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.}

853
SXUS43 KGRB 211621
RECGRB
WIZ048-WIZ049-212100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
1121 AM CDT Thu May 21 2026

.TODAY...East winds around 10 knots. Partly sunny. Waves 1 foot
or less. Highs in the mid 50s.
.TONIGHT...East winds around 10 knots. Partly cloudy in the
evening then becoming mostly cloudy. Waves 1 foot or less. Lows
in the mid 40s.
.FRIDAY...East winds 10 to 15 knots. Partly sunny. Waves 1 foot
or less. Highs in the upper 50s.
.FRIDAY NIGHT...East winds 10 to 15 knots. Rain showers likely
after midnight. Waves 1 foot or less. Lows in the upper 40s.

$$

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

    
                        

334

ASUS43 KGRB 211559

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

1100 AM CDT THU MAY 21 2026



WIZ005-009-010>012-018-019-211700-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       SUNNY     53  30  41 VRB5      30.37F

MANITOWISH WTR NOT AVBL

ARBOR VITAE    SUNNY     52  30  42 SW8       30.36F

EAGLE RIVER    NOT AVBL

LAND O LAKES   NOT AVBL

RHINELANDER    SUNNY     52  28  39 VRB7      30.37F

PHILLIPS       NOT AVBL

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        SUNNY     55  27  34 CALM      30.36F

$$



WIZ013-073-211700-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  SUNNY     50  31  48 E8        30.39F

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-211700-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        SUNNY     52  34  50 SE7       30.36F

WAUSAU         NOT AVBL

MOSINEE        SUNNY     54  32  43 E5G12     30.36F

MARSHFIELD     SUNNY     53  35  50 SE10      30.35F

WISC RAPIDS    MOSUNNY   54  29  38 SE12      30.36F

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        PTSUNNY   51  32  48 NE12      30.37F

$$



WIZ038-039-048-051-211700-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  CLOUDY    49  36  61 NE10      30.39F

APPLETON       MOSUNNY   50  30  46 NE10      30.39F

OSHKOSH        CLOUDY    48  33  56 E7        30.38F

FOND DU LAC    CLOUDY    49  31  49 NE9       30.37F

$$



WIZ022-050-052-211700-

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    44  37  76 NE10      30.40F

SHEBOYGAN      CLOUDY    45  36  70 N12       30.39S

$$



LMZ563-521-522-541>543-211700-

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   40      20/ 13/ 14 1029.8R

KEWAUNEE LKSHORE 1530           30/ 12/ 15 1029.2F

NORTHPORT PIER   1500           50/ 13/ 16 1031.2

MENOMINEE LKSHOR 1530   43 59   30/ 11/ 14 1030.3F

$$

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.