Observed 3:35 AM PDT at KSNA

Costa Mesa, CA weather

Overcast and 61°16°, 9°5° colder than a typical Oct 23.

Mostly agree

Now 61°16°

Cloudy

Wind: 7 mph11 km/h; From the east-southeast. Up to 10 mph16 km/h through 4 PM
Dew point: 57°14°; A little sticky
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air today: 37Good; EPA forecast · Ozone
Pressure: 29.99 inHg1016 hPa; Steady over the last 3 h

Light rain starting around 7:15 AM.

From forecast models

Next 48 hours

7°4° cooler than this time yesterday (67°19° then, 60°16° now)

Good hours for

Rain until 5 AM (40%)
Low 57°14° today at 7 AM
High 69°21° today at 2 PM

TonightNear 58°14° · Rain 4–5 AM (40%)
This morningUp to 66°19° by 11 AM · Clear
This afternoonNear 69°21° · Partly cloudy
TonightDown to 57°14° by 4 AM · Clear
Tomorrow morningUp to 70°21° by 11 AM · Clear
Tomorrow afternoonNear 73°23° · Clear
Tomorrow nightDown to 63°17° by 2 AM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 4a	Cloudy	58°14° (likely 58°14° to 61°16°)	58°14°	40%, 0.03 in0.8 mm	5 mph8 km/h from NE, gusts 7 mph12 km/h	100%	62%	0
Fri 5a	Mostly cloudy	58°14° (likely 58°14° to 61°16°)	58°14°	10%	0 mph0 km/h, gusts 6 mph9 km/h	99%	45%	0
Fri 6a	Clear	58°14° (likely 57°14° to 61°16°)	58°14°	10%	0 mph0 km/h, gusts 5 mph8 km/h	97%	20%	0
Fri 7a	Sunny	57°14° (likely 56°13° to 60°16°)	57°14°	10%	5 mph8 km/h from N, gusts 5 mph8 km/h	100%	11%	0
Fri 8a	Sunny	60°16° (likely 57°14° to 61°16°)	60°16°	10%	5 mph8 km/h from N, gusts 4 mph6 km/h	98%	9%	0
Fri 9a	Sunny	63°17° (likely 60°16° to 64°18°)	63°17°	10%	0 mph0 km/h, gusts 4 mph6 km/h	92%	10%	1
Fri 10a	Sunny	65°18° (likely 64°18° to 67°19°)	65°18°	10%	5 mph8 km/h from NW, gusts 4 mph6 km/h	85%	13%	2
Fri 11a	Sunny	66°19° (likely 66°19° to 69°21°)	67°19°	10%	5 mph8 km/h from NW, gusts 5 mph8 km/h	80%	13%	3
Fri 12p	Partly sunny	68°20° (likely 68°20° to 72°22°)	68°20°	10%	5 mph8 km/h from W, gusts 7 mph11 km/h	77%	28%	3
Fri 1p	Partly sunny	68°20° (likely 68°20° to 73°23°)	68°20°	10%	5 mph8 km/h from W, gusts 8 mph13 km/h	75%	34%	4
Fri 2p	Partly sunny	69°21° (likely 69°21° to 74°23°)	69°21°	10%	5 mph8 km/h from W, gusts 10 mph16 km/h	72%	32%	4
Fri 3p	Sunny	69°21° (likely 69°21° to 73°23°)	69°21°	10%	10 mph16 km/h from W, gusts 11 mph18 km/h	72%	18%	3
Fri 4p	Sunny	69°21° (likely 69°21° to 72°22°)	69°21°	10%	10 mph16 km/h from W, gusts 13 mph20 km/h	72%	16%	1
Fri 5p	Mostly sunny	69°21° (likely 68°20° to 70°21°)	69°21°	5%	10 mph16 km/h from W, gusts 12 mph19 km/h	71%	27%	1
Fri 6p	Mostly clear	67°19° (likely 67°19° to 68°20°)	67°19°	5%	5 mph8 km/h from W, gusts 11 mph18 km/h	76%	24%	0
Fri 7p	Partly cloudy	65°18° (likely 65°18° to 67°19°)	65°18°	5%	5 mph8 km/h from SW, gusts 8 mph12 km/h	83%	58%	0
Fri 8p	Mostly clear	64°18° (likely 63°17° to 66°19°)	64°18°	5%	5 mph8 km/h from SW, gusts 5 mph8 km/h	86%	36%	0
Fri 9p	Partly cloudy	62°17° (likely 62°17° to 65°18°)	62°17°	5%	0 mph0 km/h, gusts 3 mph6 km/h	92%	51%	0
Fri 10p	Clear	61°16° (likely 60°16° to 64°18°)	61°16°	5%	0 mph0 km/h, gusts 3 mph5 km/h	94%	11%	0
Fri 11p	Clear	60°16° (likely 59°15° to 63°17°)	60°16°	0%	0 mph0 km/h, gusts 4 mph7 km/h	97%	1%	0
