Thunder Bay Day

Use marine conditions to decide whether the day belongs on the water or along the shore. Calm, clear periods favor boating, kayaking in appropriate areas, and beach walks, while breezy or foggy weather is better for trails, overlooks, and town-based stops. Keep thunderstorm timing in mind before heading to exposed beaches or launches.

Weather Tips for Alpena & Thunder Bay

  • Thunder Bay can become choppy with persistent wind, which affects small craft and paddling comfort.
  • Fog can reduce visibility on the water and along the shoreline.
  • Cool lake air can make spring and fall walks feel colder than inland forecasts.
  • Storms should move plans away from beaches, docks, and open water immediately.

Plan Around the Conditions

Use the forecast as a way to choose the best version of Alpena & Thunder Bay, not as a simple yes-or-no answer. Match the wind, rain timing, temperature, and water or trail conditions to the activity that gives your group the safest and most comfortable day.

7-Day Forecast for Alpena & Thunder Bay

☀
59°F
High: 65° | Low: 47°
Current Temperature
Clear
Station: KAPN
Observed at: 10:50 am CDT on 9/25/26
Wind: 0 mph | Humidity: 77%
Fri ⛅
65° 47°
2%
Sat 🌫
66° 51°
0%
Sun ☀
66° 50°
0%
Mon ☀
67° 49°
0%
Tue ☀
70° 55°
2%
Wed 🌧
67° 54°
42%
Thu 🌧
68° 53°
31%

7-Day High Temperature Trend

65° Fri 66° Sat 66° Sun 67° Mon 70° Tue 67° Wed 68° Thu

7-Day Low Temperature Trend

47° Fri 51° Sat 50° Sun 49° Mon 55° Tue 54° Wed 53° Thu

📊 7-Day Outdoor Outlook

Good Fair Poor 100 Fri 100 Sat 100 Sun 100 Mon 100 Tue 95 Wed 95 Thu
Forecast data from the National Weather Service  |  Last Updated: September 25, 2026 3:17 pm CDT