Lake Forest, CA Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Lake Forest, CA in one place.
Mostly sunny, with a high near 78. Southwest wind 0 to 5 mph.
Local Weather Overview
This forecast page for Lake Forest, CA 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 16, 2026 10:44 PM PDT.
The active forecast window currently covers Sep 17 to Sep 23, 2026 for Lake Forest, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 23, 2026
- Latest sync
- Sep 16, 2026 10:44 PM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Lake Forest
Wednesday looks like the warmest upcoming period in Lake Forest at 83 degrees F.
Thursday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Friday at about 0 to 10 mph W.
The forecast from Sep 17 through Sep 23 stays mostly dry.
Forecast Details
- Last updated
- Sep 16, 2026 10:44 PM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- SGX
- Radar station
- KSOX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 61. West wind 0 to 5 mph.
Sunny, with a high near 79. West wind 0 to 10 mph.
Mostly clear, with a low around 63. South wind 0 to 5 mph.
Sunny, with a high near 82.
Partly cloudy, with a low around 64.
Mostly sunny, with a high near 81.
Partly cloudy, with a low around 63.
Mostly sunny, with a high near 80.
Partly cloudy, with a low around 63.
Sunny, with a high near 81.
Mostly clear, with a low around 64.
Sunny, with a high near 83.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Mostly Sunny
|
78°F |
0 to 5 mph
SW
|
|
Thursday Night
Sep 17
|
Partly Cloudy
|
61°F |
0 to 5 mph
W
|
|
Friday
Sep 18
|
Sunny
|
79°F |
0 to 10 mph
W
|
|
Friday Night
Sep 18
|
Mostly Clear
|
63°F |
0 to 5 mph
S
|
|
Saturday
Sep 19
|
Sunny
|
82°F |
0 to 5 mph
SW
|
|
Saturday Night
Sep 19
|
Partly Cloudy
|
64°F |
0 to 5 mph
S
|
|
Sunday
Sep 20
|
Mostly Sunny
|
81°F |
0 to 5 mph
S
|
|
Sunday Night
Sep 20
|
Partly Cloudy
|
63°F |
0 to 5 mph
S
|
|
Monday
Sep 21
|
Mostly Sunny
|
80°F |
0 to 5 mph
S
|
|
Monday Night
Sep 21
|
Partly Cloudy
|
63°F |
0 to 5 mph
S
|
|
Tuesday
Sep 22
|
Sunny
|
81°F |
0 to 5 mph
SW
|
|
Tuesday Night
Sep 22
|
Mostly Clear
|
64°F |
0 to 5 mph
S
|
|
Wednesday
Sep 23
|
Sunny
|
83°F |
0 to 5 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lake Forest.
