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.}

833
SXUS43 KGRB 190216
RECGRB
WIZ048-WIZ049-190330-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
916 PM CDT Tue Aug 18 2026

...SEVERE THUNDERSTORM WATCH 595 IN EFFECT UNTIL 10 PM CDT THIS
EVENING...

.TONIGHT...Northwest winds 5 to 10 knots veering north after
midnight. Slight chance of thunderstorms late in the evening.
Waves 1 foot or less. Lows in the lower 60s.
.WEDNESDAY...Northwest winds around 5 knots. Sunny. Waves 1 foot
or less. Highs in the upper 70s.
.WEDNESDAY NIGHT...West winds around 5 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.

$$

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

    
                        

816

ASUS43 KGRB 190259

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

1000 PM CDT TUE AUG 18 2026



WIZ005-009-010>012-018-019-190400-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       PTCLDY    50  50 100 W3        29.94R

MANITOWISH WTR NOT AVBL

ARBOR VITAE    NOT AVBL

EAGLE RIVER    NOT AVBL

LAND O LAKES   NOT AVBL

RHINELANDER    PTCLDY    61  48  62 CALM      29.96R

PHILLIPS       NOT AVBL

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        NOT AVBL

$$



WIZ013-073-190400-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  CLEAR     60  47  61 N5        29.90R

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-190400-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        NOT AVBL

WAUSAU         NOT AVBL

MOSINEE        PTCLDY    68  57  68 N7        29.91R

MARSHFIELD     PTCLDY    66  57  72 NW5       29.93R

WISC RAPIDS    PTCLDY    66  64  93 W7        29.92R

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        FOG       62  62 100 CALM      29.91  VSB 1/2

$$



WIZ038-039-048-051-190400-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  CLOUDY    68  64  87 SE6       29.86R

APPLETON       MOCLDY    66  64  94 W8        29.88R

OSHKOSH        PTCLDY    64  62  93 VRB6      29.88R

FOND DU LAC    PTCLDY    63  61  93 SW9       29.90R

$$



WIZ022-050-052-190400-

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    67  66  97 SW7       29.88S

SHEBOYGAN      MOCLDY    62  61  96 SW6       29.89R

$$



LMZ563-521-522-541>543-190400-

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 0200   67     240/ 10/ 11 1011.1R

KEWAUNEE LKSHORE 0206          250/  5/  8 1010.3

NORTHPORT PIER   0200          360/  6     1011.5

N MID LAKE BUOY  0240   70 71   30/ 17/ 19 1010.8R

MENOMINEE LKSHOR 0206   70 76   10/  8/  9 1010.8

$$

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.