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.}

925
SXUS43 KGRB 112050
RECGRB
WIZ048-WIZ049-120900-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
350 PM CDT Mon Aug 11 2025

.REST OF THE AFTERNOON...West winds 5 to 10 knots. Mostly sunny.
Waves less than 1 foot. Near steady temperature around 80.
.TONIGHT...Southwest winds 5 to 10 knots. Slight chance of
thunderstorms after midnight. Waves less than 1 foot. Lows in the
lower 70s.
.TUESDAY...Southwest winds 5 to 10 knots. Chance of showers and
slight chance of thunderstorms in the morning, then chance of
thunderstorms in the afternoon. Waves 1 foot or less. Highs in
the upper 70s.
.TUESDAY NIGHT...West winds 5 to 10 knots. Mostly clear. Waves
1 foot or less. Lows in the mid 60s.
.WEDNESDAY...Northwest winds 5 to 10 knots. Sunny. Waves less
than 1 foot. Highs in the upper 70s.

$$

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

    
                        

849

ASUS43 KGRB 112059

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

400 PM CDT MON AUG 11 2025



WIZ005-009-010>012-018-019-112200-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       MOSUNNY   76  62  62 W9        29.96F

MANITOWISH WTR NOT AVBL

ARBOR VITAE    NOT AVBL

EAGLE RIVER    NOT AVBL

LAND O LAKES   NOT AVBL

RHINELANDER    MOSUNNY   77  59  53 SW9       30.00S

PHILLIPS       NOT AVBL

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        NOT AVBL

$$



WIZ013-073-112200-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  MOSUNNY   82  62  50 W8        29.94F

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-112200-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        NOT AVBL

WAUSAU         MOSUNNY   79  61  53 SW9       29.99F

MOSINEE        SUNNY     77  64  65 SW9       29.99F

MARSHFIELD     MOSUNNY   78  61  55 SW6       29.99F

WISC RAPIDS    SUNNY     82  61  48 W7        29.99F

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        MOSUNNY   84  65  52 SW8       29.98F

$$



WIZ038-039-048-051-112200-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  MOSUNNY   82  68  62 W12       29.96F

APPLETON       MOSUNNY   84  66  54 SW10      29.99F

OSHKOSH        MOSUNNY   81  66  60 VRB7      29.98F

FOND DU LAC    MOSUNNY   81  68  64 SW7       29.99F

$$



WIZ022-050-052-112200-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        NOT AVBL

WASHINGTON ISL NOT AVBL

STURGEON BAY   NOT AVBL

MANITOWOC      MOSUNNY   82  68  62 W9        29.97F

SHEBOYGAN      MOSUNNY   81  69  67 W10       29.98F

$$



LMZ563-521-522-541>543-112200-

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 2000   81     250/ 10/ 12 1015.1F

KEWAUNEE LKSHORE 2024   83     260/  7/ 11 1013.4

NORTHPORT PIER   2000          130/  8/ 10   N/A

N MID LAKE BUOY  2040   72 73  180/ 14/ 16 1013.5F

S GREEN BAY BUOY 2000   79 76  260/ 12/ 14  993.9          1

CHAMBERS ISLAND  2040   80     150/  5/ 13   N/A

MENOMINEE LKSHOR 2024   81 70  240/  9/ 12 1013.3

$$

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.