Weather Tomorrow in Costa Mesa, CA
Extreme Heat WatchUntil Aug 23, 5:00 AM
Extreme Heat Watch issued August 22 at 1:10PM PDT until August 28 at 8:00PM PDT by NWS San Diego CA
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Sunday, August 23, 2026
Clear
Precip chance
0%
Wind
0-10 mph
Humidity
78%
Feels like
80–71°F
Data source: National Weather Service (NOAA) · Updated just now
Tomorrow by Hour
69°Temperature trend82°
| Time | Temp | Condition | Rain % | Wind | ||
|---|---|---|---|---|---|---|
| 7 AM☽ | 72°F | Partly Cloudy | 0% | 5 mph S | ||
| 8 AM☽ | 71°F | Partly Cloudy | 0% | 5 mph SW | ||
| 9 AM☽ | 70°F | Partly Cloudy | 0% | 0 mph | ||
| 10 AM☽ | 70°F | Partly Cloudy | 0% | 0 mph | ||
| 11 AM☽ | 70°F | Partly Cloudy | 0% | 0 mph | ||
| 12 PM☽ | 69°F | Mostly Cloudy | 0% | 0 mph | ||
| 1 PM | 69°F | Partly Sunny | 0% | 0 mph | ||
| 2 PM | 70°F | Partly Sunny | 0% | 0 mph | ||
| 3 PM | 72°F | Mostly Sunny | 0% | 0 mph | ||
| 4 PM | 74°F | Mostly Sunny | 0% | 0 mph | ||
| 5 PM | 78°F | Mostly Sunny | 0% | 5 mph SW | ||
| 6 PM | 81°F | Sunny | 0% | 5 mph SW | ||
| 7 PM | 82°F | Sunny | 0% | 5 mph SW | ||
| 8 PM | 82°F | Sunny | 0% | 10 mph SW | ||
| 9 PM | 82°F | Sunny | 0% | 10 mph W | ||
| 10 PM | 82°F | Sunny | 0% | 10 mph W | ||
| 11 PM | 82°F | Sunny | 0% | 10 mph W | ||
| 12 AM | 82°F | Sunny | 0% | 10 mph W | ||
| 1 AM☽ | 80°F | Clear | 0% | 10 mph W | ||
| 2 AM☽ | 78°F | Clear | 0% | 5 mph W | ||
| 3 AM☽ | 75°F | Clear | 0% | 5 mph W | ||
| 4 AM☽ | 73°F | Clear | 0% | 5 mph W | ||
| 5 AM☽ | 73°F | Clear | 0% | 5 mph W | ||
| 6 AM☽ | 72°F | Partly Cloudy | 0% | 5 mph S | ||
Precipitation Timeline
No significant precipitation expected tomorrow.
What to Wear Tomorrow
Hot — wear breathable, light clothing
Clothing
- • Light t-shirt or tank top
- • Shorts or light skirt
- • Hat for sun protection
Footwear
Sandals or breathable sneakers
Accessories
- • Sunglasses
- • Sunscreen
Conditions
High: 82°F
Low: 69°F
Wind: 0-10 mph
Rain: 0%
Enjoy your day!
Best Time to Be Outside Tomorrow
1 PM – 2 PM
Excellent conditions for outdoor activities (dry, comfortable temp, light wind, daylight)
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More for Costa Mesa, CA
- Will it rain tomorrow in Costa Mesa?
- What time will it rain tomorrow in Costa Mesa?
- Weather tomorrow by hour in Costa Mesa
- Heat index tomorrow by zip code near Costa Mesa
- Dew point tomorrow by zip code near Costa Mesa
- Wind chill tomorrow by zip code near Costa Mesa
- Snow forecast tomorrow by zip code near Costa Mesa
- What to wear tomorrow in Costa Mesa
- Best time to be outside tomorrow in Costa Mesa
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Frequently Asked Questions
What is the weather forecast for tomorrow in Costa Mesa, CA?
Tomorrow in Costa Mesa: High of 82°F, Low of 69°F. Clear with 0% chance of precipitation. Wind 0-10 mph.
Will it rain tomorrow in Costa Mesa?
No significant precipitation expected tomorrow.
What should I wear tomorrow in Costa Mesa?
With a high of 82°F and low of 69°F, check our "What to Wear" section above for specific clothing recommendations based on temperature, wind, and precipitation.
How accurate is this forecast?
Our forecasts come directly from the National Weather Service (NOAA), which provides some of the most accurate weather predictions available. Tomorrow forecasts are generally 80-90% accurate, with accuracy decreasing the further out you look. Data is refreshed every 30 minutes.