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.}

421
SXUS43 KGRB 111952
RECGRB
WIZ048-WIZ049-120900-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
252 PM CDT Mon May 11 2026

.REST OF THE AFTERNOON...East winds 5 to 10 knots. Mostly sunny.
Waves 1 foot or less. Near steady temperature in the lower 50s.
.TONIGHT...Southeast winds 5 to 15 knots. Rain showers likely
after midnight. Waves 1 to 3 feet. Lows in the lower 40s.
.TUESDAY...South winds 15 to 20 knots. Rain showers in the
morning, then chance of rain showers and slight chance of
thunderstorms in the afternoon. Waves 3 to 5 feet. Highs in the
mid 60s.
.TUESDAY NIGHT...Northwest winds 15 to 20 knots. Chance of rain
showers in the evening. Waves 1 to 3 feet building to 2 to 4 feet
after midnight. Lows in the mid 40s.
.WEDNESDAY...Northwest winds 15 to 20 knots. Partly sunny. Waves
2 to 4 feet. Highs in the mid 50s.

$$

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

    
                        

067

ASUS43 KGRB 112010

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

300 PM CDT MON MAY 11 2026



WIZ005-009-010>012-018-019-112100-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       SUNNY     49  24  37 N12       30.21F

MANITOWISH WTR SUNNY     51  22  32 NW6       30.18F

ARBOR VITAE    SUNNY     51  23  32 CALM      30.20F

EAGLE RIVER    SUNNY     50  19  29 NE5       30.20F

LAND O LAKES   SUNNY     53  22  30 SW7       30.22S

RHINELANDER    MOSUNNY   53  23  31 S10       30.20F

PHILLIPS       SUNNY     53  26  35 SW8       30.19F

ANTIGO         PTSUNNY   51  26  37 CALM      30.22S

TOMAHAWK       MOSUNNY   56  23  27 SW7       30.19F

MERRILL        NOT AVBL

$$



WIZ013-073-112100-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  SUNNY     51  23  33 VRB3      30.21F

MARINETTE      SUNNY     48  24  39 S10       30.28F

OCONTO         SUNNY     49  27  42 SE8       30.27F

$$



WIZ017-030-035>037-045-112100-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        SUNNY     53  24  32 SW7       30.20F

WAUSAU         SUNNY     54  24  31 VRB3      30.21F

MOSINEE        SUNNY     54  27  35 CALM      30.21F

MARSHFIELD     SUNNY     57  26  30 MISG      30.20F

WISC RAPIDS    SUNNY     58  25  28 VRB5      30.21F

STEVENS POINT  SUNNY     57  24  28 CALM      30.22F

WAUPACA        MOSUNNY   58  24  27 CALM      30.25F

SHAWANO        PTSUNNY   54  24  30 NE3       30.24F

CLINTONVILLE   SUNNY     52  25  35 CALM      30.25F

WAUTOMA        SUNNY     56  25  30 NE5       30.21F

$$



WIZ038-039-048-051-112100-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  PTSUNNY   50  28  42 VRB3      30.26F

APPLETON       PTSUNNY   54  30  40 S7        30.24F

OSHKOSH        SUNNY     53  30  41 E9        30.24F

FOND DU LAC    MOSUNNY   53  29  39 NE10      30.25F

$$



WIZ022-050-052-112100-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        SUNNY     47  19  33 N3        30.26F

WASHINGTON ISL SUNNY     48  16  28 CALM      30.26F

STURGEON BAY   MOSUNNY   46  23  40 SE9       30.29S

MANITOWOC      SUNNY     45  26  47 E14       30.28F

SHEBOYGAN      MOSUNNY   47  26  44 E10       30.28S

$$



LMZ563-521-522-541>543-112100-

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 2000   40      60/ 10/ 12 1025.9F

KEWAUNEE LKSHORE 1924          110/  7/  9 1025.4

NORTHPORT PIER   1900          100/  5     1026.1

MENOMINEE LKSHOR 1924   44 51  130/  9/ 10 1024.6

$$

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.