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.}

750
SXUS43 KGRB 211901
RECGRB
WIZ048-WIZ049-220900-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
201 PM CDT Fri Aug 21 2026

.REST OF THE AFTERNOON...South winds 5 to 10 knots. Chance of
thunderstorms. Waves 1 foot or less. Highs in the upper 70s.
.TONIGHT...Southwest winds 5 to 10 knots veering northwest after
midnight. Chance of thunderstorms in the evening. Waves 1 foot or
less. Lows in the lower 60s.
.SATURDAY...Northwest winds 10 to 15 knots. Chance of
thunderstorms in the afternoon. Waves 1 foot or less. Highs in
the upper 70s.
.SATURDAY NIGHT...Northwest winds around 10 knots. Chance of
thunderstorms in the evening. Waves 1 foot or less. Lows in the
upper 50s.
.SUNDAY...Northwest winds 5 to 10 knots. Sunny. Waves 1 foot or
less. Highs in the mid 70s.

$$

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

    
                        

082

ASUS43 KGRB 211959

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

300 PM CDT FRI AUG 21 2026



WIZ005-009-010>012-018-019-212100-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       CLOUDY    62  61  96 NW9       29.98S FOG

MANITOWISH WTR NOT AVBL

ARBOR VITAE    NOT AVBL

EAGLE RIVER    NOT AVBL

LAND O LAKES   NOT AVBL

RHINELANDER    PTSUNNY   76  62  62 W7        29.93F THUNDER

PHILLIPS       NOT AVBL

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        NOT AVBL

$$



WIZ013-073-212100-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  PTSUNNY   70  63  78 SE8       29.91F

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-212100-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        MOSUNNY   77  62  60 W7        29.93F

WAUSAU         NOT AVBL

MOSINEE        MOSUNNY   79  66  65 W6G13     29.92F

MARSHFIELD     SUNNY     81  60  48 W12G20    29.93F

WISC RAPIDS    PTSUNNY   79  64  60 W7        29.93F

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        PTSUNNY   77  69  76 S5        29.93F

$$



WIZ038-039-048-051-212100-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  CLOUDY    72  64  76 SW7       29.94F

APPLETON       CLOUDY    73  66  78 SW9       29.96S

OSHKOSH        CLOUDY    73  66  78 SW9G16    29.94F

FOND DU LAC    MOSUNNY   74  64  71 SW13G24   29.95F

$$



WIZ022-050-052-212100-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        NOT AVBL

WASHINGTON ISL NOT AVBL

STURGEON BAY   NOT AVBL

MANITOWOC      PTSUNNY   75  65  70 SW8       29.95F

SHEBOYGAN      PTSUNNY   73  63  70 SW13      29.95F

$$



LMZ563-521-522-541>543-212100-

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 1920   70     210/ 11/ 13 1014.1

KEWAUNEE LKSHORE 1918          170/  5/  7 1013.9

NORTHPORT PIER   1900          130/  6/ 11 1014.9

N MID LAKE BUOY  1910   70 70  200/ 16/ 17 1014.0

MENOMINEE LKSHOR 1918      71  180/  8/ 11 1013.8

$$

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.