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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.

553
SXUS43 KGRB 192231
RECGRB
WIZ048-WIZ049-200900-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
531 PM CDT Sun Apr 19 2026

.REST OF THE AFTERNOON...Northwest winds 10 to 15 knots. Partly
sunny. Waves less than 1 foot. Near steady temperature in the mid
40s.
.TONIGHT...North winds 5 to 10 knots veering northeast after
midnight. Mostly cloudy in the evening then clearing. Waves less
than 1 foot. Lows in the mid 20s.
.MONDAY...South winds 5 to 10 knots. Sunny. Waves less than
1 foot. Highs in the upper 40s.
.MONDAY NIGHT...South winds 10 to 15 knots. Partly cloudy. Waves
less than 1 foot. Lows in the upper 30s.
.TUESDAY...West winds 5 to 10 knots. Sunny. Waves less than
1 foot. Highs in the mid 60s.

$$



 

Local Observations
Note: Check product creation time to verify this is a current product.
    
                        
788
ASUS43 KGRB 192310
RWRGRB

NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE GREEN BAY WI
600 PM CDT SUN APR 19 2026

WIZ005-009-010>012-018-019-200000-
NORTH CENTRAL WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
IRONWOOD SUNNY 34 10 37 N9 30.20S
MANITOWISH WTR SUNNY 35 7 31 NW9 30.16S
ARBOR VITAE SUNNY 36 8 30 N14G22 30.16R
EAGLE RIVER SUNNY 35 2 25 NW13G21 30.16R
LAND O LAKES SUNNY 34 5 29 NW14 30.19R
RHINELANDER SUNNY 37 9 31 N8 30.16R
PHILLIPS PTSUNNY 37 11 34 N7 30.16R
ANTIGO PTSUNNY 39 14 35 NW16G23 30.15R
TOMAHAWK MOSUNNY 40 9 28 MISG 30.16S
MERRILL NOT AVBL
$$

WIZ013-073-200000-
NORTHEAST WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
IRON MOUNTAIN MOSUNNY 37 13 37 N16G25 30.14R
MARINETTE CLOUDY 41 14 33 NE8 30.16R
OCONTO CLOUDY 41 11 28 NW5 30.15R
$$

WIZ017-030-035>037-045-200000-
CENTRAL WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
MEDFORD PTSUNNY 40 13 32 NW12 30.15S
WAUSAU CLOUDY 42 11 28 NW8G20 30.15R
MOSINEE CLOUDY 41 12 30 NW16 30.15R
MARSHFIELD PTSUNNY 41 16 36 NW13 30.17R
WISC RAPIDS MOSUNNY 43 12 28 N13G23 30.17R
STEVENS POINT MOSUNNY 43 12 28 NW10 30.16S
WAUPACA PTSUNNY 47 11 24 W12G20 30.19R
SHAWANO CLOUDY 44 9 23 N12G18 30.15R
CLINTONVILLE CLOUDY 44 13 29 NW15 30.17R
WAUTOMA MOSUNNY 45 14 28 NW15 30.17
$$

WIZ038-039-048-051-200000-
FOX VALLEY

CITY SKY/WX TMP DP RH WIND PRES REMARKS
NWS GREEN BAY CLOUDY 43 19 38 NW10G23 30.15R
APPLETON PTSUNNY 45 18 33 NW10 30.15R
OSHKOSH CLOUDY 45 18 34 NW14G25 30.14R
FOND DU LAC PTSUNNY 44 18 35 NW15 30.15R
$$

WIZ022-050-052-200000-
EAST CENTRAL WISCONSIN

CITY SKY/WX TMP DP RH WIND PRES REMARKS
EPHRAIM PTSUNNY 36 14 40 N5 30.15R
WASHINGTON ISL PTSUNNY 37 18 47 N13 30.17R
STURGEON BAY CLOUDY 36 23 59 SE7 30.17R
MANITOWOC PTSUNNY 36 27 69 E8 30.18R
SHEBOYGAN CLOUDY 37 27 67 E7 30.16R
$$

LMZ563-521-522-541>543-200000-
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 2300 35 80/ 11/ 12 1021.9R
KEWAUNEE LKSHORE 2224 120/ 7/ 8 1021.0
NORTHPORT PIER 2200 320/ 13/ 16 1021.7
MENOMINEE LKSHOR 2224 41 43 270/ 9/ 17 1020.2
$$



 

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.