National Weather Service United States Department of Commerce

Lake Winnebago Forecast                                       About these forecasts


Forecast Graphics


+03 Hr

+06 Hr

+09 Hr

+12 Hr

+15 Hr

+18 Hr

+21 Hr

+24 Hr
Lake Winnebago Recreational Forecast
Note: Experimental product. Check product creation time to verify this is a current forecast.

200
SXUS43 KGRB 051950
RECGRB
WIZ048-WIZ049-060900-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
250 PM CDT Sun Oct 5 2025

.REST OF THE AFTERNOON...South winds 15 to 20 knots. Sunny. Waves
1 foot or less. Near steady temperature in the upper 70s.
.TONIGHT...Southwest winds 10 to 15 knots. Chance of showers and
slight chance of thunderstorms after midnight. Waves 1 foot or
less. Lows in the upper 50s.
.MONDAY...Northwest winds 5 to 10 knots. Chance of rain showers.
Waves 1 foot or less. Highs in the mid 60s.
.MONDAY NIGHT...Northwest winds 5 to 10 knots. Chance of rain
showers in the evening. Waves 1 foot or less. Lows in the lower
50s.
.TUESDAY...Northwest winds around 10 knots. Sunny. Waves 1 foot
or less. Highs in the lower 60s.

$$



 

Local Observations
Note: Check product creation time to verify this is a current product.
    
                        
404
ASUS43 KGRB 051959
RWRGRB

NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE GREEN BAY WI
300 PM CDT SUN OCT 05 2025

WIZ005-009-010>012-018-019-052100-
NORTH CENTRAL WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
IRONWOOD MOSUNNY 79 52 38 S21G29 29.73F
MANITOWISH WTR NOT AVBL
ARBOR VITAE SUNNY 77 53 43 SW21G30 29.83F
EAGLE RIVER SUNNY 76 48 36 SW16G24 29.86F
LAND O LAKES SUNNY 77 48 35 S12G22 29.86F
RHINELANDER SUNNY 76 51 41 SW15G31 29.88F
PHILLIPS MOSUNNY 78 54 44 S20G28 29.81F
ANTIGO NOT AVBL
TOMAHAWK NOT AVBL
MERRILL SUNNY 78 53 42 SW15G25 29.87F
$$

WIZ013-073-052100-
NORTHEAST WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
IRON MOUNTAIN NOT AVBL
MARINETTE NOT AVBL
$$

WIZ017-030-035>037-045-052100-
CENTRAL WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
MEDFORD SUNNY 77 51 39 S21 29.87F
WAUSAU SUNNY 78 55 44 S21G31 29.90F
MOSINEE SUNNY 77 57 50 S18G26 29.90F
MARSHFIELD SUNNY 78 53 41 S18G33 29.88F
WISC RAPIDS SUNNY 79 55 43 S16G26 29.93S
STEVENS POINT NOT AVBL
WAUPACA SUNNY 82 54 38 S17G25 29.96F
SHAWANO N/A 82 52 35 S10G17 29.93F
CLINTONVILLE NOT AVBL
WAUTOMA SUNNY 80 56 43 SW18G24 29.93F
$$

WIZ038-039-048-051-052100-
FOX VALLEY

CITY SKY/WX TMP DP RH WIND PRES REMARKS
NWS GREEN BAY MOSUNNY 80 55 42 S17G32 29.95F
APPLETON NOT AVBL
OSHKOSH SUNNY 80 55 42 S21G33 29.96F
FOND DU LAC SUNNY 80 54 40 SW18G31 29.97F
$$

WIZ022-050-052-052100-
EAST CENTRAL WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
EPHRAIM NOT AVBL
WASHINGTON ISL NOT AVBL
STURGEON BAY NOT AVBL
MANITOWOC MOSUNNY 73 61 65 S22G29 29.99F
SHEBOYGAN MOSUNNY 78 59 51 S14G23 29.99F
$$

LMZ563-521-522-541>543-052100-
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)
KEWAUNEE LKSHORE 1930 64 190/ 13/ 15 1014.3F
NORTHPORT PIER 1900 130/ 10/ 24 N/A
N MID LAKE BUOY 1940 67 64 180/ 21/ 25 1014.7F
S GREEN BAY BUOY 1900 73 68 230/ 17/ 21 993.5 3/ 4
MENOMINEE LKSHOR 1930 77 67 190/ 16/ 26 1012.9F
$$



 

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.