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.}

721
SXUS43 KGRB 180721
RECGRB
WIZ048-WIZ049-180900-

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

.REST OF THE NIGHT...Northwest winds 15 to 20 knots. Chance of
rain showers. Waves less than 1 foot. Lows in the upper 30s.
.SATURDAY...West winds 15 to 20 knots. Chance of sprinkles in the
morning. Slight chance of snow showers through the day. Slight
chance of rain showers in the afternoon. Waves less than 1 foot.
Highs in the mid 40s.
.SATURDAY NIGHT...West winds 10 to 20 knots. Slight chance of
rain showers and snow showers in the evening. Waves less than
1 foot. Lows in the lower 30s.
.SUNDAY...Northwest winds 10 to 15 knots. Chance of flurries in
the morning. Chance of sprinkles through the day. Waves less than
1 foot. Highs in the lower 40s.

$$

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

    
                        

378

ASUS43 KGRB 180759

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

300 AM CDT SAT APR 18 2026



WIZ005-009-010>012-018-019-180900-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       CLOUDY    30  24  78 W14G22    29.64S

MANITOWISH WTR NOT AVBL

ARBOR VITAE    CLOUDY    32  27  80 NW13G25   29.60S

EAGLE RIVER    CLOUDY    32  28  86 W13G24    29.58S

LAND O LAKES   CLOUDY    32  32 100 W7        29.59S

RHINELANDER    CLOUDY    32  28  85 NW12G18   29.60R

PHILLIPS       CLOUDY    32  24  72 W9G20     29.64F

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        NOT AVBL

$$



WIZ013-073-180900-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  CLOUDY    39  36  89 NW18G30   29.49F

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-180900-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        CLOUDY    35  27  72 NW13G21   29.65R

WAUSAU         NOT AVBL

MOSINEE        NOT AVBL

MARSHFIELD     CLOUDY    38  30  73 NW24G35   29.64S

WISC RAPIDS    CLOUDY    40  32  73 NW15G29   29.64F

STEVENS POINT  NOT AVBL

WAUPACA        CLOUDY    43  34  69 W10G18    29.63S

SHAWANO          N/A     45  38  76 NW15G23   29.56R

CLINTONVILLE   NOT AVBL

WAUTOMA        CLOUDY    41  35  79 W15G22    29.62F

$$



WIZ038-039-048-051-180900-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  CLOUDY    47  43  86 W21G26    29.55R

APPLETON       CLOUDY    45  41  87 W17       29.57R

OSHKOSH        CLOUDY    44  38  79 W16G28    29.58R

FOND DU LAC    CLOUDY    44  39  82 W16G29    29.60R

$$



WIZ022-050-052-180900-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        NOT AVBL

WASHINGTON ISL NOT AVBL

STURGEON BAY   NOT AVBL

MANITOWOC      CLOUDY    49  47  93 W16       29.53S

SHEBOYGAN      CLOUDY    47  44  90 W17G25    29.55R

$$



LMZ563-521-522-541>543-180900-

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 0700   54     280/ 15/ 18  999.9R

KEWAUNEE LKSHORE 0706          280/ 10/ 17  998.4

NORTHPORT PIER   0700          160/  3/ 11  998.3

MENOMINEE LKSHOR 0712      43  260/ 14/ 21  997.2

$$

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.