Sat 12a	Clear	60°16° (likely 58°14° to 62°17°)	60°16°	0%	0 mph0 km/h, gusts 5 mph8 km/h	99%	1%	0
Sat 1a	Mostly clear	59°15° (likely 57°14° to 61°16°)	59°15°	0%	0 mph0 km/h, gusts 5 mph8 km/h	96%	12%	0
Sat 2a	Mostly clear	59°15° (likely 56°13° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 4 mph7 km/h	96%	14%	0
Sat 3a	Mostly clear	58°14° (likely 55°13° to 60°16°)	58°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	98%	16%	0
Sat 4a	Mostly clear	57°14° (likely 54°12° to 59°15°)	57°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	96%	17%	0
Sat 5a	Mostly clear	57°14° (likely 54°12° to 59°15°)	57°14°	0%	0 mph0 km/h, gusts 6 mph10 km/h	99%	15%	0
Sat 6a	Mostly clear	56°13° (likely 53°12° to 58°14°)	56°13°	0%	0 mph0 km/h, gusts 7 mph11 km/h	100%	16%	0
Sat 7a	Mostly sunny	56°13° (likely 53°12° to 58°14°)	56°13°	0%	5 mph8 km/h from E, gusts 6 mph10 km/h	100%	15%	0
Sat 8a	Mostly sunny	58°14° (likely 54°12° to 60°16°)	58°14°	0%	0 mph0 km/h, gusts 5 mph9 km/h	99%	12%	0
Sat 9a	Sunny	64°18° (likely 58°14° to 64°18°)	64°18°	0%	0 mph0 km/h, gusts 4 mph7 km/h	84%	4%	1
Sat 10a	Sunny	67°19° (likely 64°18° to 68°20°)	67°19°	0%	0 mph0 km/h, gusts 3 mph5 km/h	75%	2%	3
Sat 11a	Sunny	70°21° (likely 68°20° to 71°22°)	70°21°	0%	5 mph8 km/h from NW, gusts 4 mph7 km/h	67%	1%	4
Sat 12p	Sunny	72°22° (likely 71°22° to 75°24°)	72°22°	0%	5 mph8 km/h from W, gusts 8 mph13 km/h	64%	2%	5
Sat 1p	Sunny	73°23° (likely 73°23° to 78°26°)	73°23°	0%	5 mph8 km/h from W, gusts 7 mph11 km/h	61%	0%	6
Sat 2p	Sunny	74°23° (likely 74°23° to 79°26°)	74°23°	0%	10 mph16 km/h from W, gusts 9 mph14 km/h	59%	0%	5
Sat 3p	Sunny	74°23° (likely 74°23° to 79°26°)	74°23°	0%	10 mph16 km/h from W, gusts 11 mph17 km/h	60%	0%	4
Sat 4p	Sunny	75°24° (likely 73°23° to 78°26°)	75°24°	0%	10 mph16 km/h from W, gusts 11 mph18 km/h	59%	0%	3
Sat 5p	Sunny	74°23° (likely 72°22° to 76°24°)	74°23°	0%	10 mph16 km/h from W, gusts 11 mph18 km/h	60%	0%	2
Sat 6p	Clear	72°22° (likely 69°21° to 72°22°)	72°22°	0%	10 mph16 km/h from W, gusts 10 mph16 km/h	65%	0%	0
Sat 7p	Clear	73°23° (likely 66°19° to 73°23°)	73°23°	0%	5 mph8 km/h from W, gusts 8 mph12 km/h	64%	0%	0
Sat 8p	Clear	68°20° (likely 63°17° to 68°20°)	69°21°	0%	5 mph8 km/h from W, gusts 4 mph6 km/h	74%	0%	0
Sat 9p	Clear	71°22° (likely 61°16° to 71°22°)	71°22°	0%	0 mph0 km/h, gusts 3 mph6 km/h	66%	0%	0
Sat 10p	Clear	71°22° (likely 59°15° to 71°22°)	71°22°	0%	0 mph0 km/h, gusts 4 mph6 km/h	67%	0%	0
Sat 11p	Clear	65°18° (likely 58°14° to 68°20°)	65°18°	0%	0 mph0 km/h, gusts 4 mph6 km/h	80%	0%	0
Sun 12a	Clear	70°21° (likely 54°12° to 71°22°)	70°21°	0%	5 mph8 km/h from S, gusts 4 mph6 km/h	67%	0%	0
Sun 1a	Mostly clear	70°21° (likely 53°12° to 70°21°)	70°21°	0%	5 mph8 km/h from SE, gusts 4 mph6 km/h	67%	11%	0
Sun 2a	Clear	63°17° (likely 52°11° to 70°21°)	63°17°	0%	5 mph8 km/h from SE, gusts 4 mph6 km/h	83%	11%	0
Sun 3a	Mostly clear	68°20° (likely 51°11° to 69°21°)	68°20°	0%	5 mph8 km/h from SE, gusts 4 mph6 km/h	68%	5%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 23. Drizzle. High 70°21°, low 57°14°. Typical 79°26° / 58°14°. Rain 0.04 in1 mm, 10% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 60°16°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 64°18°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 57°14°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 70. Northwest wind 0 to 10 mph.
