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.}

877
SXUS43 KGRB 201106
RECGRB
WIZ048-WIZ049-202100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
606 AM CDT Wed May 20 2026

.TODAY...North winds 5 to 10 knots. Mostly sunny. Waves 1 to
2 feet. Highs in the upper 50s.
.TONIGHT...East winds 5 to 15 knots. Mostly cloudy in the evening
then becoming partly cloudy. Waves 1 to 3 feet. Lows in the lower
40s.
.THURSDAY...East winds 5 to 10 knots. Partly sunny. Waves 1 to
2 feet. Highs in the mid 50s.
.THURSDAY NIGHT...East winds around 10 knots. Partly cloudy in
the evening then becoming mostly cloudy. Waves 1 foot or less.
Lows in the mid 40s.

$$

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

    
                        

524

ASUS43 KGRB 201559

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

1100 AM CDT WED MAY 20 2026



WIZ005-009-010>012-018-019-201700-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       CLOUDY    46  34  62 NW6       30.33S

MANITOWISH WTR NOT AVBL

ARBOR VITAE    PTSUNNY   46  32  59 NW3       30.30F

EAGLE RIVER    NOT AVBL

LAND O LAKES   NOT AVBL

RHINELANDER    CLOUDY    47  30  51 VRB6      30.31R

PHILLIPS       NOT AVBL

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        CLOUDY    51  32  48 N3        30.29F

$$



WIZ013-073-201700-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  FAIR      52  31  44 N12G22    30.28S

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-201700-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        CLOUDY    47  35  62 N3        30.31S

WAUSAU         NOT AVBL

MOSINEE        CLOUDY    52  34  50 N7        30.29F

MARSHFIELD     CLOUDY    52  35  52 VRB5      30.30S

WISC RAPIDS    PTSUNNY   54  33  45 N12       30.30S

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        CLOUDY    54  36  50 VRB3      30.30S

$$



WIZ038-039-048-051-201700-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  CLOUDY    52  40  63 NE10      30.29F

APPLETON       PTSUNNY   54  39  58 CALM      30.30S

OSHKOSH        CLOUDY    53  38  56 N5        30.29S

FOND DU LAC    CLOUDY    54  38  54 NE14      30.29S

$$



WIZ022-050-052-201700-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        NOT AVBL

WASHINGTON ISL NOT AVBL

STURGEON BAY   NOT AVBL

MANITOWOC      FAIR      50  42  74 E12G17    30.30S

SHEBOYGAN      CLOUDY    48  41  76 E13       30.30R

$$



LMZ563-521-522-541>543-201700-

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)

KEWAUNEE LKSHORE 1512           40/  9/ 13 1025.7

NORTHPORT PIER   1500          310/  6     1027.1

MENOMINEE LKSHOR 1512          100/  7/  9 1025.9

$$

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.