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.}

334
SXUS43 KGRB 040851
RECGRB
WIZ048-WIZ049-042100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
351 AM CDT Sat Jul 4 2026

.EARLY THIS MORNING...Northwest winds 5 to 10 knots. Patchy fog.
Waves less than 1 foot. Near steady temperature in the lower 70s.
.TODAY...Northeast winds 5 to 10 knots. Slight chance of
thunderstorms in the afternoon. Waves 1 foot or less. Highs in
the upper 70s.
.TONIGHT...Northeast winds 5 to 10 knots. Slight chance of
thunderstorms. Waves 1 foot or less. Lows in the mid 60s.
.SUNDAY...Northeast winds 5 to 10 knots. Mostly sunny. Waves
1 foot or less. Highs in the upper 70s.
.SUNDAY NIGHT...Northeast winds 5 to 10 knots. Mostly clear.
Waves 1 foot or less. Lows in the lower 60s.

$$

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

    
                        

084

ASUS43 KGRB 040910

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

400 AM CDT SAT JUL 04 2026



WIZ005-009-010>012-018-019-041000-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       MOCLDY    62  62 100 CALM      30.05R

MANITOWISH WTR MOCLDY    64  64 100 CALM      30.04R

ARBOR VITAE    CLOUDY    65  64  97 CALM      30.03S

EAGLE RIVER    CLOUDY    64  64 100 CALM      30.04R

LAND O LAKES   MOCLDY    65  65 100 CALM      30.07R

RHINELANDER    CLOUDY    65  63  93 CALM      30.04R

PHILLIPS       FOG       62  62 100 CALM      30.02S VSB 3/4

ANTIGO         CLOUDY    61  61  99 CALM      30.03R

TOMAHAWK       CLOUDY    64  63  96 CALM      30.04R

MERRILL        MOCLDY    63  61  93 CALM      30.02R

$$



WIZ013-073-041000-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  MOCLDY    64  61  90 NW3       30.00R

MARINETTE      CLOUDY    67  61  81 N6        30.00R

OCONTO         CLOUDY    67  67  98 CALM      29.99R

$$



WIZ017-030-035>037-045-041000-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        MOCLDY    64  63  97 CALM      30.02S

WAUSAU         MOCLDY    67  64  90 CALM      30.01R

MOSINEE        CLOUDY    66  64  94 N8        30.01R

MARSHFIELD     MOCLDY    66  63  90 NE3       30.00R

WISC RAPIDS    MOCLDY    68  68 100 NE7       29.99S

STEVENS POINT  PTCLDY    67  67  98 CALM      30.00S

WAUPACA        MOCLDY    68  66  93 CALM      30.02R

SHAWANO        MOCLDY    69  62  80 N7        29.99R

CLINTONVILLE   MOCLDY    66  64  94 CALM      30.00S

WAUTOMA        MOCLDY    68  67  96 CALM      29.98S

$$



WIZ038-039-048-051-041000-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  MOCLDY    70  67  90 NE7       29.97R

APPLETON       MOCLDY    72  68  88 NE7       29.98S

OSHKOSH        PTCLDY    70  68  93 NW5       29.96S

FOND DU LAC    PTCLDY    69  68  96 CALM      29.97S

$$



WIZ022-050-052-041000-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        CLOUDY    66  65  96 NE5       29.97R

WASHINGTON ISL CLOUDY    66  63  89 NE6       29.97S

STURGEON BAY   CLOUDY    69  66  90 CALM      29.99R

MANITOWOC      PTCLDY    68  68 100 CALM      29.97R FOG

SHEBOYGAN      MOCLDY    68  67  96 N5        29.96S

$$



LMZ563-521-522-541>543-041000-

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 0900   67     250/  3/  4 1014.5R

KEWAUNEE LKSHORE 0824           20/  4/  6 1014.1

NORTHPORT PIER   0800          360/  8     1015.6

N MID LAKE BUOY  0850   65 64   10/ 10/ 12 1014.6R         1/ 5

MENOMINEE LKSHOR 0824   65 73   20/  8/  9 1014.8

$$

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.