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.}

707
SXUS43 KGRB 150801
RECGRB
WIZ048-WIZ049-152100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
301 AM CDT Tue Sep 15 2026

.EARLY THIS MORNING...South winds around 20 knots. Showers and
chance of thunderstorms. Waves 3 to 6 feet. Near steady
temperature in the lower 60s.
.TODAY...West winds 10 to 20 knots. Chance of showers and slight
chance of thunderstorms in the morning, then slight chance of
showers in the afternoon. Waves 3 to 5 feet subsiding to 1 to
3 feet in the afternoon. Highs in the mid 70s.
.TONIGHT...Northwest winds 5 to 10 knots veering north after
midnight. Mostly cloudy in the evening then clearing. Waves
1 foot or less. Lows in the mid 50s.
.WEDNESDAY...East winds 5 to 10 knots. Mostly sunny. Waves 1 foot
or less. Highs in the upper 60s.
.WEDNESDAY NIGHT...East winds 5 to 10 knots. Chance of rain
showers. Waves 1 foot or less. Lows in the upper 50s.

$$

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

    
                        

408

ASUS43 KGRB 150759

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

300 AM CDT TUE SEP 15 2026



WIZ005-009-010>012-018-019-150900-

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    CLOUDY    54  53  97 S8        29.83F

PHILLIPS       CLOUDY    55  55  99 S8        29.80F

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        NOT AVBL

$$



WIZ013-073-150900-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  CLOUDY    57  55  93 S8        29.85F

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-150900-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        NOT AVBL

WAUSAU         NOT AVBL

MOSINEE        NOT AVBL

MARSHFIELD     CLOUDY    56  55  97 S9        29.83F

WISC RAPIDS    CLOUDY    57  55  93 SE3       29.85F

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        CLOUDY    59  58  96 S5        29.87F

$$



WIZ038-039-048-051-150900-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  LGT RAIN  60  58  92 S9        29.88F

APPLETON       NOT AVBL

OSHKOSH        MOCLDY    60  57  89 S15G28    29.87F

FOND DU LAC    LGT RAIN  60  57  89 S17G26    29.90F

$$



WIZ022-050-052-150900-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        NOT AVBL

WASHINGTON ISL NOT AVBL

STURGEON BAY   LGT RAIN  61  61 100 S14G22    29.91F

MANITOWOC      LGT RAIN  61  59  93 S10G17    29.91F

SHEBOYGAN      RAIN      60  57  89 S15       29.92F FOG

$$



LMZ563-521-522-541>543-150900-

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 0730   61     190/ 19/ 25 1013.7F

KEWAUNEE LKSHORE 0730          180/  8/ 11 1012.5F

NORTHPORT PIER   0700          130/ 10/ 17 1013.9

N MID LAKE BUOY  0710   61 67  190/ 27/ 35 1014.0

CHAMBERS ISLAND  0740   62     120/  8/ 21   N/A

MENOMINEE LKSHOR 0730   61 64  190/ 14/ 19 1012.6S

$$

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.