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.}

261
SXUS43 KGRB 300952
RECGRB
WIZ048-WIZ049-302100-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
451 AM CDT Thu Apr 30 2026

...FROST ADVISORY IN EFFECT UNTIL 8 AM CDT THIS MORNING...

.EARLY THIS MORNING...North winds around 5 knots. Patchy frost.
Waves 1 foot or less. Near steady temperature in the mid 30s.
.TODAY...Northwest winds 5 to 10 knots. Areas of frost in the
morning. chance of rain showers through the day. Waves 1 foot or
less. Highs in the upper 40s.
.TONIGHT...North winds 5 to 10 knots. Chance of rain showers in
the evening. areas of frost after midnight. Waves 1 foot or less.
Lows in the mid 30s.
.FRIDAY...North winds 5 to 10 knots. Areas of frost in the
morning. chance of sprinkles in the morning. Waves 1 foot or
less. Highs in the mid 40s.
.FRIDAY NIGHT...Northeast winds around 5 knots. Areas of frost
after midnight. Waves 1 foot or less. Lows in the lower 30s.

$$

Local Observations
^{Note: Check product creation time to verify this is a current product.}

    
                        

739

ASUS43 KGRB 301659

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

1200 PM CDT THU APR 30 2026



WIZ005-009-010>012-018-019-301800-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       MIX PCPN  36  30  79 VRB7      30.04F

MANITOWISH WTR NOT AVBL

ARBOR VITAE    CLOUDY    39  27  62 W7        29.98F

EAGLE RIVER    LGT SNOW  38  29  70 SW6       29.98R

LAND O LAKES   CLOUDY    40  32  73 CALM      29.99F

RHINELANDER    CLOUDY    40  21  46 VRB5      29.98F

PHILLIPS       CLOUDY    39  23  53 N5        30.00S

ANTIGO         NOT AVBL

TOMAHAWK       NOT AVBL

MERRILL        NOT AVBL

$$



WIZ013-073-301800-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  CLOUDY    41  30  65 VRB3      29.98F

MARINETTE      LGT RAIN  40  34  79 SE8       30.03S

$$



WIZ017-030-035>037-045-301800-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        CLOUDY    41  26  54 NW7       29.99F

WAUSAU         NOT AVBL

MOSINEE        CLOUDY    41  25  52 CALM      30.00S

MARSHFIELD     CLOUDY    45  26  47 NW7       29.99F

WISC RAPIDS    CLOUDY    46  24  42 S5        30.00F

STEVENS POINT  NOT AVBL

WAUPACA        NOT AVBL

SHAWANO        CLOUDY    46  28  49 CALM      30.02F

CLINTONVILLE   NOT AVBL

WAUTOMA        CLOUDY    47  29  49 SE6       30.01F

$$



WIZ038-039-048-051-301800-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  CLOUDY    44  30  57 VRB3      30.02S

APPLETON       PTSUNNY   46  30  53 N5        30.03S

OSHKOSH        PTSUNNY   47  32  56 VRB6      30.02S

FOND DU LAC    MOSUNNY   47  28  47 NE10      30.02F

$$



WIZ022-050-052-301800-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        CLOUDY    40  29  64 N3        30.01S

WASHINGTON ISL CLOUDY    40  30  68 W8        30.02S

STURGEON BAY   CLOUDY    42  29  59 N5        30.03F

MANITOWOC      PTSUNNY   42  37  82 E12       30.03S

SHEBOYGAN      MOSUNNY   47  35  63 E7        30.01F

$$



LMZ563-521-522-541>543-301800-

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 1600   38      40/ 14/ 14 1017.2S

KEWAUNEE LKSHORE 1630           90/  5/  7 1016.5S

NORTHPORT PIER   1600          330/  6/  7 1017.6

MENOMINEE LKSHOR 1630   38 50  110/  6/  7 1016.1S

$$

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.