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 75. Southwest wind 5 to 10 mph, with gusts as high as 20 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: Apr 16, 2026 10:57 AM PDT.
The active forecast window currently covers Apr 18 to Apr 22, 2026 for Fountain Valley, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 10:57 AM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Fountain Valley
Saturday looks like the warmest upcoming period in Fountain Valley at 75 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 53 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 15 mph W.
The forecast from Apr 18 through Apr 22 stays mostly dry.
Forecast Details
- Last updated
- Apr 16, 2026 10:57 AM PDT
- Coverage
- 6 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
Patchy fog between 11pm and 5am. Mostly cloudy, with a low around 55.
Mostly sunny, with a high near 74.
Mostly clear, with a low around 55.
Sunny, with a high near 70.
Partly cloudy, with a low around 55.
Mostly sunny, with a high near 69.
Partly cloudy, with a low around 53.
Mostly sunny, with a high near 69.
Partly cloudy, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 18
|
Mostly Sunny
|
75°F |
5 to 10 mph
SW
|
|
Saturday Night
Apr 18
|
Patchy Fog
|
55°F |
0 to 10 mph
SW
|
|
Sunday
Apr 19
|
Mostly Sunny
|
74°F |
0 to 10 mph
SW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
55°F |
0 to 10 mph
W
|
|
Monday
Apr 20
|
Sunny
|
70°F |
0 to 10 mph
SW
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
55°F |
5 to 10 mph
W
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
69°F |
5 to 15 mph
W
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
53°F |
5 to 10 mph
W
|
|
Wednesday
Apr 22
|
Mostly Sunny
|
69°F |
5 to 10 mph
W
|
|
Wednesday Night
Apr 22
|
Partly Cloudy
|
54°F |
5 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fountain Valley.
