Costa Mesa, CA Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Costa Mesa, CA in one place.
Mostly cloudy, with a high near 67. West wind 5 to 15 mph, with gusts as high as 25 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: May 24, 2026 12:27 AM PDT.
The active forecast window currently covers May 25 to May 30, 2026 for Costa Mesa, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 25 to May 30, 2026
- Latest sync
- May 24, 2026 12:27 AM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Costa Mesa
Saturday looks like the warmest upcoming period in Costa Mesa at 70 degrees F.
Monday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Memorial Day at about 5 to 15 mph W.
The forecast from May 25 through May 30 stays mostly dry.
Forecast Details
- Last updated
- May 24, 2026 12:27 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
Mostly cloudy, with a low around 58. West wind 5 to 15 mph, with gusts as high as 25 mph.
Partly sunny, with a high near 66.
Mostly cloudy, with a low around 58.
Partly sunny, with a high near 66.
Mostly cloudy, with a low around 58.
Mostly sunny, with a high near 67.
Partly cloudy, with a low around 58.
Mostly sunny, with a high near 68.
Mostly clear, with a low around 59.
Sunny, with a high near 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Memorial Day
May 25
|
Mostly Cloudy
|
67°F |
5 to 15 mph
W
|
|
Monday Night
May 25
|
Mostly Cloudy
|
58°F |
5 to 15 mph
W
|
|
Tuesday
May 26
|
Partly Sunny
|
66°F |
5 to 10 mph
SW
|
|
Tuesday Night
May 26
|
Mostly Cloudy
|
58°F |
10 mph
SW
|
|
Wednesday
May 27
|
Partly Sunny
|
66°F |
10 mph
S
|
|
Wednesday Night
May 27
|
Mostly Cloudy
|
58°F |
5 to 10 mph
S
|
|
Thursday
May 28
|
Mostly Sunny
|
67°F |
5 to 10 mph
SW
|
|
Thursday Night
May 28
|
Partly Cloudy
|
58°F |
5 to 10 mph
SW
|
|
Friday
May 29
|
Mostly Sunny
|
68°F |
5 to 15 mph
W
|
|
Friday Night
May 29
|
Mostly Clear
|
59°F |
5 to 15 mph
SW
|
|
Saturday
May 30
|
Sunny
|
70°F |
5 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Costa Mesa.
