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Lake Winnebago Forecast                                       About these forecasts


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Lake Winnebago Recreational Forecast
Note: Experimental product. Check product creation time to verify this is a current forecast.

229
SXUS43 KGRB 190319
RECGRB
WIZ048-WIZ049-190430-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
1019 PM CDT Sat Oct 18 2025

.TONIGHT...Northwest winds 5 to 10 knots veering north 10 to
20 knots after midnight. Slight chance of thunderstorms late in
the evening, then rain showers likely after midnight. Waves
1 foot or less. Lows around 50.
.SUNDAY...Northwest winds 15 to 25 knots. Rain showers likely in
the morning. Waves 2 to 4 feet. Highs in the mid 50s.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots backing west 5 to
10 knots after midnight. Mostly clear. Waves 1 to 2 feet. Lows in
the mid 40s.
.MONDAY...South winds 5 to 15 knots. Sunny. Waves 1 foot or less.
Highs around 60.

$$



 

Local Observations
Note: Check product creation time to verify this is a current product.
    
                        
461
ASUS43 KGRB 190259
RWRGRB

NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE GREEN BAY WI
1000 PM CDT SAT OCT 18 2025

WIZ005-009-010>012-018-019-190400-
NORTH CENTRAL WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
IRONWOOD CLOUDY 43 41 93 W5 29.70R
MANITOWISH WTR NOT AVBL
ARBOR VITAE MOCLDY 48 43 84 CALM 29.68F
EAGLE RIVER NOT AVBL
LAND O LAKES NOT AVBL
RHINELANDER CLOUDY 52 43 71 N6 29.69R
PHILLIPS MOCLDY 49 41 73 CALM 29.69S
ANTIGO NOT AVBL
TOMAHAWK NOT AVBL
MERRILL CLOUDY 55 45 68 N7 29.65S
$$

WIZ013-073-190400-
NORTHEAST WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
IRON MOUNTAIN CLOUDY 55 48 77 N9 29.63S
MARINETTE NOT AVBL
$$

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

CITY SKY/WX TMP DP RH WIND PRES REMARKS
MEDFORD CLOUDY 53 40 62 NW8 29.68R
WAUSAU CLOUDY 57 44 62 NW10 29.65R
MOSINEE CLOUDY 57 45 62 NW10G17 29.65R
MARSHFIELD CLOUDY 54 42 64 NW17 29.67R
WISC RAPIDS CLOUDY 58 45 62 NW16G23 29.65R
STEVENS POINT NOT AVBL
WAUPACA CLOUDY 62 47 58 NW5 29.63S
SHAWANO NOT AVBL
CLINTONVILLE NOT AVBL
WAUTOMA CLOUDY 60 48 64 NW9 29.61F
$$

WIZ038-039-048-051-190400-
FOX VALLEY

CITY SKY/WX TMP DP RH WIND PRES REMARKS
NWS GREEN BAY CLOUDY 57 50 77 CALM 29.59F
APPLETON MOCLDY 64 46 52 N7 29.60F
OSHKOSH RAIN 59 51 75 W8 29.61R
FOND DU LAC CLOUDY 61 51 70 NW10G20 29.59F
$$

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 CLOUDY 57 56 96 E3 29.59F
SHEBOYGAN CLOUDY 57 54 89 NE3 29.57F
$$

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 64 190/ 6/ 6 1002.2S
KEWAUNEE LKSHORE 0224 60 300/ 2/ 3 1001.0
NORTHPORT PIER 0200 150/ 4 N/A
N MID LAKE BUOY 0240 60 190/ 10/ 12 N/A
S GREEN BAY BUOY 0200 62 61 220/ 4/ 4 982.0 0
MENOMINEE LKSHOR 0224 64 59 270/ 4/ 6 1001.5
$$



 

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.