Lake Winnebago Forecast

Lake Winnebago Forecast About these forecasts

Forecast Graphics

Lake Winnebago Recreational Forecast
^{Note: Experimental product. Check product creation time to verify this is a current forecast.}

956
SXUS43 KGRB 121427
RECGRB
WIZ048-WIZ049-122100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
927 AM CDT Sun Apr 12 2026

.TODAY...South winds 10 to 20 knots. Patchy fog late in the
morning. rain showers likely late in the morning. Chance of
thunderstorms through the day. Waves 1 to 2 feet. Highs in the
mid 60s.
.TONIGHT...Southwest winds 15 to 20 knots. Patchy fog in the
evening. slight chance of thunderstorms in the evening. Waves
1 to 3 feet. Lows in the mid 50s.
.MONDAY...South winds 5 to 15 knots. Chance of rain showers and
slight chance of thunderstorms in the afternoon. Waves 1 foot or
less. Highs in the upper 60s.
.MONDAY NIGHT...South winds around 10 knots. Rain showers and
chance of thunderstorms in the evening, then chance of rain
showers after midnight. Waves 1 foot or less. Lows in the mid
50s.

$$

Local Observations
^{Note: Check product creation time to verify this is a current product.}

    
                        

316

ASUS43 KGRB 121601

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

1100 AM CDT SUN APR 12 2026



WIZ005-009-010>012-018-019-121700-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       CLOUDY    50  47  89 S13       29.65S

MANITOWISH WTR NOT AVBL

ARBOR VITAE    CLOUDY    47  47  99 S8        29.71F FOG

EAGLE RIVER    CLOUDY    45  45 100 S6        29.72S

LAND O LAKES   CLOUDY    44  44 100 S5        29.73F

RHINELANDER    CLOUDY    47  46  97 S12G21    29.74F FOG

PHILLIPS       CLOUDY    52  52 100 S12       29.68F

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        NOT AVBL

$$



WIZ013-073-121700-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  LGT RAIN  43  43 100 SE13      29.76F FOG

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-121700-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        CLOUDY    47  46  97 SE9       29.74F THUNDER

WAUSAU         NOT AVBL

MOSINEE        RAIN      48  48 100 E6        29.78F FOG

MARSHFIELD     CLOUDY    54  54 100 E5        29.75F FOG

WISC RAPIDS    LGT RAIN  58  57  97 SW9       29.77F FOG

STEVENS POINT  NOT AVBL

WAUPACA        RAIN      50  49  95 CALM      29.84F VSB 1

SHAWANO        RAIN      46  44  92 E5        29.84F

CLINTONVILLE   NOT AVBL

WAUTOMA        CLOUDY    51  50  96 N3        29.81S FOG

$$



WIZ038-039-048-051-121700-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  RAIN      48  47  96 VRB6      29.83F FOG

APPLETON       TSTM      57  57 100 SW8       29.83S

OSHKOSH        TSTM      58  56  93 SW7       29.81F FOG

FOND DU LAC    PTSUNNY   61  56  83 S12       29.82F

$$



WIZ022-050-052-121700-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        NOT AVBL

WASHINGTON ISL NOT AVBL

STURGEON BAY   NOT AVBL

MANITOWOC      LGT RAIN  46  46 100 SE5       29.85S FOG

SHEBOYGAN      LGT RAIN  58  55  90 S10       29.84F FOG

$$



LMZ563-521-522-541>543-121700-

LAKESHORE



STATION/POSITION TIME  TEMP    WIND        PRES    VSBY  WAVE

                       AIR SEA DIR/SP/G                  HT/PER

                 (UTC) (F)     (DEG/KT/KT) (MB)    (MI)  (FT/S)

SHEBOYGAN LKSHOR 1500   42     170/ 23/ 25 1011.2F

KEWAUNEE LKSHORE 1524          170/  1/  3 1010.5

NORTHPORT PIER   1500   43     110/ 18/ 21 1012.9

MENOMINEE LKSHOR 1524   39 39  100/  7/ 11 1010.8

$$

Additional Data
^{Note: Check data times to verify information is current.}

Lake Winnebago Buoy
- INFOS WinnGB Project

Lake Winnebago Water Temperatures
- Latest hourly reading
- Last 21 days
- Daily stream water temps -- See bottom of report; including Lk Winnebago

About these Forecasts

This forecast is available during the boating season, usually April through the end of October. The forecast, both graphical and text, is generated several times per day with updates made when weather conditions become unrepresentative. Use with caution. Be sure to check the product creation time to verify that the forecast you are viewing is current. Forecasts are valid for either 36 or 48 hours dependent on issuance time. Forecast elements include winds, significant wave heights, sensible weather, and associated restrictions to visibility if applicable over the open lake waters.

A wave model is run by NWS in Green Bay which produces the wave height forecast for Lake Winnebago. Forecasters at NWS Green Bay develop the wind forecast that is used in the wave model. The wave model has been used on the Great Lakes and has been shown to do reasonably well.

The latest observations for sites along the lake are also being provided. You may ask “Are these really the kind of winds you can expect on the open area of a lake or reservoir?” Any lake recreationalist will probably tell you that the winds are often found to be stronger than what was forecast or seen at the surrounding observation sites. Studies have shown that there is approximately a 4 to 5 mph increase in sustained wind speeds on open bodies of water compared to the nearest airport. Keep in mind that this difference is over an open waterway and is not necessarily what one would find if they were boating in a protected pocket of the waterway or near a wind protected structure such as a tree line, an island or point.

Click here for more answers to some questions you may have regarding the Lake Winnebago Recreational Forecast.

We greatly value your input into ways to make the forecast and this website more useful. Please contact nws.greenbay@noaa.gov with any suggestions, comments or questions.