UTC Offset
UTC-07:00
Costa Mesa, United States Snapshot 2026
Where is Costa Mesa?
Costa Mesa, United States
- Continent
- Americas
- Country
- United States
- City
- Costa Mesa
- Population
- 113.2K
- Elevation
- 30 m
- Coordinates
- 33.64°, -117.92°
Costa Mesa is a city in United States with a population of approximately 113.2K. Average temperatures range from 9°C (47°F) in January to 28°C (82°F) in August. The best time to visit is June, July, August, September, October.
Time in Costa Mesa right now
Open full time & time zone page 11:21 21
Monday, June 15, 2026
IANA time zone
America/Los_Angeles
Daylight saving
DST in effect
PST / PDT
Next DST change
November 1
backward -1h
Live weather in Costa Mesa
Daylight in Costa Mesa today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 22m
Climate normals for Costa Mesa
Long-term monthly averages based on historical data.
January
Good 
February
Good March
Good April
Excellent May
Excellent June best
Excellent July best
Excellent August best
Excellent September best
Excellent October best
Excellent November
Excellent December
Good | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 18°C / 9°C | 16°C / 7°C | 6days (73 mm) Good | 8.2h Good | 76% Humid | 3.8 Moderate | Good | View Details |
| February | 18°C / 9°C | 17°C / 7°C | 5days (61 mm) Good | 9h Good | 72% Muggy | 4.5 Moderate | Good | View Details |
| March | 19°C / 10°C | 18°C / 9°C | 8days (59 mm) Wet | 10.1h Excellent | 76% Humid | 6.2 High | Good | View Details |
| April | 21°C / 12°C | 20°C / 11°C | 2days (16 mm) Excellent | 11.4h Excellent | 72% Muggy | 7.4 Very High | Excellent | View Details |
| May | 21°C / 14°C | 21°C / 13°C | 2days (7 mm) Excellent | 11.9h Excellent | 74% Muggy | 7.8 Very High | Excellent | View Details |
| June best | 24°C / 16°C | 25°C / 16°C | 1days (2 mm) Excellent | 13h Excellent | 72% Muggy | 8.3 Very High | Excellent | View Details |
| July best | 27°C / 18°C | 29°C / 19°C | 0days (1 mm) Excellent | 13.2h Excellent | 71% Muggy | 8.5 Very High | Excellent | View Details |
| August best | 28°C / 19°C | 30°C / 21°C | 0days (6 mm) Excellent | 12.1h Excellent | 73% Muggy | 8 Very High | Excellent | View Details |
| September best | 27°C / 18°C | 28°C / 20°C | 1days (5 mm) Excellent | 11.2h Excellent | 74% Muggy | 7 High | Excellent | View Details |
| October best | 25°C / 16°C | 25°C / 16°C | 2days (9 mm) Excellent | 10.1h Excellent | 71% Muggy | 5.6 High | Excellent | View Details |
| November | 22°C / 12°C | 21°C / 11°C | 3days (27 mm) Excellent | 9h Good | 70% Muggy | 4.2 Moderate | Excellent | View Details |
| December | 19°C / 9°C | 17°C / 8°C | 5days (57 mm) Good | 7.9h Good | 74% Muggy | 3.4 Moderate | Good | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 18°C / 9°C . Feb: 18°C / 9°C . Mar: 19°C / 10°C . Apr: 21°C / 12°C . May: 21°C / 14°C . Jun: 24°C / 16°C . Jul: 27°C / 18°C . Aug: 28°C / 19°C . Sep: 27°C / 18°C . Oct: 25°C / 16°C . Nov: 22°C / 12°C . Dec: 19°C / 9°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 73 mm. Feb: 61 mm. Mar: 59 mm. Apr: 16 mm. May: 7 mm. Jun: 2 mm. Jul: 1 mm. Aug: 6 mm. Sep: 5 mm. Oct: 9 mm. Nov: 27 mm. Dec: 57 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 72%. Mar: 76%. Apr: 72%. May: 74%. Jun: 72%. Jul: 71%. Aug: 73%. Sep: 74%. Oct: 71%. Nov: 70%. Dec: 74%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 13 km/h . Feb: 16 km/h . Mar: 18 km/h . Apr: 18 km/h . May: 17 km/h . Jun: 16 km/h . Jul: 16 km/h . Aug: 16 km/h . Sep: 16 km/h . Oct: 15 km/h . Nov: 14 km/h . Dec: 13 km/h .
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 15°C . Feb: 15°C . Mar: 15°C . Apr: 15°C . May: 17°C . Jun: 19°C . Jul: 21°C . Aug: 22°C . Sep: 21°C . Oct: 19°C . Nov: 17°C . Dec: 16°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 4. Feb: UV 5. Mar: UV 6. Apr: UV 7. May: UV 8. Jun: UV 8. Jul: UV 9. Aug: UV 8. Sep: UV 7. Oct: UV 6. Nov: UV 4. Dec: UV 3.
Frequently Asked Questions
Costa Mesa has a population of approximately 113.2K.
The best months to visit Costa Mesa are June, July, August, September, October, when temperatures are pleasant and rainfall is lower.
Costa Mesa receives approximately 323mm of rainfall annually across 35 rainy days.
Costa Mesa is located in United States, in the Americas region.
Costa Mesa sits at an elevation of 30 m (98 ft) above sea level.