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.}

783
SXUS43 KGRB 250926
RECGRB
WIZ048-WIZ049-252100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
426 AM CDT Fri Sep 25 2026

.EARLY THIS MORNING...East winds up to 5 knots. Chance of
sprinkles. Waves less than 1 foot. Near steady temperature in the
upper 50s.
.TODAY...East winds around 5 knots. Partly sunny in the morning
then clearing. Waves 1 foot or less. Highs in the upper 60s.
.TONIGHT...East winds up to 5 knots. Mostly clear. Waves 1 foot
or less. Lows in the lower 50s.
.SATURDAY...Southeast winds up to 5 knots. Mostly sunny. Waves
1 foot or less. Highs in the upper 60s.
.SATURDAY NIGHT...Southeast winds up to 10 knots. Partly cloudy.
Waves 1 foot or less. Lows in the lower 50s.

$$

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

    
                        

947

ASUS43 KGRB 250910

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

400 AM CDT FRI SEP 25 2026



WIZ005-009-010>012-018-019-251000-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       MOCLDY    47  47 100 CALM      30.33S

MANITOWISH WTR FOG       44  43  99 CALM      30.34S VSB 1/4

ARBOR VITAE    PTCLDY    46  46 100 CALM      30.34S FOG

EAGLE RIVER    MOCLDY   N/A N/A N/A CALM      30.34S

LAND O LAKES   CLEAR     47  47 100 CALM      30.36F

RHINELANDER    CLOUDY    48  47  96 CALM      30.35R

PHILLIPS       CLOUDY    54  53  96 CALM      30.33S

ANTIGO         MOCLDY    53  53  99 CALM      30.34F

TOMAHAWK       CLOUDY    55  53  95 CALM      30.35S

MERRILL        CLOUDY    53  52  99 CALM      30.32S

$$



WIZ013-073-251000-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  MOCLDY    48  48 100 CALM      30.34R

MARINETTE      CLOUDY    54  54 100 NW3       30.34R

OCONTO         CLOUDY    55  54  99 CALM      30.33S

$$



WIZ017-030-035>037-045-251000-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        CLOUDY    55  54  99 CALM      30.33S

WAUSAU         CLOUDY    56  51  84 CALM      30.32F

MOSINEE        CLOUDY    55  54  94 E3        30.32S

MARSHFIELD     CLOUDY    56  54  93 E3        30.32S

WISC RAPIDS    CLOUDY    55  54  96 CALM      30.32F

STEVENS POINT  CLOUDY    57  54  89 CALM      30.32F

WAUPACA        MOCLDY    53  51  94 CALM      30.35S

SHAWANO        CLOUDY    56  56 100 CALM      30.34S

CLINTONVILLE   MOCLDY    54  53  95 CALM      30.34S

WAUTOMA        LGT RAIN  56  54  93 CALM      30.32S

$$



WIZ038-039-048-051-251000-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  CLOUDY    55  54  96 CALM      30.31S

APPLETON       MOCLDY    57  55  94 NW3       30.32S

OSHKOSH        MOCLDY    57  55  93 W5        30.31S

FOND DU LAC    MOCLDY    55  53  93 W5        30.31S

$$



WIZ022-050-052-251000-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        CLOUDY    56  53  89 CALM      30.32S

WASHINGTON ISL CLOUDY    54  50  87 CALM      30.33S

STURGEON BAY   CLOUDY    58  55  90 CALM      30.33S

MANITOWOC      CLOUDY    56  55  97 NW3       30.31F

SHEBOYGAN      MOCLDY    56  55  97 CALM      30.30S

$$



LMZ563-521-522-541>543-251000-

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 0850   62     350/  4/  4 1026.0F

KEWAUNEE LKSHORE 0824          150/  5/  7 1025.9

NORTHPORT PIER   0800          140/  3/  6 1027.4

N MID LAKE BUOY  0850   62 64  180/  8/ 10 1027.0R         1/ 3

CHAMBERS ISLAND  0840   57      CALM  /  1   N/A

MENOMINEE LKSHOR 0824   62 64   60/  4/  5 1026.6

$$

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.