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.}

423
SXUS43 KGRB 221356
RECGRB
WIZ048-WIZ049-222100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
856 AM CDT Wed Jul 22 2026

.TODAY...Northwest winds 5 to 10 knots. Sunny. Waves 1 foot or
less. Highs in the mid 70s.
.TONIGHT...West winds 5 to 10 knots. Mostly clear. Waves 1 foot
or less. Lows around 60.
.THURSDAY...Southwest winds 5 to 10 knots. Sunny. Waves 1 foot or
less. Highs in the upper 70s.
.THURSDAY NIGHT...Southwest winds 5 to 10 knots. Partly cloudy.
Waves 1 foot or less. Lows in the lower 60s.

$$

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

    
                        

740

ASUS43 KGRB 221410

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

900 AM CDT WED JUL 22 2026



WIZ005-009-010>012-018-019-221500-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD         N/A     57  51  80 W6        30.14R

MANITOWISH WTR CLOUDY    56  53  88 NW5       30.13S

ARBOR VITAE    CLOUDY    57  52  83 NW5       30.13S

EAGLE RIVER    CLOUDY    56  52  88 W6        30.12S

LAND O LAKES   CLOUDY    59  51  74 NW6       30.13S

RHINELANDER    CLOUDY    58  50  75 NW6       30.13R

PHILLIPS       PTSUNNY   58  52  79 CALM      30.14S

ANTIGO         SUNNY     60  50  69 NW6       30.13R

TOMAHAWK       SUNNY     60  51  73 NW5       30.14S

MERRILL        SUNNY     59  47  65 N5        30.12S

$$



WIZ013-073-221500-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  CLOUDY    60  52  74 NW9       30.08R

MARINETTE      SUNNY     63  51  65 NW8       30.08R

OCONTO         SUNNY     63  49  60 N8        30.09R

$$



WIZ017-030-035>037-045-221500-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        SUNNY     60  48  65 N6        30.14R

WAUSAU         SUNNY     61  50  67 W7        30.12S

MOSINEE        SUNNY     61  50  67 N8        30.12R

MARSHFIELD     SUNNY     62  50  64 N9        30.13R

WISC RAPIDS    SUNNY     64  48  56 N8        30.13R

STEVENS POINT  SUNNY     64  50  61 N7        30.13S

WAUPACA        SUNNY     66  49  55 NW9       30.14S

SHAWANO          N/A     65  50  58 NW5       30.10S

CLINTONVILLE   SUNNY     63  50  61 NW7       30.12R

WAUTOMA        SUNNY     65  48  54 N9        30.12R

$$



WIZ038-039-048-051-221500-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  SUNNY     63  51  65 NW8       30.08S

APPLETON       SUNNY     64  52  63 N10       30.10R

OSHKOSH        SUNNY     64  49  57 NW10      30.09S

FOND DU LAC    SUNNY     64  49  57 N7        30.10R

$$



WIZ022-050-052-221500-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        SUNNY     62  50  66 N10       30.05S

WASHINGTON ISL SUNNY     63  50  64 NW12      30.04R

STURGEON BAY   SUNNY     63  53  70 N10       30.08R

MANITOWOC      SUNNY     64  52  64 N10       30.08R

SHEBOYGAN      SUNNY     64  49  57 N13       30.08S

$$



LMZ563-521-522-541>543-221500-

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 1400   63     340/ 11/ 14 1018.6R

KEWAUNEE LKSHORE 1324          320/  5/ 11 1017.5

NORTHPORT PIER   1300          290/ 18/ 21 1017.6

N MID LAKE BUOY  1350   59 61  330/ 14/ 17 1016.8R         2/ 3

MENOMINEE LKSHOR 1324   59 73  310/  9/ 13 1017.8

$$

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.