Costa Mesa, CA Weather Forecast
Local 7-day forecast
Patchy Fog
Track current conditions, temperature changes, wind, and the full daily outlook for Costa Mesa, CA in one place.
Patchy fog after 5am. Mostly clear, with a low around 70. Northwest wind around 5 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: Oct 8, 2026 6:42 AM PDT.
The active forecast window currently covers Oct 8 to Oct 14, 2026 for Costa Mesa, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 8 to Oct 14, 2026
- Latest sync
- Oct 8, 2026 6:42 AM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Costa Mesa
Thursday looks like the warmest upcoming period in Costa Mesa at 83 degrees F.
Monday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Sunday Night at about 10 to 20 mph SW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 8, 2026 6:42 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 before 8am. Sunny, with a high near 83. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Patchy fog after 2am. Mostly clear, with a low around 69. Northwest wind 0 to 10 mph, with gusts as high as 20 mph.
Patchy fog before 11am. Mostly sunny, with a high near 79. Northwest wind 0 to 10 mph.
Mostly cloudy, with a low around 68. West wind 5 to 10 mph.
Mostly cloudy, with a high near 75.
A chance of rain showers after 11pm. Mostly cloudy, with a low around 68.
A chance of rain showers. Mostly cloudy, with a high near 71.
Rain showers likely. Mostly cloudy, with a low around 63.
A chance of rain showers. Partly sunny, with a high near 69.
A chance of rain showers. Mostly cloudy, with a low around 60.
A chance of rain showers. Partly sunny, with a high near 70.
A chance of rain showers before 5am. Partly cloudy, with a low around 62.
Sunny, with a high near 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Oct 8
|
Patchy Fog
|
70°F |
5 mph
NW
|
|
Thursday
Oct 8
|
Patchy Fog then Sunny
|
83°F |
5 to 10 mph
NW
|
|
Thursday Night
Oct 8
|
Mostly Clear then Patchy Fog
|
69°F |
0 to 10 mph
NW
|
|
Friday
Oct 9
|
Patchy Fog then Mostly Sunny
|
79°F |
0 to 10 mph
NW
|
|
Friday Night
Oct 9
|
Mostly Cloudy
|
68°F |
5 to 10 mph
W
|
|
Saturday
Oct 10
|
Mostly Cloudy
|
75°F |
5 to 10 mph
S
|
|
Saturday Night
Oct 10
|
Chance Rain Showers
|
68°F |
10 mph
NW
|
|
Sunday
Oct 11
|
Chance Rain Showers
|
71°F |
10 to 15 mph
NW
|
|
Sunday Night
Oct 11
|
Rain Showers Likely
|
63°F |
10 to 20 mph
SW
|
|
Columbus Day
Oct 12
|
Chance Rain Showers
|
69°F |
10 mph
SW
|
|
Monday Night
Oct 12
|
Chance Rain Showers
|
60°F |
5 to 10 mph
NW
|
|
Tuesday
Oct 13
|
Chance Rain Showers
|
70°F |
5 to 10 mph
NW
|
|
Tuesday Night
Oct 13
|
Chance Rain Showers
|
62°F |
5 to 10 mph
NW
|
|
Wednesday
Oct 14
|
Sunny
|
72°F |
5 to 10 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Costa Mesa.
