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Portage, Michigan 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Portage MI
National Weather Service Forecast for: Portage MI
Issued by: National Weather Service Grand Rapids, MI
Updated: 11:03 am EDT Jul 7, 2025
 
Today

Today: Partly sunny, with a high near 81. North northeast wind around 7 mph.
Partly Sunny

Tonight

Tonight: Mostly clear, with a low around 59. North wind 5 to 7 mph becoming calm  in the evening.
Mostly Clear

Tuesday

Tuesday: Mostly sunny, with a high near 84. Calm wind becoming west southwest around 5 mph in the afternoon.
Mostly Sunny

Tuesday
Night
Tuesday Night: A 20 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 64. Light and variable wind.
Slight Chance
T-storms

Wednesday

Wednesday: A 30 percent chance of showers and thunderstorms.  Partly sunny, with a high near 83. Calm wind becoming southwest around 6 mph in the afternoon.
Chance
Showers then
Chance
T-storms
Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 61.
Partly Cloudy

Thursday

Thursday: Mostly sunny, with a high near 85.
Mostly Sunny

Thursday
Night
Thursday Night: Mostly clear, with a low around 64.
Mostly Clear

Friday

Friday: A chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 87.
Mostly Sunny
then Chance
T-storms
Hi 81 °F Lo 59 °F Hi 84 °F Lo 64 °F Hi 83 °F Lo 61 °F Hi 85 °F Lo 64 °F Hi 87 °F

Hazardous Weather Outlook
 

Today
 
Partly sunny, with a high near 81. North northeast wind around 7 mph.
Tonight
 
Mostly clear, with a low around 59. North wind 5 to 7 mph becoming calm in the evening.
Tuesday
 
Mostly sunny, with a high near 84. Calm wind becoming west southwest around 5 mph in the afternoon.
Tuesday Night
 
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Light and variable wind.
Wednesday
 
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
 
Partly cloudy, with a low around 61.
Thursday
 
Mostly sunny, with a high near 85.
Thursday Night
 
Mostly clear, with a low around 64.
Friday
 
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87.
Friday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Saturday
 
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 84.
Saturday Night
 
Showers and thunderstorms likely. Mostly cloudy, with a low around 64.
Sunday
 
Partly sunny, with a high near 83.

 

Forecast from NOAA-NWS for Portage MI.

Weather Forecast Discussion
844
FXUS63 KGRR 071145
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
745 AM EDT Mon Jul 7 2025

.KEY MESSAGES...

- Clearing out with less heat and humidity today

- Almost daily chances for showers or storms Tuesday night into
  the weekend

&&

.DISCUSSION...
Issued at 408 AM EDT Mon Jul 7 2025

- Clearing out with less heat and humidity today

Early morning low stratus and drizzly rain showers will gradually
lift and clear out from northwest to southeast during the day.
High temperatures will be closer to seasonal normals today, in the
lower 80s in most spots, with lower dew points in the upper 50s
to mid 60s. More information on the potential late-day increasing
swim risk (beach hazards) in the Marine section below.

- Almost daily chances for showers or storms Tuesday night into
  the weekend

Quasi-zonal but relatively weak 500 mb flow with a few shortwaves
rippling through, plus gradually increasing heat and moisture in
the the low levels, will support frequent chances for showers or
thunderstorms popping up between Tuesday night and the weekend.
Per ensembles, chances are relatively higher between Tuesday night
and Wednesday afternoon, then Friday night through Saturday
evening in association with the more pronounced upper-level
shortwave troughs.

&&

.AVIATION /12Z TAFS THROUGH 12Z TUESDAY/...
Issued at 745 AM EDT Mon Jul 7 2025

Feels more like autumn out there this morning, with variable IFR
to MVFR ceilings and visibility plus some areas of drizzle.
Conditions should gradually improve as cloud bases lift and
scatter. Not very good confidence in getting the change in flight
categories down to the exact hour as models handle the mixing and
drying of the lower atmosphere quite differently. But solar
heating doesn`t get much stronger during the year than now, so
there is optimism for VFR by afternoon. Generally, the trend to
VFR will occur sooner northwest and later southeast. Winds will
mostly be from the north, becoming more variable this evening and
overnight.

&&

.MARINE...
Issued at 408 AM EDT Mon Jul 7 2025

Waves in the nearshore are coming down following yesterday`s
evening increase in winds and waves. Winds from the north becoming
northwest and increasing this afternoon will trend conditions
toward a late-day moderate to high swim risk (beach hazard)
for Muskegon county and south. Combination of post-cold-frontal
high pressure nudging into the U.P. and the afternoon development
of the lake breeze circulation will intensify winds toward 18-20
knots in the nearshore off Muskegon, Grand Haven, and Holland, per
the HREF mean. This is a scenario that often yields a moderate
becoming high swim risk late in the day for Muskegon State Park,
Holland State Park, and South Haven North Beach.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...Beach Hazards Statement from 4 PM EDT this afternoon through
     this evening for MIZ050-056-064-071.
MARINE...Small Craft Advisory from 4 PM this afternoon to 10 PM EDT this
     evening for LMZ844>847.

&&

$$

DISCUSSION...CAS
AVIATION...CAS
MARINE...CAS
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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