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

Hazardous Weather Conditions

Current conditions at

Ephraim-Gibraltar Airport (K3D2)

Lat: 45.14°NLon: 87.19°WElev: 773ft.

Fair

73°F

23°C

Humidity 69%
Wind Speed SW 7 G 18 mph
Barometer 29.76 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 12 Sep 10:35 am CDT
Extended Forecast for

Sister Bay WI

  • Today

    Today: Partly sunny, with a high near 77. Southwest wind 7 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 77 °F

    Partly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 55. North northwest wind 7 to 9 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 67. Northwest wind 9 to 13 mph, with gusts as high as 18 mph.

    High: 67 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 52. North northwest wind 5 to 10 mph.

    Low: 52 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 68. Light and variable wind becoming south 6 to 11 mph in the afternoon.

    High: 68 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Showers, with thunderstorms also possible after 10pm. Low around 58. Breezy. Chance of precipitation is 100%.

    Low: 58 °F

    Showers and
    Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 77. Southwest wind 7 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.
Tonight
Increasing clouds, with a low around 55. North northwest wind 7 to 9 mph.
Sunday
Partly sunny, with a high near 67. Northwest wind 9 to 13 mph, with gusts as high as 18 mph.
Sunday Night
Mostly clear, with a low around 52. North northwest wind 5 to 10 mph.
Monday
Increasing clouds, with a high near 68. Light and variable wind becoming south 6 to 11 mph in the afternoon.
Monday Night
Showers, with thunderstorms also possible after 10pm. Low around 58. Breezy. Chance of precipitation is 100%.
Tuesday
Partly sunny, with a high near 73.
Tuesday Night
Partly cloudy, with a low around 54.
Wednesday
Partly sunny, with a high near 69.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 55.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 70.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 54.
Friday
A 20 percent chance of showers. Sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sister Bay WI
 45.19°N 87.12°W (Elev. 630 ft)
Last Update:
8:41 am CDT Sep 12, 2026
Forecast Valid:
10am CDT Sep 12, 2026-6pm CDT Sep 18, 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