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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.

687
SXUS43 KGRB 171106
RECGRB
WIZ048-WIZ049-172100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
606 AM CDT Fri Apr 17 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING...
...FLOOD WATCH IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH
SATURDAY MORNING...

.TODAY...South winds 5 to 15 knots rising to 15 to 20 knots in
the afternoon. Areas of dense fog in the morning. chance of
thunderstorms in the afternoon. Waves less than 1 foot. Highs in
the upper 60s.
.TONIGHT...South winds 15 to 20 knots veering west after
midnight. Rain showers in the evening. Chance of thunderstorms
through the night. Waves less than 1 foot. Lows in the upper 30s.
.SATURDAY...West winds 15 to 20 knots. Slight chance of rain
showers and snow showers in the morning. Waves less than 1 foot.
Highs in the lower 40s.
.SATURDAY NIGHT...West winds 10 to 20 knots. Mostly clear. Waves
less than 1 foot. Lows in the lower 30s.

$$



 

Local Observations
Note: Check product creation time to verify this is a current product.
    
                        
017
ASUS43 KGRB 171210
RWRGRB

NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE GREEN BAY WI
700 AM CDT FRI APR 17 2026

WIZ005-009-010>012-018-019-171300-
NORTH CENTRAL WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
IRONWOOD PTCLDY 59 46 62 S17G29 29.70F
MANITOWISH WTR PTCLDY 55 47 76 S10 29.78S
ARBOR VITAE PTCLDY 52 47 82 SE7 29.79S
EAGLE RIVER PTCLDY 51 47 85 S5 29.81S
LAND O LAKES PTCLDY 52 46 80 S7 29.82S
RHINELANDER PTCLDY 53 48 83 S6 29.81F
PHILLIPS PTCLDY 56 48 75 S9G16 29.76S
ANTIGO CLOUDY 50 50 100 S9 29.85S FOG
TOMAHAWK PTCLDY 54 50 87 MISG 29.81S
MERRILL NOT AVBL
$$

WIZ013-073-171300-
NORTHEAST WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
IRON MOUNTAIN CLOUDY 49 49 100 SE8 29.84R FOG
MARINETTE LGT RAIN 45 45 100 S5 29.90R VSB 1/4
OCONTO CLOUDY 46 46 98 S5 29.88S VSB<1/4
$$

WIZ017-030-035>037-045-171300-
CENTRAL WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
MEDFORD PTCLDY 54 49 84 SE9 29.78S
WAUSAU PTCLDY 53 51 93 E7 29.82S
MOSINEE CLEAR 54 52 94 SE9 29.82S
MARSHFIELD CLEAR 54 51 90 S9 29.79S
WISC RAPIDS CLEAR 53 51 93 SE7 29.81F
STEVENS POINT CLEAR 53 52 97 E5 29.83F FOG
WAUPACA FOG 54 53 96 SE8 29.89S VSB 1/4
SHAWANO CLOUDY 51 51 100 S3 29.87S FOG
CLINTONVILLE CLOUDY 52 52 100 S7 29.88S FOG
WAUTOMA CLOUDY 54 53 97 SE7 29.86S FOG
$$

WIZ038-039-048-051-171300-
FOX VALLEY

CITY SKY/WX TMP DP RH WIND PRES REMARKS
NWS GREEN BAY FOG 47 47 100 CALM 29.88S VSB 1/4
APPLETON PTCLDY 48 48 100 VRB3 29.88R
OSHKOSH CLEAR 51 50 96 S8 29.87R FOG
FOND DU LAC CLEAR 52 51 97 S8 29.88R
$$

WIZ022-050-052-171300-
EAST CENTRAL WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
EPHRAIM FOG 43 42 97 S9 29.88F VSB<1/4
WASHINGTON ISL FOG 40 38 95 S8 29.89F VSB 1/2
STURGEON BAY LGT RAIN 45 44 97 S13 29.90S VSB 1/2
MANITOWOC FOG 41 41 100 S12 29.92R VSB 1/4
SHEBOYGAN FOG 43 43 100 S8 29.91S VSB 1/4
$$

LMZ563-521-522-541>543-171300-
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 1200 39 170/ 14/ 15 1013.6R
KEWAUNEE LKSHORE 1130 170/ 11/ 13 1012.3F
NORTHPORT PIER 1100 41 130/ 4/ 6 1013.2
MENOMINEE LKSHOR 1130 42 42 150/ 9/ 12 1011.2F
$$



 

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.