Tonight: A chance of rain showers before 5am. Mostly cloudy, with a low around 57. Northeast wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
70°21°–74°23°
Low, likely
56°13°–60°16°
Typical high / low
79°26° / 58°14°
Wind
10 mph16 km/h, gusts 17 mph27 km/h
UV peak
5
Tomorrow, Oct 24. Sunny. High 75°24°, low 58°14°. Typical 78°26° / 58°14°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 68°20°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 58°14°
  Dry
Official NWS forecast
Day: Sunny, with a high near 75. Northwest wind 0 to 10 mph.
Night: Mostly clear, with a low around 58. South wind 0 to 10 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
74°23°–79°26°
Low, likely
53°12°–58°14°
Typical high / low
78°26° / 58°14°
Wind
9 mph14 km/h, gusts 17 mph27 km/h
UV peak
6
Sunday, Oct 25. Mostly sunny. High 78°26°, low 59°15°. Typical 78°26° / 58°14°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 80°27°
  Dry
3. Evening
  6 PM–midnight
  Clear, 69°21°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 58°15°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 78.
Night: Mostly clear, with a low around 59.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
77°25°–82°28°
Low, likely
51°11°–64°18°
Typical high / low
78°26° / 58°14°
Wind
8 mph13 km/h, gusts 17 mph27 km/h
UV peak
5
Monday, Oct 26. Mostly sunny. High 79°26°, low 58°14°. Typical 78°26° / 58°14°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 81°27°
  Dry
3. Evening
  6 PM–midnight
  Clear, 69°20°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 58°14°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 79.
Night: Mostly clear, with a low around 58.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
77°25°–82°28°
Low, likely
49°9°–65°18°
Typical high / low
78°26° / 58°14°
Wind
12 mph19 km/h, gusts 19 mph31 km/h
UV peak
5
Tuesday, Oct 27. Partly sunny. High 76°24°, low 57°14°. Typical 78°26° / 57°14°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 66°19°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 58°14°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 76.
Night: Partly cloudy, with a low around 57.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
73°23°–78°26°
Low, likely
51°11°–64°18°
Typical high / low
78°26° / 57°14°
Wind
10 mph16 km/h, gusts 15 mph25 km/h
UV peak
5
Wednesday, Oct 28. Mostly cloudy. High 74°23°, low 57°14°. Typical 78°26° / 57°14°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 66°19°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 60°15°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 74.
Night: Mostly cloudy, with a low around 57.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–77°25°
Low, likely
52°11°–62°17°
Typical high / low
78°26° / 57°14°
Wind
13 mph21 km/h
UV peak
5
Thursday, Oct 29. Mostly cloudy. High 72°22°, low 60°16°. Typical 78°26° / 57°14°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 61°16°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 66°19°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 62°17°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 72.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
