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.}

775
SXUS43 KGRB 181956
RECGRB
WIZ048-WIZ049-190900-

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

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

.REST OF THE AFTERNOON...West winds around 10 knots. Chance of
thunderstorms. Waves 1 foot or less. Near steady temperature in
the mid 70s.
.TONIGHT...West winds 5 to 10 knots veering north after midnight.
Chance of thunderstorms 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.}

    
                        

679

ASUS43 KGRB 181959

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

300 PM CDT TUE AUG 18 2026



WIZ005-009-010>012-018-019-182100-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       MOSUNNY   72  50  45 NW13G18   29.92F

MANITOWISH WTR NOT AVBL

ARBOR VITAE    NOT AVBL

EAGLE RIVER    NOT AVBL

LAND O LAKES   NOT AVBL

RHINELANDER    PTSUNNY   77  54  44 W8        29.89F

PHILLIPS       PTSUNNY   78  56  47 NW3       29.89F

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        PTSUNNY   81  56  42 W10       29.88F

$$



WIZ013-073-182100-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  MOSUNNY   79  57  46 N6        29.84F

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-182100-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        PTSUNNY   76  59  55 W10G18    29.90F

WAUSAU         NOT AVBL

MOSINEE        PTSUNNY   75  64  69 W6        29.89F

MARSHFIELD     PTSUNNY   77  63  61 NW5       29.88F

WISC RAPIDS    PTSUNNY   78  64  61 SE6       29.88F

STEVENS POINT  NOT AVBL

WAUPACA        CLOUDY    81  64  56 SW6       29.91F

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA        MOSUNNY   80  65  59 S6        29.88F

$$



WIZ038-039-048-051-182100-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  PTSUNNY   78  66  66 VRB6      29.87F

APPLETON       PTSUNNY   81  66  61 SW6       29.89F

OSHKOSH        MOSUNNY   78  66  66 W6        29.88F

FOND DU LAC    PTSUNNY   79  67  66 W6        29.88F

$$



WIZ022-050-052-182100-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        NOT AVBL

WASHINGTON ISL NOT AVBL

STURGEON BAY   NOT AVBL

MANITOWOC      PTSUNNY   80  65  59 SW10      29.88F

SHEBOYGAN      PTSUNNY   81  67  62 W10       29.88F

$$



LMZ563-521-522-541>543-182100-

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 1900   80     230/ 11/ 13 1012.1S

KEWAUNEE LKSHORE 1906          250/  4/  7 1011.7

NORTHPORT PIER   1900          300/  2/  6 1011.5

N MID LAKE BUOY  1910   72 71  240/  8/ 10 1010.9

MENOMINEE LKSHOR 1912      76  180/  7/ 12 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.