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.}

009
SXUS43 KGRB 211352
RECGRB
WIZ048-WIZ049-212100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
852 AM CDT Mon Sep 21 2026

.TODAY...Northeast winds 5 to 15 knots. Cloudy. Waves 1 to
3 feet. Highs around 60.
.TONIGHT...Northeast winds 10 to 15 knots. Mostly cloudy. Waves
1 to 3 feet. Lows around 50.
.TUESDAY...Northeast winds 10 to 15 knots. Mostly cloudy in the
morning then becoming mostly sunny. Waves 1 to 3 feet. Highs in
the lower 60s.
.TUESDAY NIGHT...Northeast winds around 10 knots. Mostly clear.
Waves 1 to 3 feet. Lows in the upper 40s.

$$

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

    
                        

062

ASUS43 KGRB 211359

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

900 AM CDT MON SEP 21 2026



WIZ005-009-010>012-018-019-211500-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       PTSUNNY   47  43  86 E7        30.38R

MANITOWISH WTR NOT AVBL

ARBOR VITAE    NOT AVBL

EAGLE RIVER    NOT AVBL

LAND O LAKES   NOT AVBL

RHINELANDER    PTSUNNY   46  40  79 E9        30.36R

PHILLIPS       MOSUNNY   46  42  86 E5        30.34R

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        PTSUNNY   54  49  84 E10       30.31S

$$



WIZ013-073-211500-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  PTSUNNY   48  38  68 E7        30.36R

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-211500-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        MOSUNNY   48  48 100 E13       30.31R

WAUSAU         NOT AVBL

MOSINEE        CLOUDY    50  46  87 E14       30.30R

MARSHFIELD     PTSUNNY   52  47  83 E12       30.29R

WISC RAPIDS    PTSUNNY   52  47  83 E8        30.28R

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        PTSUNNY   54  49  83 NE10G20   30.27R

$$



WIZ038-039-048-051-211500-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  PTSUNNY   58  49  72 E14G20    30.29S

APPLETON       MOSUNNY   54  52  94 NE6       30.29R

OSHKOSH        CLOUDY    58  50  75 E15G25    30.25S

FOND DU LAC    CLOUDY    57  51  80 E12       30.25R

$$



WIZ022-050-052-211500-

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   58  49  72 NE8       30.28S

SHEBOYGAN      PTSUNNY   58  51  78 E13G23    30.26R

$$



LMZ563-521-522-541>543-211500-

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 1340   58      70/ 21/ 24 1024.0R

KEWAUNEE LKSHORE 1306           70/ 16/ 18 1025.1

NORTHPORT PIER   1300           50/ 14/ 19 1027.8

N MID LAKE BUOY  1340   55 65   80/ 17/ 19 1027.3R

CHAMBERS ISLAND  1340   57      20/ 12/ 18   N/A

MENOMINEE LKSHOR 1306   57 66   50/ 19/ 21 1026.4

$$

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.