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.}

934
SXUS43 KGRB 221050
RECGRB
WIZ048-WIZ049-222100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
550 AM CDT Tue Jul 22 2025

.TODAY...South winds 5 to 10 knots. Partly sunny. Waves 1 foot or
less. Highs around 80.
.TONIGHT...South winds 10 to 15 knots. Chance of showers and
slight chance of thunderstorms after midnight. Waves 1 foot or
less. Lows in the mid 70s.
.WEDNESDAY...Southwest winds around 15 knots. Chance of
thunderstorms in the morning, then slight chance of thunderstorms
in the afternoon. Waves 1 foot or less. Highs in the upper 80s.
.WEDNESDAY NIGHT...Southwest winds 10 to 15 knots. Mostly clear.
Waves 1 foot or less. Lows in the upper 70s.

$$

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

    
                        

646

ASUS43 KGRB 221059

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

600 AM CDT TUE JUL 22 2025



WIZ005-009-010>012-018-019-221200-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       PTCLDY    66  57  72 SE10      30.01F

MANITOWISH WTR NOT AVBL

ARBOR VITAE    MOCLDY    63  54  73 S5        30.06S

EAGLE RIVER    PTCLDY    60  54  80 CALM      30.07F

LAND O LAKES   MOCLDY    61  54  77 CALM      30.09F

RHINELANDER    CLEAR     59  54  83 S3        30.07F

PHILLIPS       NOT AVBL

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        CLOUDY    61  58  87 SE3       30.05F

$$



WIZ013-073-221200-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  CLOUDY    60  59  96 S3        30.08S

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-221200-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        CLOUDY    63  55  75 SE6       30.05F

WAUSAU         CLOUDY    63  55  75 SE6       30.06F

MOSINEE        CLOUDY    63  55  77 SE5       30.06S

MARSHFIELD     CLOUDY    63  56  78 SE5       30.05S

WISC RAPIDS    CLOUDY    64  54  69 S5        30.06S

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        CLOUDY    62  58  86 CALM      30.08R

$$



WIZ038-039-048-051-221200-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  PTCLDY    58  58 100 CALM      30.08S FOG

APPLETON       PTCLDY    64  61  88 CALM      30.08S

OSHKOSH        CLOUDY    63  59  87 CALM      30.07S

FOND DU LAC    MOCLDY    63  60  90 S6        30.07F

$$



WIZ022-050-052-221200-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        NOT AVBL

WASHINGTON ISL NOT AVBL

STURGEON BAY   NOT AVBL

MANITOWOC      PTCLDY    61  60  97 CALM      30.09S

SHEBOYGAN      FOG       58  58 100 CALM      30.08F VSB 1

$$



LMZ563-521-522-541>543-221200-

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 1000   67     150/  3/  4 1018.6S

KEWAUNEE LKSHORE 1030   67     170/  8/ 10 1017.6R

NORTHPORT PIER   1000          130/  9/ 15   N/A

N MID LAKE BUOY  1040   65     190/ 10/ 14 1019.4R

S GREEN BAY BUOY 1000   69 71  210/  8/ 10  998.1          1

CHAMBERS ISLAND  1040   66     100/  4/  7   N/A

MENOMINEE LKSHOR 1030   68 74  160/  6/  8 1017.7F

$$

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.