Fountain Valley, CA Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Fountain Valley, CA in one place.
Mostly sunny, with a high near 77. South wind 5 to 10 mph.
Local Weather Overview
This forecast page for Fountain Valley, 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: Jul 17, 2026 3:08 PM PDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for Fountain Valley, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 3:08 PM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Fountain Valley
Thursday looks like the warmest upcoming period in Fountain Valley at 80 degrees F.
Saturday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Saturday at about 5 to 10 mph S.
The forecast from Jul 18 through Jul 23 stays mostly dry.
Forecast Details
- Last updated
- Jul 17, 2026 3:08 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
Mostly cloudy, with a low around 68. South wind 0 to 10 mph.
Mostly sunny, with a high near 77. Southwest wind 0 to 10 mph.
Partly cloudy, with a low around 68.
Mostly sunny, with a high near 78.
Partly cloudy, with a low around 69.
Sunny, with a high near 78.
Mostly clear, with a low around 69.
Sunny, with a high near 79.
Mostly clear, with a low around 70.
Mostly sunny, with a high near 80.
Partly cloudy, with a low around 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Mostly Sunny
|
77°F |
5 to 10 mph
S
|
|
Saturday Night
Jul 18
|
Mostly Cloudy
|
68°F |
0 to 10 mph
S
|
|
Sunday
Jul 19
|
Mostly Sunny
|
77°F |
0 to 10 mph
SW
|
|
Sunday Night
Jul 19
|
Partly Cloudy
|
68°F |
0 to 10 mph
SW
|
|
Monday
Jul 20
|
Mostly Sunny
|
78°F |
0 to 10 mph
SW
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
69°F |
0 to 10 mph
SW
|
|
Tuesday
Jul 21
|
Sunny
|
78°F |
0 to 10 mph
SW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
69°F |
5 to 10 mph
SW
|
|
Wednesday
Jul 22
|
Sunny
|
79°F |
5 to 10 mph
SW
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
70°F |
0 to 10 mph
S
|
|
Thursday
Jul 23
|
Mostly Sunny
|
80°F |
0 to 10 mph
SW
|
|
Thursday Night
Jul 23
|
Partly Cloudy
|
70°F |
0 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fountain Valley.
