National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Ephraim-Gibraltar Airport (K3D2)

Lat: 45.14°NLon: 87.19°WElev: 773ft.

Overcast

55°F

13°C

Humidity 91%
Wind Speed Calm
Barometer 29.89 in
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 13 Oct 7:35 pm CDT
Extended Forecast for

Sister Bay WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 48. Northwest wind 6 to 8 mph.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 57. North wind 8 to 10 mph.

    High: 57 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43. East northeast wind 6 to 8 mph.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers likely after 1pm. Mostly cloudy, with a high near 57. Southeast wind 3 to 6 mph. Chance of precipitation is 60%.

    High: 57 °F

    Mostly Cloudy
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers, mainly before 1am. Low around 42. Light and variable wind becoming northwest 16 to 21 mph in the evening. Winds could gust as high as 28 mph. Chance of precipitation is 80%.

    Low: 42 °F

    Showers

  • Friday

    Friday: A 40 percent chance of showers before 1pm. Partly sunny, with a high near 53. Windy.

    High: 53 °F

    Chance
    Showers and
    Windy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 36. Breezy.

    Low: 36 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Saturday

    Saturday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 40.

    Low: 40 °F

    Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 48. Northwest wind 6 to 8 mph.
Wednesday
Partly sunny, with a high near 57. North wind 8 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 43. East northeast wind 6 to 8 mph.
Thursday
Showers likely after 1pm. Mostly cloudy, with a high near 57. Southeast wind 3 to 6 mph. Chance of precipitation is 60%.
Thursday Night
Showers, mainly before 1am. Low around 42. Light and variable wind becoming northwest 16 to 21 mph in the evening. Winds could gust as high as 28 mph. Chance of precipitation is 80%.
Friday
A 40 percent chance of showers before 1pm. Partly sunny, with a high near 53. Windy.
Friday Night
Partly cloudy, with a low around 36. Breezy.
Saturday
Sunny, with a high near 56.
Saturday Night
Clear, with a low around 40.
Sunday
Sunny, with a high near 60.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 61.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sister Bay WI
 45.19°N 87.12°W (Elev. 630 ft)
Last Update:
4:56 pm CDT Oct 13, 2026
Forecast Valid:
7pm CDT Oct 13, 2026-6pm CDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation