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.}

609
SXUS43 KGRB 181822
RECGRB
WIZ048-WIZ049-182100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
121 PM CDT Sat Apr 18 2026

.THIS AFTERNOON...West winds around 20 knots. Partly sunny. Waves
less than 1 foot. Highs in the lower 40s.
.TONIGHT...West winds 10 to 20 knots. Partly cloudy. Waves less
than 1 foot. Lows in the mid 30s.
.SUNDAY...Northwest winds 10 to 15 knots. Slight chance of snow
showers in the morning. Waves less than 1 foot. Highs in the
lower 40s.
.SUNDAY NIGHT...North winds 5 to 10 knots veering east after
midnight. Mostly clear. Waves less than 1 foot. Lows in the upper
20s.

$$

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

    
                        

836

ASUS43 KGRB 181910

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

200 PM CDT SAT APR 18 2026



WIZ005-009-010>012-018-019-182000-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       CLOUDY    33  16  49 W25G32    29.77S

MANITOWISH WTR CLOUDY    35  15  44 W14G24    29.76R

ARBOR VITAE    PTSUNNY   35  15  44 W16G31    29.76R

EAGLE RIVER    CLOUDY    36  13  37 W17G28    29.74R

LAND O LAKES   PTSUNNY   37  15  41 W9G22     29.75R

RHINELANDER    PTSUNNY   35  15  44 NW15G28   29.76R

PHILLIPS       CLOUDY    33  15  47 W10G22    29.81R

ANTIGO         CLOUDY    37  22  54 W25G33    29.78R

TOMAHAWK       CLOUDY    37  18  46 MISG      29.80S

MERRILL        NOT AVBL

$$



WIZ013-073-182000-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  PTSUNNY   40  20  44 W17G29    29.70S

MARINETTE      CLOUDY    42  24  49 VRB6G17   29.77S

OCONTO         CLOUDY    42  22  44 W17G28    29.78S

$$



WIZ017-030-035>037-045-182000-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        CLOUDY    33  18  53 W21G29    29.83R

WAUSAU         CLOUDY    35  18  49 W24G32    29.83R

MOSINEE        CLOUDY    36  23  60 W16G25    29.84R

MARSHFIELD     CLOUDY    37  22  54 W22G32    29.86R

WISC RAPIDS    CLOUDY    39  18  42 NW15G31   29.87R

STEVENS POINT  CLOUDY    38  20  49 W17G25    29.85R

WAUPACA        CLOUDY    42  22  45 W16G25    29.87S

SHAWANO        CLOUDY    42  22  45 W17G25    29.80S

CLINTONVILLE   CLOUDY    40  23  50 W18       29.84R

WAUTOMA        CLOUDY    41  22  46 NW21G30   29.87R

$$



WIZ038-039-048-051-182000-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  CLOUDY    39  26  59 W16G26    29.81R

APPLETON       CLOUDY    43  27  52 W23G31    29.82F

OSHKOSH        PTSUNNY   41  25  53 W18G29    29.82S

FOND DU LAC    CLOUDY    42  26  53 W16       29.85R

$$



WIZ022-050-052-182000-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        CLOUDY    40  22  49 W12G23    29.75R

WASHINGTON ISL CLOUDY    41  25  53 W12       29.74S

STURGEON BAY   CLOUDY    40  25  55 W16G22    29.78S

MANITOWOC      CLOUDY    40  26  57 W20       29.82R

SHEBOYGAN      CLOUDY    41  28  60 W22       29.83R

$$



LMZ563-521-522-541>543-182000-

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 1900   40     280/ 13/ 17 1010.4R

KEWAUNEE LKSHORE 1824          280/ 19/ 24 1008.2

NORTHPORT PIER   1800   39     240/  9/ 16 1008.5

MENOMINEE LKSHOR 1824   40 43  250/ 12/ 20 1007.2

$$

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.