UV Index for Costa Mesa, CA

Current Costa Mesa UV Index

0 (Low)

Last Updated 27 minutes ago

Hourly Costa Mesa UV Index

The hourly Costa Mesa, CA UV Index forecast for Wednesday, November 5th, 2025.

5 Day Hourly Costa Mesa UV Index Forecast

Last Updated 12 hours ago

The UV index forecast for the next five days in Costa Mesa, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Costa Mesa over the next five days will be 4.9 on Wednesday, November 5th at 12:00 pm.

The UV index forecast for Wednesday, November 5th in Costa Mesa, CA is below.

Time UV Index Risk
11pm 0
Low

The UV index forecast for Thursday, November 6th in Costa Mesa, CA is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.6
Low
9am 1.4
Low
10am 2.3
Low
11am 2.9
Low
12pm 3.8
Moderate
1pm 4.2
Moderate
2pm 2.9
Low
3pm 1.4
Low
4pm 0.4
Low
5pm 0
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, November 7th in Costa Mesa, CA is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.6
Low
9am 1.7
Low
10am 3.1
Moderate
11am 4.2
Moderate
12pm 4.6
Moderate
1pm 4
Moderate
2pm 2.7
Low
3pm 1.4
Low
4pm 0.4
Low
5pm 0
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, November 8th in Costa Mesa, CA is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.6
Low
9am 1.6
Low
10am 2.9
Low
11am 4
Moderate
12pm 4.4
Moderate
1pm 3.8
Moderate
2pm 2.6
Low
3pm 1.3
Low
4pm 0.4
Low
5pm 0
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, November 9th in Costa Mesa, CA is below.

Time UV Index Risk
12am 0
Low
1am 0
Low
2am 0
Low
3am 0
Low
4am 0
Low