Weather in Costa Mesa in August
Costa Mesa, United States averages a high of 26°C (78.8°F) and low of 18.1°C (64.6°F) in August, with 0 rain days and 12.6 hours of daily sunshine. Travel score: 94.4/100 (Excellent). The best time to visit Costa Mesa is July.
High
26°C79°F
Low
18°C65°F
🌧️
0
rain days
☀️
12.6
hrs/day sunshine
💧
75%
humidity
94— Excellent
August in Costa Mesa is warm and dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in Costa Mesa?
How much does it rain in Costa Mesa in August?
Costa Mesa receives an average of 3.2mm of rainfall across 0 rainy days in August. The annual total is 310.6mm.
What should I pack for Costa Mesa in August?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 26°C
🧴
Sunscreen SPF 30+
13 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Traveling to United States in August?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31