Marine Weather and Tide Forecast for Green Bay, WI
 | Sunrise 6:55 AM Sunset 5:16 PM Moonrise 5:10 AM Moonset 1:08 PM |
Marine Forecasts
NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
LMZ522 Expires:202601310500;;822042 Fzus53 Kgrb 310038 Nshgrb
nearshore marine forecast national weather service green bay wi 638 pm cst Fri jan 30 2026
for waters within five nautical miles of shore on lake michigan
lmz521-522-310500- green bay south of line from cedar river to rock island passage and north of a line from oconto wi to little sturgeon bay wi- green bay south of line from oconto wi to little sturgeon bay wi- 638 pm cst Fri jan 30 2026
Tonight - N wind 10 to 20 kts. Waves 2 ft or less. A chance of flurries in the evening.
Saturday - N wind 10 to 15 kts backing nw around 5 kts early in the afternoon. Waves 2 ft or less. Partly cloudy in the morning then clearing.
Saturday night - SW wind 5 to 10 kts. Waves 2 ft or less. Mostly clear.
Sunday - SW wind 10 to 15 kts. Waves 2 ft or less. Partly cloudy.
nearshore marine forecast national weather service green bay wi 638 pm cst Fri jan 30 2026
for waters within five nautical miles of shore on lake michigan
lmz521-522-310500- green bay south of line from cedar river to rock island passage and north of a line from oconto wi to little sturgeon bay wi- green bay south of line from oconto wi to little sturgeon bay wi- 638 pm cst Fri jan 30 2026
LMZ500
No data
No data
7 Day Forecast for Marine Location Near Green Bay, WI
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FXUS63 KGRB 120445 AFDGRB
Area Forecast Discussion National Weather Service Green Bay WI 1045 PM CST Wed Feb 11 2026
Updated aviation portion for 06Z TAF issuance
KEY MESSAGES
- A pattern change bringing above normal temperatures is expected beginning Thursday and continuing into next week. Temperatures will likely (40-80% chance) hit 40 degrees by Friday and could hit 50 degrees (30-50% chance) south of highway 29 on Tuesday.
DISCUSSION
Issued at 102 PM CST Wed Feb 11 2026
Ridging over the upper-Midwest will bring low impact weather to the region through this weekend. Most noteworthy impact is a 15-20% chance for fog to develop across northern WI tonight, however, with drier air arriving with the high pressure any fog that does develop should remain patchy. Additional periods of fog will be possible this weekend as warmer air moves over the melting snowpack.
Otherwise, chances for precip this weekend have trended downward over the last 24 hours with ensembles coming into better agreement in a more southerly track for a low across the southern CONUS.
Expect a more active pattern to develop early next week as troughing moves over the central CONUS. Ensemble and deterministic guidance are in generally agreement that a seasonally warm moist (PWATS up to 0.8") air mass will move over the region. This may lead to a more impactful precipitation event Tuesday into Wednesday. However, there is still a large degree of uncertainty with vertical temperature profiles. This makes determining a dominate p-type difficult for this period.
Temperatures will begin to trend warmer than normal Thursday with a 50-80% chance of highs above 40 degrees as soon as Friday and a 50- 90% chance by Sunday. There is a 30-50% chance that areas south of HWY 29 reach 50 degrees by early next week. The warming trend will lead to a quickly melting snowpack and deteriorating ice conditions, which does raise the concern for ice jams next week.
AVIATION
for 06Z TAF Issuance Issued at 1039 PM CST Wed Feb 11 2026
Stratocumulus clouds (MVFR) may brush through far northeast WI overnight, as mid/high level clouds get close to central WI.
Otherwise, clear skies and light and variable winds are expected, along with patchy fog over north central WI into early Thursday morning.
Have kept a TEMPO group for MVFR/IFR fog at RHI between 09z-13z, but left any mention of fog out of the remaining TAF sites. Aside from SCT-BKN mid/high clouds (mainly over the southwest part of the forecast area), there is potential for scattered stratocumulus clouds in the afternoon/evening. Light and variable winds will become southerly Thursday afternoon/evening.
GRB WATCHES/WARNINGS/ADVISORIES
None.
Area Forecast Discussion National Weather Service Green Bay WI 1045 PM CST Wed Feb 11 2026
Updated aviation portion for 06Z TAF issuance
KEY MESSAGES
- A pattern change bringing above normal temperatures is expected beginning Thursday and continuing into next week. Temperatures will likely (40-80% chance) hit 40 degrees by Friday and could hit 50 degrees (30-50% chance) south of highway 29 on Tuesday.
DISCUSSION
Issued at 102 PM CST Wed Feb 11 2026
Ridging over the upper-Midwest will bring low impact weather to the region through this weekend. Most noteworthy impact is a 15-20% chance for fog to develop across northern WI tonight, however, with drier air arriving with the high pressure any fog that does develop should remain patchy. Additional periods of fog will be possible this weekend as warmer air moves over the melting snowpack.
Otherwise, chances for precip this weekend have trended downward over the last 24 hours with ensembles coming into better agreement in a more southerly track for a low across the southern CONUS.
Expect a more active pattern to develop early next week as troughing moves over the central CONUS. Ensemble and deterministic guidance are in generally agreement that a seasonally warm moist (PWATS up to 0.8") air mass will move over the region. This may lead to a more impactful precipitation event Tuesday into Wednesday. However, there is still a large degree of uncertainty with vertical temperature profiles. This makes determining a dominate p-type difficult for this period.
Temperatures will begin to trend warmer than normal Thursday with a 50-80% chance of highs above 40 degrees as soon as Friday and a 50- 90% chance by Sunday. There is a 30-50% chance that areas south of HWY 29 reach 50 degrees by early next week. The warming trend will lead to a quickly melting snowpack and deteriorating ice conditions, which does raise the concern for ice jams next week.
AVIATION
for 06Z TAF Issuance Issued at 1039 PM CST Wed Feb 11 2026
Stratocumulus clouds (MVFR) may brush through far northeast WI overnight, as mid/high level clouds get close to central WI.
Otherwise, clear skies and light and variable winds are expected, along with patchy fog over north central WI into early Thursday morning.
Have kept a TEMPO group for MVFR/IFR fog at RHI between 09z-13z, but left any mention of fog out of the remaining TAF sites. Aside from SCT-BKN mid/high clouds (mainly over the southwest part of the forecast area), there is potential for scattered stratocumulus clouds in the afternoon/evening. Light and variable winds will become southerly Thursday afternoon/evening.
GRB WATCHES/WARNINGS/ADVISORIES
None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| GBWW3 | 2 mi | 54 min | 0G | 18°F | 30.30 | |||
| KWNW3 - 9087069- Kewaunee, WI | 26 mi | 54 min | NNW 5.1G | 21°F | 30.27 | |||
| MN4 - 9087088 - Menominee, MI | 45 mi | 54 min | WNW 4.1G | 18°F | 35°F | 30.27 | 13°F |
Wind History for Kewaunee MET, WI
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Link to 1 hour of 5 minute data for KGRB
Terminal Aerodrome Forecast (TAF) for KGRB
Wind History Graph: GRB
(wind in knots)
GEOS Local Image of great lakes
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Green Bay, WI,
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