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.}

068
SXUS43 KGRB 210226
RECGRB
WIZ048-WIZ049-210330-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
926 PM CDT Mon Apr 20 2026

.TONIGHT...South winds 10 to 15 knots. Partly cloudy late in the
evening then becoming mostly cloudy. Waves less than 1 foot. Near
steady temperature in the lower 40s.
.TUESDAY...Southwest winds 5 to 10 knots veering northwest in the
afternoon. Sunny. Waves less than 1 foot. Highs in the lower 60s.
.TUESDAY NIGHT...East winds 5 to 10 knots. Mostly clear. Waves
less than 1 foot. Lows around 40.
.WEDNESDAY...Southeast winds 5 to 10 knots. Sunny. Waves less
than 1 foot. Highs in the lower 60s.

$$

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

    
                        

894

ASUS43 KGRB 210159

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

900 PM CDT MON APR 20 2026



WIZ005-009-010>012-018-019-210300-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       PTCLDY    49  20  31 SW14G20   29.88R

MANITOWISH WTR NOT AVBL

ARBOR VITAE    NOT AVBL

EAGLE RIVER    PTCLDY    45  14  29 SW7       29.94R

LAND O LAKES   PTCLDY    46  17  31 SW7       29.93R

RHINELANDER    PTCLDY    46  19  34 SW9       29.96S

PHILLIPS       PTCLDY    47  20  33 S12G17    29.94F

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        NOT AVBL

$$



WIZ013-073-210300-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  CLEAR     42  32  67 S10G20    29.95S

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-210300-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        PTCLDY    46  23  40 S9        29.98S

WAUSAU         NOT AVBL

MOSINEE        CLEAR     46  25  42 S12       30.00S

MARSHFIELD     PTCLDY    47  24  40 S8        30.01R

WISC RAPIDS    PTCLDY    50  21  32 S7        30.03S

STEVENS POINT  NOT AVBL

WAUPACA        PTCLDY    49  25  39 S7        30.07S

SHAWANO          N/A     51  22  33 S5        30.03S

CLINTONVILLE   NOT AVBL

WAUTOMA        PTCLDY    50  26  39 S7        30.05F

$$



WIZ038-039-048-051-210300-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  PTCLDY    42  29  59 S14       30.06F

APPLETON       PTCLDY    46  36  66 S9        30.07R

OSHKOSH        PTCLDY    44  30  57 S10       30.07S

FOND DU LAC    PTCLDY    44  30  57 S8        30.08S

$$



WIZ022-050-052-210300-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        NOT AVBL

WASHINGTON ISL NOT AVBL

STURGEON BAY   NOT AVBL

MANITOWOC      MOCLDY    40  30  67 S14G23    30.11F

SHEBOYGAN      MOCLDY    40  28  62 S15       30.11S

$$



LMZ563-521-522-541>543-210300-

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 0100   39     180/ 21/ 23 1020.1F

KEWAUNEE LKSHORE 0124          180/ 20/ 24 1018.7

NORTHPORT PIER   0100   38     130/ 10/ 18 1019.0

MENOMINEE LKSHOR 0124   40 43  170/ 15/ 18 1016.7

$$

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.