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.}

320
SXUS43 KGRB 131836
RECGRB
WIZ048-WIZ049-132100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
136 PM CDT Wed May 13 2026

.THIS AFTERNOON...North winds 10 to 15 knots. Partly sunny. Waves
1 to 3 feet. Highs in the upper 50s.
.TONIGHT...Northwest winds up to 10 knots. Mostly clear. Waves
1 foot or less. Lows in the lower 40s.
.THURSDAY...Northwest winds up to 5 knots backing south in the
afternoon. Sunny. Waves less than 1 foot. Highs in the lower 60s.
.THURSDAY NIGHT...South winds 5 to 15 knots. Chance of rain
showers after midnight. Waves 1 foot or less. Lows around 50.

$$

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

    
                        

811

ASUS43 KGRB 131910

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

200 PM CDT WED MAY 13 2026



WIZ005-009-010>012-018-019-132000-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       SUNNY     55  34  45 N14G22    30.09F

MANITOWISH WTR PTSUNNY   54  32  42 N13G18    30.06S

ARBOR VITAE    CLOUDY    54  33  45 N10       30.06S

EAGLE RIVER    CLOUDY    56  30  37 N9        30.05S

LAND O LAKES   PTSUNNY   56  31  38 N10G21    30.07S

RHINELANDER    PTSUNNY   54  32  43 N12G18    30.06S

PHILLIPS       CLOUDY    56  37  49 N12G22    30.07S

ANTIGO         PTSUNNY   56  36  47 N15G22    30.05S

TOMAHAWK       CLOUDY    57  35  43 NW10G16   30.06F

MERRILL        NOT AVBL

$$



WIZ013-073-132000-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  MOSUNNY   57  36  45 NW13G24   30.00F

MARINETTE      PTSUNNY   54  35  48 N18G25    30.01S

OCONTO         CLOUDY    55  34  45 N14G22    30.02S

$$



WIZ017-030-035>037-045-132000-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        CLOUDY    58  36  43 N14       30.06S

WAUSAU         PTSUNNY   57  35  43 NW13G23   30.05F

MOSINEE        PTSUNNY   57  37  47 N16G23    30.06S

MARSHFIELD     PTSUNNY   61  37  41 NE13G21   30.05F

WISC RAPIDS    PTSUNNY   60  37  42 N18G26    30.06S

STEVENS POINT  PTSUNNY   60  35  40 N15G25    30.06S

WAUPACA        CLOUDY    62  34  35 NW12      30.06S

SHAWANO        CLOUDY    58  32  37 N10G18    30.03S

CLINTONVILLE   PTSUNNY   58  33  40 NW12G20   30.05S

WAUTOMA        PTSUNNY   60  36  40 NW14G23   30.04S

$$



WIZ038-039-048-051-132000-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  PTSUNNY   57  35  43 N16G25    30.02S

APPLETON       PTSUNNY   59  36  41 NW14G23   30.03S

OSHKOSH        PTSUNNY   59  37  44 NW15G24   30.02R

FOND DU LAC    CLOUDY    54  37  52 NE15      30.02S

$$



WIZ022-050-052-132000-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        SUNNY     48  34  58 N12       29.99S

WASHINGTON ISL SUNNY     51  36  56 N14       29.98R

STURGEON BAY   SUNNY     50  37  61 N13G22    30.01S

MANITOWOC      PTSUNNY   55  36  48 N21G31    30.01R

SHEBOYGAN      PTSUNNY   56  35  45 N20G30    30.01S

$$



LMZ563-521-522-541>543-132000-

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 1900   51     360/ 18/ 20 1016.5S

KEWAUNEE LKSHORE 1824          340/ 15/ 30 1015.4

NORTHPORT PIER   1800          290/ 13     1016.3

MENOMINEE LKSHOR 1824   50 52  320/ 17/ 20 1015.2

$$

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.