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.}

721
SXUS43 KGRB 180721
RECGRB
WIZ048-WIZ049-180900-

Recreational Forecast for Lake Winnebago
National Weather Service Green Bay WI
221 AM CDT Sat Apr 18 2026

.REST OF THE NIGHT...Northwest winds 15 to 20 knots. Chance of
rain showers. Waves less than 1 foot. Lows in the upper 30s.
.SATURDAY...West winds 15 to 20 knots. Chance of sprinkles in the
morning. Slight chance of snow showers through the day. Slight
chance of rain showers in the afternoon. Waves less than 1 foot.
Highs in the mid 40s.
.SATURDAY NIGHT...West winds 10 to 20 knots. Slight chance of
rain showers and snow showers in the evening. Waves less than
1 foot. Lows in the lower 30s.
.SUNDAY...Northwest winds 10 to 15 knots. Chance of flurries in
the morning. Chance of sprinkles through the day. Waves less than
1 foot. Highs in the lower 40s.

$$

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

    
                        

402

ASUS43 KGRB 180710

RWRGRB



NORTH-CENTRAL AND NORTHEAST WISCONSIN REGIONAL WEATHER ROUNDUP

NATIONAL WEATHER SERVICE GREEN BAY WI

200 AM CDT SAT APR 18 2026



WIZ005-009-010>012-018-019-180800-

NORTH CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRONWOOD       CLOUDY    31  26  82 W16       29.64S

MANITOWISH WTR CLOUDY    32  27  82 W13G20    29.60F

ARBOR VITAE    CLOUDY    33  29  85 NW13G20   29.60S

EAGLE RIVER    CLOUDY    34  32  95 W17G23    29.58S

LAND O LAKES   CLOUDY    33  33 100 NW9G16    29.59S

RHINELANDER    CLOUDY    34  30  85 NW9G22    29.59R

PHILLIPS       MOCLDY    32  26  78 NW6       29.65R

ANTIGO         CLOUDY    38  36  93 W17G23    29.57S

TOMAHAWK       MOCLDY    34  29  80 MISG      29.62R

MERRILL        NOT AVBL

$$



WIZ013-073-180800-

NORTHEAST WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

IRON MOUNTAIN  CLOUDY    41  39  93 NW16G25   29.50S

MARINETTE      LGT RAIN  57  56  96 NW12G26   29.47R

OCONTO         CLOUDY    53  53  99 W17G25    29.49R

$$



WIZ017-030-035>037-045-180800-

CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

MEDFORD        CLOUDY    37  30  78 NW8G18    29.64S

WAUSAU         CLOUDY    39  33  79 W16G26    29.61S

MOSINEE        CLOUDY    39  32  75 NW17G23   29.61F

MARSHFIELD     CLOUDY    38  32  79 NW16G28   29.64R

WISC RAPIDS    CLOUDY    40  33  76 NW18G26   29.65R

STEVENS POINT  CLOUDY    42  33  72 NW10G17   29.62S

WAUPACA        CLOUDY    46  37  73 W15G25    29.62S

SHAWANO          N/A     48  42  80 W16G24    29.56R

CLINTONVILLE   CLOUDY    45  41  86 NW13      29.58S

WAUTOMA        CLOUDY    42  36  79 W18       29.63R

$$



WIZ038-039-048-051-180800-

FOX VALLEY



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

NWS GREEN BAY  CLOUDY    49  45  86 W18G29    29.53R

APPLETON       CLOUDY    46  43  87 W22       29.57R

OSHKOSH        CLOUDY    46  40  79 W22G32    29.56S

FOND DU LAC    LGT RAIN  46  43  89 W17G26    29.59S

$$



WIZ022-050-052-180800-

EAST CENTRAL WISCONSIN



CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS

EPHRAIM        LGT RAIN  56  55  97 S6        29.45S

WASHINGTON ISL HVY RAIN  50  48  94 S7        29.45F

STURGEON BAY   LGT RAIN  57  55  93 W21G28    29.49R

MANITOWOC      CLOUDY    53  51  93 W18G28    29.53R

SHEBOYGAN      CLOUDY    50  47  89 NW13G28   29.52F

$$



LMZ563-521-522-541>543-180800-

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 0700   54     280/ 15/ 18  999.9R

KEWAUNEE LKSHORE 0624          210/ 13/ 20  998.3

NORTHPORT PIER   0600          140/  7/ 16  999.0

MENOMINEE LKSHOR 0624   54 43  180/ 10/ 12  996.7

$$

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.