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.}

381
SXUS43 KGRB 221621
RECGRB
WIZ048-WIZ049-222100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
1121 AM CDT Fri May 22 2026

.TODAY...East winds 10 to 15 knots. Partly sunny. Waves 1 foot or
less. Highs around 60.
.TONIGHT...East winds 10 to 15 knots. Mostly cloudy. Waves 1 foot
or less. Lows around 50.
.SATURDAY...East winds 5 to 10 knots. Slight chance of rain
showers in the morning. Waves 1 foot or less. Highs in the lower
60s.
.SATURDAY NIGHT...Southeast winds around 5 knots. Mostly cloudy.
Waves less than 1 foot. Lows in the lower 50s.

$$

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

    
                        

561

ASUS43 KGRB 221659

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

1200 PM CDT FRI MAY 22 2026



WIZ005-009-010>012-018-019-221800-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       PTSUNNY   62  30  29 S12G24    30.20F

MANITOWISH WTR NOT AVBL

ARBOR VITAE    MOSUNNY   60  26  27 E13G20    30.20F

EAGLE RIVER    NOT AVBL

LAND O LAKES   NOT AVBL

RHINELANDER    MOSUNNY   61  29  29 E22G28    30.21F

PHILLIPS       NOT AVBL

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        NOT AVBL

$$



WIZ013-073-221800-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  MOSUNNY   62  36  37 E13G23    30.25F

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-221800-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        NOT AVBL

WAUSAU         NOT AVBL

MOSINEE        SUNNY     61  36  39 E18G28    30.18F

MARSHFIELD     MOSUNNY   62  39  42 SE18G29   30.16F

WISC RAPIDS    SUNNY     65  37  35 SE16G28   30.17F

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        CLOUDY    62  35  36 E12G21    30.18F

$$



WIZ038-039-048-051-221800-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  SUNNY     62  34  35 E15G25    30.23F

APPLETON       PTSUNNY   63  36  36 E14G20    30.22F

OSHKOSH        PTSUNNY   62  34  35 E17G24    30.19F

FOND DU LAC    CLOUDY    60  33  36 E14G23    30.19F

$$



WIZ022-050-052-221800-

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   57  37  47 E12       30.23S

SHEBOYGAN      CLOUDY    54  37  52 E12       30.21F

$$



LMZ563-521-522-541>543-221800-

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 1600   46      30/ 12/ 15 1023.6F

KEWAUNEE LKSHORE 1624           30/ 10/ 13 1023.9

NORTHPORT PIER   1600           60/  6/ 10 1026.8

MENOMINEE LKSHOR 1624   47 59   20/ 14/ 17 1025.4

$$

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.