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.}

007
SXUS43 KGRB 180621
RECGRB
WIZ048-WIZ049-180900-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
121 AM CDT Mon May 18 2026

.REST OF THE NIGHT...South winds 10 to 20 knots. Patchy fog.
chance of thunderstorms. Waves 1 foot or less. Lows in the mid
50s.
.MONDAY...Southwest winds 10 to 20 knots. Chance of thunderstorms
in the morning, then slight chance of thunderstorms in the
afternoon. Waves 1 foot or less. Highs in the mid 70s.
.MONDAY NIGHT...South winds 10 to 20 knots. Slight chance of
thunderstorms in the evening, then chance of thunderstorms after
midnight. Waves 1 foot or less. Lows in the lower 60s.
.TUESDAY...West winds 15 to 20 knots. Chance of thunderstorms in
the morning. Waves 1 to 3 feet. Highs in the mid 60s.

$$

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

    
                        

470

ASUS43 KGRB 180559

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

100 AM CDT MON MAY 18 2026



WIZ005-009-010>012-018-019-180700-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       NOT AVBL

MANITOWISH WTR NOT AVBL

ARBOR VITAE    NOT AVBL

EAGLE RIVER    NOT AVBL

LAND O LAKES   NOT AVBL

RHINELANDER    NOT AVBL

PHILLIPS       NOT AVBL

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        NOT AVBL

$$



WIZ013-073-180700-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  NOT AVBL

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-180700-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        NOT AVBL

WAUSAU         NOT AVBL

MOSINEE        NOT AVBL

MARSHFIELD     NOT AVBL

WISC RAPIDS    NOT AVBL

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        NOT AVBL

$$



WIZ038-039-048-051-180700-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  FOG       51  51 100 E7        29.80F VSB 1/2

APPLETON       NOT AVBL

OSHKOSH        NOT AVBL

FOND DU LAC    NOT AVBL

$$



WIZ022-050-052-180700-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        NOT AVBL

WASHINGTON ISL NOT AVBL

STURGEON BAY   NOT AVBL

MANITOWOC      NOT AVBL

SHEBOYGAN      NOT AVBL

$$



LMZ563-521-522-541>543-180700-

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 0500   51     200/  6/  6 1010.6F

KEWAUNEE LKSHORE 0506           40/  7/  9 1009.2

NORTHPORT PIER   0500           80/ 13     1011.9

MENOMINEE LKSHOR 0512      57   10/  7/ 10 1010.2

$$

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.