71°22°–74°23°
Low, likely
54°12°–64°18°
Typical high / low
78°26° / 57°14°
Wind
9 mph15 km/h, gusts 18 mph29 km/h
UV peak
5
Friday, Oct 30. Mostly sunny. High 72°22°, low 61°16°. Typical 78°26° / 57°14°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 63°17°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 67°19°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 64°18°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
69°21°–75°24°
Low, likely
55°13°–65°18°
Typical high / low
78°26° / 57°14°
Wind
8 mph12 km/h, gusts 21 mph34 km/h
UV peak
5
Saturday, Oct 31. Cloudy. High 70°21°, low 62°17°. Typical 78°26° / 56°13°. Rain 0.9 in23 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 65°18°
  20% chance · 0.01 in0.3 mm
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  20% chance · 0.22 in5.7 mm
3. Evening
  6 PM–midnight
  Cloudy, 68°20°
  30% chance · 0.87 in22 mm
4. Overnight
  midnight–6 AM
  Cloudy, 67°20°
  40% chance · 0.28 in7.1 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
65°18°–76°24°
Low, likely
59°15°–65°18°
Typical high / low
78°26° / 56°13°
Wind
9 mph14 km/h, gusts 17 mph28 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 74°23°, low 64°18°. Typical 77°25° / 56°13°. Rain 0.5 in13 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 68°20°
  40% chance · 0.45 in11 mm
2. Afternoon
  noon–6 PM
  Drizzle, 73°23°
  40% chance · 0.04 in1 mm
3. Evening
  6 PM–midnight
  Cloudy, 71°22°
  40% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
71°22°–81°27°
Low, likely
58°14°–68°20°
Typical high / low
77°25° / 56°13°
Wind
12 mph20 km/h, gusts 25 mph40 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 70°, low 57°.
Tomorrow
Dry, high 75°, low 58°, warming up.
Sunday
Dry, high 78°, low 59°, warming up.
Rest of week
Mostly dry, highs 70–79°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (SGX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Cooling this week

About 73% less cooling than a typical week.

This week 5Typical 20

Cooling degree days, base 65°F

Comfort

Comfortable, non-humid air (dew point 57°F).

Open the windows?

Today, 10:00 AM–12:00 AM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

SANTA ANA FIRE STATION · official normals 1991–2020 · records 1916–2026

Oct 23, today vs a typical year

Today’s expected high is 9°5° colder than typical.

Last 7 days vs normal

—SatOct 17
—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23

Costa Mesa weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 11 h 5 min; Losing 1 min 53 s a day; shortest Dec 21, 1 h 10 min less
Golden hour: 5:34–6:23 PM; Morning 6:47–7:37 AM
Blue hour: 6:23–6:33 PM; Morning 6:37–6:47 AM; first light 6:37 AM

Stars tonight? Poor

Clouds most of the night (about 42% cover).

Moon

Waxing gibbous

91% lit · growing

Today: sets 4:22 AM · rises 4:36 PM
Full moon: Oct 25
New moon: Nov 8

Looking northeast from Costa Mesa. The highest point on the skyline is about 10,000 ft, 46 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.