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.}

161
SXUS43 KGRB 151126
RECGRB
WIZ048-WIZ049-152100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
626 AM CDT Sat Aug 15 2026

.TODAY...Southeast winds 5 to 15 knots. Mostly cloudy. Waves
1 foot or less. Highs in the upper 70s.
.TONIGHT...Southeast winds 5 to 10 knots veering southwest after
midnight. Slight chance of thunderstorms after midnight. Waves
1 foot or less. Lows in the upper 60s.
.SUNDAY...Northwest winds 5 to 10 knots. Mostly cloudy in the
morning then becoming mostly sunny. Waves 1 foot or less. Highs
in the lower 80s.
.SUNDAY NIGHT...North 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.}

    
                        

326

ASUS43 KGRB 151310

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

800 AM CDT SAT AUG 15 2026



WIZ005-009-010>012-018-019-151400-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       CLOUDY    64  53  67 E5        30.15F

MANITOWISH WTR CLOUDY    63  51  64 SE6       30.17F

ARBOR VITAE    CLOUDY    63  50  63 SE6       30.17F

EAGLE RIVER    CLOUDY    62  47  59 E6        30.18F

LAND O LAKES   CLOUDY    62  49  63 SE6       30.21F

RHINELANDER    CLOUDY    63  52  67 E6        30.18F

PHILLIPS       CLOUDY    64  54  70 E3        30.15F

ANTIGO         CLOUDY    64  58  81 E6        30.18S

TOMAHAWK       CLOUDY    65  54  66 E3        30.16F

MERRILL        CLOUDY    65  53  65 E5        30.14F

$$



WIZ013-073-151400-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  PTSUNNY   59  55  87 CALM      30.17F

MARINETTE      MOSUNNY   66  63  90 NE6       30.16F

OCONTO         PTSUNNY   66  64  94 NE6       30.15F

$$



WIZ017-030-035>037-045-151400-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        CLOUDY    64  55  74 E7        30.14F

WAUSAU         CLOUDY    66  58  75 E7        30.14F

MOSINEE          N/A     64  59  82 E9        30.15S

MARSHFIELD     CLOUDY    66  58  75 E10       30.11F

WISC RAPIDS    CLOUDY    67  59  75 E6        30.12F

STEVENS POINT  CLOUDY    67  60  78 E7        30.14S

WAUPACA        PTSUNNY   69  62  78 NE7       30.15F

SHAWANO        CLOUDY    67  60  79 NE7       30.15F

CLINTONVILLE   PTSUNNY   65  61  88 NE6       30.15F

WAUTOMA        CLOUDY    65  59  81 NE6       30.12F

$$



WIZ038-039-048-051-151400-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  PTSUNNY   69  63  81 E6        30.13F

APPLETON       MOSUNNY   72  64  78 E7        30.13F

OSHKOSH        CLOUDY    71  65  81 E8        30.11F

FOND DU LAC    PTSUNNY   69  64  84 E6        30.11F

$$



WIZ022-050-052-151400-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        MOSUNNY   67  65  93 E5        30.16F

WASHINGTON ISL PTSUNNY   68  65  89 CALM      30.16F

STURGEON BAY   PTSUNNY   69  64  84 E6        30.17S

MANITOWOC      PTSUNNY   70  69  97 NE3       30.14F

SHEBOYGAN      CLOUDY    70  67  90 E6        30.12F

$$



LMZ563-521-522-541>543-151400-

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 1300   71      90/  7/  8 1019.8F

KEWAUNEE LKSHORE 1224           90/  6/  7 1020.6

NORTHPORT PIER   1200           50/ 10/ 11 1022.4

N MID LAKE BUOY  1240   70 70  100/  8/ 10 1021.4F

MENOMINEE LKSHOR 1224   69 75   50/ 12/ 13 1021.2

$$

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.