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.}

687
SXUS43 KGRB 171106
RECGRB
WIZ048-WIZ049-172100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
606 AM CDT Fri Apr 17 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING...
...FLOOD WATCH IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH
SATURDAY MORNING...

.TODAY...South winds 5 to 15 knots rising to 15 to 20 knots in
the afternoon. Areas of dense fog in the morning. chance of
thunderstorms in the afternoon. Waves less than 1 foot. Highs in
the upper 60s.
.TONIGHT...South winds 15 to 20 knots veering west after
midnight. Rain showers in the evening. Chance of thunderstorms
through the night. Waves less than 1 foot. Lows in the upper 30s.
.SATURDAY...West winds 15 to 20 knots. Slight chance of rain
showers and snow showers in the morning. Waves less than 1 foot.
Highs in the lower 40s.
.SATURDAY NIGHT...West winds 10 to 20 knots. Mostly clear. Waves
less than 1 foot. Lows in the lower 30s.

$$

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

    
                        

017

ASUS43 KGRB 171210

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

700 AM CDT FRI APR 17 2026



WIZ005-009-010>012-018-019-171300-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       PTCLDY    59  46  62 S17G29    29.70F

MANITOWISH WTR PTCLDY    55  47  76 S10       29.78S

ARBOR VITAE    PTCLDY    52  47  82 SE7       29.79S

EAGLE RIVER    PTCLDY    51  47  85 S5        29.81S

LAND O LAKES   PTCLDY    52  46  80 S7        29.82S

RHINELANDER    PTCLDY    53  48  83 S6        29.81F

PHILLIPS       PTCLDY    56  48  75 S9G16     29.76S

ANTIGO         CLOUDY    50  50 100 S9        29.85S FOG

TOMAHAWK       PTCLDY    54  50  87 MISG      29.81S

MERRILL        NOT AVBL

$$



WIZ013-073-171300-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  CLOUDY    49  49 100 SE8       29.84R FOG

MARINETTE      LGT RAIN  45  45 100 S5        29.90R VSB 1/4

OCONTO         CLOUDY    46  46  98 S5        29.88S VSB<1/4

$$



WIZ017-030-035>037-045-171300-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        PTCLDY    54  49  84 SE9       29.78S

WAUSAU         PTCLDY    53  51  93 E7        29.82S

MOSINEE        CLEAR     54  52  94 SE9       29.82S

MARSHFIELD     CLEAR     54  51  90 S9        29.79S

WISC RAPIDS    CLEAR     53  51  93 SE7       29.81F

STEVENS POINT  CLEAR     53  52  97 E5        29.83F FOG

WAUPACA        FOG       54  53  96 SE8       29.89S VSB 1/4

SHAWANO        CLOUDY    51  51 100 S3        29.87S FOG

CLINTONVILLE   CLOUDY    52  52 100 S7        29.88S FOG

WAUTOMA        CLOUDY    54  53  97 SE7       29.86S FOG

$$



WIZ038-039-048-051-171300-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  FOG       47  47 100 CALM      29.88S VSB 1/4

APPLETON       PTCLDY    48  48 100 VRB3      29.88R

OSHKOSH        CLEAR     51  50  96 S8        29.87R FOG

FOND DU LAC    CLEAR     52  51  97 S8        29.88R

$$



WIZ022-050-052-171300-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        FOG       43  42  97 S9        29.88F VSB<1/4

WASHINGTON ISL FOG       40  38  95 S8        29.89F VSB 1/2

STURGEON BAY   LGT RAIN  45  44  97 S13       29.90S VSB 1/2

MANITOWOC      FOG       41  41 100 S12       29.92R VSB 1/4

SHEBOYGAN      FOG       43  43 100 S8        29.91S VSB 1/4

$$



LMZ563-521-522-541>543-171300-

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 1200   39     170/ 14/ 15 1013.6R

KEWAUNEE LKSHORE 1130          170/ 11/ 13 1012.3F

NORTHPORT PIER   1100   41     130/  4/  6 1013.2

MENOMINEE LKSHOR 1130   42 42  150/  9/ 12 1011.2F

$$

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.