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.}

439
SXUS43 KGRB 311646
RECGRB
WIZ048-WIZ049-312100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
1146 AM CDT Fri Jul 31 2026

.THIS AFTERNOON...South winds 5 to 10 knots. Showers likely and
slight chance of thunderstorms in the afternoon. Waves 1 foot or
less. Highs in the upper 70s.
.TONIGHT...Northeast winds 10 to 20 knots. Showers likely in the
evening. Slight chance of thunderstorms through the night.
Showers after midnight. Waves 1 to 2 feet. Lows in the mid 60s.
.SATURDAY...Northeast winds 10 to 20 knots. Chance of showers and
slight chance of thunderstorms through the day. Waves 2 to 4 feet
subsiding to 1 to 3 feet in the afternoon. Highs in the lower
70s.
.SATURDAY NIGHT...Northeast winds 10 to 15 knots. Patchy smoke in
the evening. Waves 1 foot or less building to 2 to 4 feet after
midnight. Lows in the lower 60s.

$$

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

    
                        

553

ASUS43 KGRB 311759

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

100 PM CDT FRI JUL 31 2026



WIZ005-009-010>012-018-019-311900-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       PTSUNNY   69  66  90 SW10      30.00F

MANITOWISH WTR NOT AVBL

ARBOR VITAE    LGT RAIN  68  67  95 N6        30.01F

EAGLE RIVER    NOT AVBL

LAND O LAKES   NOT AVBL

RHINELANDER    CLOUDY    68  64  87 N5        30.00F

PHILLIPS       NOT AVBL

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        NOT AVBL

$$



WIZ013-073-311900-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  PTSUNNY   74  67  78 NW6       29.97S

MARINETTE      NOT AVBL

$$



WIZ017-030-035>037-045-311900-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        PTSUNNY   70  67  90 NE7       29.98S

WAUSAU         NOT AVBL

MOSINEE        NOT AVBL

MARSHFIELD     LGT RAIN  71  64  78 S8        29.96R

WISC RAPIDS    LGT RAIN  69  65  86 S6        29.96S

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        NOT AVBL

CLINTONVILLE   NOT AVBL

WAUTOMA          N/A    N/A N/A N/A MISG        N/A

$$



WIZ038-039-048-051-311900-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  PTSUNNY   76  67  73 SW3       29.96S

APPLETON       SUNNY     77  66  69 S7        29.97F

OSHKOSH        PTSUNNY   75  65  70 SE7       29.95F

FOND DU LAC    PTSUNNY   75  64  68 SE9       29.96F

$$



WIZ022-050-052-311900-

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   76  65  68 S10       29.97S

SHEBOYGAN      PTSUNNY   74  64  71 S8        29.97F

$$



LMZ563-521-522-541>543-311900-

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 1700   71     180/ 11/ 11 1014.9R

KEWAUNEE LKSHORE 1724          180/  4/  5 1014.2

NORTHPORT PIER   1700          260/  5/  8 1014.6

N MID LAKE BUOY  1740   68 67  240/  4/  6 1014.0R

MENOMINEE LKSHOR 1724   76 71  260/  5/  7 1014.2

$$

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.