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.}

795
SXUS43 KGRB 121125
RECGRB
WIZ048-WIZ049-122100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
625 AM CDT Tue Aug 12 2025

.TODAY...Southwest winds 5 to 10 knots. Showers and slight chance
of thunderstorms in the morning, then chance of thunderstorms in
the afternoon. Waves 1 foot or less. Highs around 80.
.TONIGHT...West winds 5 to 10 knots. Chance of thunderstorms in
the evening. Waves 1 foot or less. Lows in the mid 60s.
.WEDNESDAY...Northwest winds 5 to 10 knots. Sunny. Waves less
than 1 foot. Highs in the upper 70s.
.WEDNESDAY NIGHT...North winds around 5 knots veering east after
midnight. Mostly clear. Waves less than 1 foot. Lows in the mid
60s.

$$

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

    
                        

624

ASUS43 KGRB 121112

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

600 AM CDT TUE AUG 12 2025



WIZ005-009-010>012-018-019-121200-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       PTCLDY    64  62  93 S6        29.85S

MANITOWISH WTR MOCLDY    60  60 100 S3        29.88F FOG

ARBOR VITAE    CLEAR     61  60  97 SW3       29.90R FOG

EAGLE RIVER    CLEAR     61  61 100 SW3       29.89S FOG

LAND O LAKES   CLEAR     61  61 100 CALM      29.90R FOG

RHINELANDER    PTCLDY    63  61  93 SW6       29.90F

PHILLIPS       PTCLDY    62  62 100 SW5       29.89S

ANTIGO         PTCLDY    62  62  99 S3        29.93S

TOMAHAWK       PTCLDY    62  59  89 MISG      29.90S

MERRILL        PTCLDY    64  64 100 S5        29.89F

$$



WIZ013-073-121200-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  PTCLDY    66  63  90 VRB5      29.87F

MARINETTE      MOCLDY    70  70 100 W3        29.90F

OCONTO         MOCLDY    68  68  99 SW5       29.90S

$$



WIZ017-030-035>037-045-121200-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        PTCLDY    62  61  97 S7        29.90F

WAUSAU         PTCLDY    66  64  93 S6        29.91F

MOSINEE        CLEAR     64  63  94 S8        29.92S

MARSHFIELD     PTCLDY    64  63  96 S7        29.93S FOG

WISC RAPIDS    CLOUDY    68  67  96 SW7       29.93F

STEVENS POINT  MOCLDY    69  68  96 SW3       29.93F

WAUPACA        CLOUDY    72  70  93 CALM      29.96S

SHAWANO        CLOUDY    71  69  94 CALM      29.92S

CLINTONVILLE   CLOUDY    69  68  97 S3        29.93F

WAUTOMA        CLOUDY    70  68  93 CALM      29.94S

$$



WIZ038-039-048-051-121200-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  CLOUDY    72  70  93 SW7       29.91S

APPLETON       PTCLDY    72  66  83 SW7       29.93F

OSHKOSH        LGT RAIN  67  64  90 S7        29.93S

FOND DU LAC    LGT RAIN  68  66  93 S7        29.94S

$$



WIZ022-050-052-121200-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        MOCLDY    71  69  93 SW3       29.89F

WASHINGTON ISL MOCLDY    70  70 100 SW6       29.89S

STURGEON BAY   MOCLDY    71  69  93 SW7       29.91F

MANITOWOC      CLOUDY    72  67  84 SW9       29.92F

SHEBOYGAN      RAIN      69  66  90 CALM      29.94S FOG

$$



LMZ563-521-522-541>543-121200-

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 1100   73     260/  7/  9 1013.1R

KEWAUNEE LKSHORE 1024   71     200/  6/  8 1011.6

NORTHPORT PIER   1000          150/  3/  6   N/A

N MID LAKE BUOY  1050   73 72  210/ 14/ 17 1011.8F         3/ 4

S GREEN BAY BUOY 1030   75 75  250/ 16/ 17  992.1F         1/ 3

CHAMBERS ISLAND  1040   73     160/  5/  9   N/A

MENOMINEE LKSHOR 1024   72 71  220/  6/ 11 1011.6

$$

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.