Portland, IN Weather Forecast

Local 7-day forecast

81°

Sunny

Track current conditions, temperature changes, wind, and the full daily outlook for Portland, IN in one place.

Saturday, August 29, 2026

Wind: 0 to 5 mph SE

Saturday

Sunny, with a high near 81.

Local 7-day forecast

Local Weather Overview

This forecast page for Portland, IN is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Aug 26, 2026 5:07 PM EDT.

The active forecast window currently covers Aug 29 to Sep 1, 2026 for Portland, IN.

Page Snapshot

Page focus: city weather
Forecast window: Aug 29 to Sep 1, 2026
Latest sync: Aug 26, 2026 5:07 PM EDT
Forecast office: IWX
Source: NOAA / NWS

Next High

81°F

Saturday

Next Low

62°F

Saturday Night

Rain Outlook

Periods mentioning precipitation

Windiest

5 to 15 mph

Monday

Daily Outlook

Today

Aug 29

Sunny

81 °F

/ 62°F

Wind 0 to 5 mph

Sun

Aug 30

Mostly Sunny

86 °F

/ 68°F

Wind 5 to 10 mph

Mon

Aug 31

Mostly Sunny

89 °F

/ 71°F

Wind 5 to 15 mph

Tue

Sep 1

Mostly Sunny then Slight Chance Showers And Thunderstorms

90 °F

/ 70°F

Wind 5 to 10 mph

This Week in Portland

Tuesday looks like the warmest upcoming period in Portland at 90 degrees F.

Saturday Night is the coolest period ahead with temperatures near 62 degrees F.

The strongest winds are forecast for Monday at about 5 to 15 mph SW.

Precipitation is mentioned in 2 upcoming forecast periods.

Forecast Details

Last updated: Aug 26, 2026 5:07 PM EDT
Coverage: 4 days
Time zone: America/Indiana/Indianapolis
Forecast office: IWX
Radar station: KIWX

Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.

Open NOAA source

Extended Forecast

Saturday Night

Aug 29

62°F

Partly Cloudy

0 to 5 mph S

Partly cloudy, with a low around 62.

Sunday

Aug 30

86°F

Mostly Sunny

5 to 10 mph S

Mostly sunny, with a high near 86.

Sunday Night

Aug 30

68°F

Partly Cloudy

5 to 10 mph SW

Partly cloudy, with a low around 68.

Monday

Aug 31

89°F

Mostly Sunny

5 to 15 mph SW

Mostly sunny, with a high near 89.

Monday Night

Aug 31

71°F

Partly Cloudy

5 to 10 mph SW

Partly cloudy, with a low around 71.

Tuesday

Sep 1

90°F

Mostly Sunny then Slight Chance Showers And Thunderstorms

5 to 10 mph SW

A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90.

Tuesday Night

Sep 1

70°F

Slight Chance Showers And Thunderstorms then Partly Cloudy

0 to 10 mph SW

A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
Saturday Aug 29	Sunny	81°F	0 to 5 mph SE	Sunny, with a high near 81.
Saturday Night Aug 29	Partly Cloudy	62°F	0 to 5 mph S	Partly cloudy, with a low around 62.
Sunday Aug 30	Mostly Sunny	86°F	5 to 10 mph S	Mostly sunny, with a high near 86.
Sunday Night Aug 30	Partly Cloudy	68°F	5 to 10 mph SW	Partly cloudy, with a low around 68.
Monday Aug 31	Mostly Sunny	89°F	5 to 15 mph SW	Mostly sunny, with a high near 89.
Monday Night Aug 31	Partly Cloudy	71°F	5 to 10 mph SW	Partly cloudy, with a low around 71.
Tuesday Sep 1	Mostly Sunny then Slight Chance Showers And Thunderstorms	90°F	5 to 10 mph SW	A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90.
Tuesday Night Sep 1	Slight Chance Showers And Thunderstorms then Partly Cloudy	70°F	0 to 10 mph SW	A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70.

Nearby Forecasts

Explore weather pages for nearby cities and major places around Portland.

Region Links

Jay County weather

County forecast page

Indiana weather

Statewide weather overview

United States weather

National weather entry point

Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.