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.}

704
SXUS43 KGRB 141155
RECGRB
WIZ048-WIZ049-142100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
655 AM CDT Sun Sep 14 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING...

.TODAY...East winds up to 10 knots. Areas of dense fog in the
morning. Waves less than 1 foot. Highs in the upper 70s.
.TONIGHT...East winds 5 to 10 knots. Mostly clear. Waves less
than 1 foot. Lows in the lower 60s.
.MONDAY...Southeast winds 5 to 10 knots. Sunny. Waves less than
1 foot. Highs in the upper 70s.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Mostly clear.
Waves less than 1 foot. Lows in the lower 60s.

$$

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

    
                        

605

ASUS43 KGRB 141159

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

700 AM CDT SUN SEP 14 2025



WIZ005-009-010>012-018-019-141300-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       CLEAR     59  59 100 E6        30.08R

MANITOWISH WTR NOT AVBL

ARBOR VITAE    NOT AVBL

EAGLE RIVER    NOT AVBL

LAND O LAKES   NOT AVBL

RHINELANDER    CLOUDY    60  60 100 S3        30.12R FOG

PHILLIPS       CLOUDY    60  60 100 SE6       30.08S FOG

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        CLOUDY    62  62 100 SE5       30.09R FOG

$$



WIZ013-073-141300-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  FOG       58  58 100 CALM      30.11R VSB<1/4

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-141300-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        CLOUDY    61  60  97 SE6       30.08S

WAUSAU         CLOUDY    62  61  96 E8        30.09S FOG

MOSINEE        CLOUDY    63  61  94 E8        30.09R FOG

MARSHFIELD     CLOUDY    63  61  93 SE8       30.07S FOG

WISC RAPIDS    CLOUDY    63  61  93 SE8       30.08R FOG

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        FOG       62  62 100 E5        30.09R VSB 1

$$



WIZ038-039-048-051-141300-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  CLEAR     56  56 100 N3        30.09R FOG

APPLETON       CLEAR     61  61 100 N3        30.09R HAZE

OSHKOSH        MOCLDY    57  57 100 CALM      30.08R

FOND DU LAC    FOG       60  60 100 CALM      30.08R VSB<1/4

$$



WIZ022-050-052-141300-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        NOT AVBL

WASHINGTON ISL NOT AVBL

STURGEON BAY   NOT AVBL

MANITOWOC      FOG       55  55 100 NW3       30.10R VSB 1/4

SHEBOYGAN      FOG       56  56 100 CALM      30.08R VSB<1/4

$$



LMZ563-521-522-541>543-141300-

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 1118   58      CALM  /  3 1017.5

NORTHPORT PIER   1100             CALM       N/A

N MID LAKE BUOY  1140   63 62   50/  6/  6 1019.3R

S GREEN BAY BUOY 1100   64 65   80/  4/  4  998.3          0

MENOMINEE LKSHOR 1118   61 64  320/  3/  3 1018.3

$$

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.