Costa Mesa, CA Weather Forecast
Local 7-day forecast
Patchy Fog then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Costa Mesa, CA in one place.
Patchy fog before 11am. Mostly sunny, with a high near 75. South wind 5 to 10 mph, with gusts as high as 20 mph.
Local Weather Overview
This forecast page for Costa Mesa, 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 8, 2026 8:24 AM PDT.
The active forecast window currently covers Jul 9 to Jul 14, 2026 for Costa Mesa, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 9 to Jul 14, 2026
- Latest sync
- Jul 8, 2026 8:24 AM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Costa Mesa
Tuesday looks like the warmest upcoming period in Costa Mesa at 77 degrees F.
Thursday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Thursday at about 5 to 10 mph S.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 8, 2026 8:24 AM 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
Patchy fog after 11pm. Partly cloudy, with a low around 66. South wind 5 to 10 mph.
Patchy fog before 11am. Mostly sunny, with a high near 74. South wind 5 to 10 mph, with gusts as high as 20 mph.
Mostly cloudy, with a low around 66.
Partly sunny, with a high near 74.
A slight chance of rain showers after 5am. Mostly cloudy, with a low around 67.
A slight chance of rain showers before 11am. Partly sunny, with a high near 74.
A slight chance of rain showers between 11pm and 5am. Partly cloudy, with a low around 68.
Mostly sunny, with a high near 75.
Partly cloudy, with a low around 68.
Mostly sunny, with a high near 77.
Partly cloudy, with a low around 69.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 9
|
Patchy Fog then Mostly Sunny
|
75°F |
5 to 10 mph
S
|
|
Thursday Night
Jul 9
|
Patchy Fog
|
66°F |
5 to 10 mph
S
|
|
Friday
Jul 10
|
Patchy Fog then Mostly Sunny
|
74°F |
5 to 10 mph
S
|
|
Friday Night
Jul 10
|
Mostly Cloudy
|
66°F |
5 to 10 mph
S
|
|
Saturday
Jul 11
|
Partly Sunny
|
74°F |
5 to 10 mph
S
|
|
Saturday Night
Jul 11
|
Mostly Cloudy then Slight Chance Rain Showers
|
67°F |
5 mph
S
|
|
Sunday
Jul 12
|
Slight Chance Rain Showers then Partly Sunny
|
74°F |
0 to 10 mph
SW
|
|
Sunday Night
Jul 12
|
Slight Chance Rain Showers
|
68°F |
0 to 5 mph
SW
|
|
Monday
Jul 13
|
Mostly Sunny
|
75°F |
0 to 10 mph
SW
|
|
Monday Night
Jul 13
|
Partly Cloudy
|
68°F |
5 to 10 mph
W
|
|
Tuesday
Jul 14
|
Mostly Sunny
|
77°F |
5 to 10 mph
W
|
|
Tuesday Night
Jul 14
|
Partly Cloudy
|
69°F |
5 to 10 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Costa Mesa.
