Grand Lake, AR Weather Forecast
Local 7-day forecast
Partly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Grand Lake, AR in one place.
Partly cloudy, with a low around 74. South wind around 0 mph.
Local Weather Overview
This forecast page for Grand Lake, AR 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: Sep 15, 2026 3:24 AM CDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Grand Lake, AR.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 3:24 AM CDT
- Forecast office
- JAN
- Source
- NOAA / NWS
Daily Outlook
This Week in Grand Lake
Tuesday looks like the warmest upcoming period in Grand Lake at 99 degrees F.
Thursday Night is the coolest period ahead with temperatures near 70 degrees F.
The strongest winds are forecast for Tuesday at about 0 to 5 mph S.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 3:24 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- JAN
- Radar station
- KDGX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Sunny, with a high near 99. Heat index values as high as 108. South wind 0 to 5 mph.
Mostly clear, with a low around 75. Heat index values as high as 104. Southeast wind 0 to 5 mph.
Sunny, with a high near 98. Heat index values as high as 104. Southeast wind 0 to 5 mph.
Mostly clear, with a low around 72. Southeast wind 0 to 5 mph.
Sunny, with a high near 98. East southeast wind 0 to 5 mph.
Mostly clear, with a low around 70. East southeast wind 0 to 5 mph.
Sunny, with a high near 98. East wind 0 to 5 mph.
Mostly clear, with a low around 71. Southeast wind 0 to 5 mph.
Sunny, with a high near 97.
Partly cloudy, with a low around 72.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 72. Chance of precipitation is 20%.
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Sep 15
|
Partly Cloudy
|
74°F |
0 mph
|
|
Tuesday
Sep 15
|
Sunny
|
99°F |
0 to 5 mph
S
|
|
Tuesday Night
Sep 15
|
Mostly Clear
|
75°F |
0 to 5 mph
SE
|
|
Wednesday
Sep 16
|
Sunny
|
98°F |
0 to 5 mph
SE
|
|
Wednesday Night
Sep 16
|
Mostly Clear
|
72°F |
0 to 5 mph
SE
|
|
Thursday
Sep 17
|
Sunny
|
98°F |
0 to 5 mph
ESE
|
|
Thursday Night
Sep 17
|
Mostly Clear
|
70°F |
0 to 5 mph
ESE
|
|
Friday
Sep 18
|
Sunny
|
98°F |
0 to 5 mph
E
|
|
Friday Night
Sep 18
|
Mostly Clear
|
71°F |
0 to 5 mph
SE
|
|
Saturday
Sep 19
|
Sunny
|
97°F |
0 to 5 mph
SE
|
|
Saturday Night
Sep 19
|
Partly Cloudy
|
72°F |
0 to 5 mph
SSE
|
|
Sunday
Sep 20
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
95°F |
0 to 5 mph
SE
|
|
Sunday Night
Sep 20
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
72°F |
0 to 5 mph
SSE
|
|
Monday
Sep 21
|
Chance Showers And Thunderstorms
|
93°F |
0 to 5 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grand Lake.