Current Conditions

Costa Mesa, California

88°F31°C

Hot

Feels like92°F33°C

Wind

WNW 10 mph16 km/h

Humidity

53%

Cloud Cover

26%

As of Tuesday, September 8, 2026 at 5:50 PM PDT

Today's Outlook

Day

Mostly clear and hot, with a high of 93°F34°C and morning low of 80°F26°C — feels like 99°F37°C. Breezy from the W at 6 to 8 mph9 to 14 km/h. Heat risk in the afternoon.

Night

Partly cloudy, with a low around 76°F25°C. Light wind from the ESE around 4 mph6 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Hot	High 93°F34°CFeels 98°F37°C	Low 76°F25°C	Precip 0 in0.1 mm4%	Cloud 24%	Wind W 5 mph7 km/h	Wednesday: Mostly clear and hot, with a high of 93°F34°C and morning low of 80°F26°C — feels like 99°F37°C. Breezy from the W at 6 to 8 mph9 to 14 km/h. Heat risk in the afternoon. Wednesday Night: Partly cloudy, with a low around 76°F25°C. Light wind from the ESE around 4 mph6 km/h.
Clear	High 86°F30°CFeels 89°F32°C	Low 76°F24°C	Precip 0 in0 mm—	Cloud 16%	Wind S 5 mph8 km/h	Thursday: Mostly clear and warm, with a high of 86°F30°C and morning low of 78°F26°C. Breezy from the SSW at 6 to 7 mph10 to 12 km/h. Humid. Thursday Night: Mostly clear, with a low around 76°F24°C. Light wind from the SSE around 4 mph7 km/h.
Clear	High 82°F28°CFeels 85°F30°C	Low 74°F23°C	Precip 0 in0 mm—	Cloud 7%	Wind S 5 mph9 km/h	Friday: Mostly clear and warm, with a high of 82°F28°C and morning low of 76°F25°C. Breezy from the SSW at 6 to 8 mph10 to 12 km/h. Humid. Friday Night: Mostly clear, with a low around 74°F23°C. Light wind from the S around 4 mph7 km/h.
Clear	High 80°F27°C	Low 71°F22°C	Precip 0 in0 mm—	Cloud 20%	Wind SW 5 mph8 km/h	Saturday: Mostly clear and warm, with a high of 80°F27°C and morning low of 73°F23°C. Breezy from the SW at 6 to 8 mph10 to 14 km/h. Humid. Saturday Night: Mostly clear, with a low around 71°F22°C. Light wind from the SW around 4 mph6 km/h.
Clear	High 80°F27°C	Low 70°F21°C	Precip 0 in0 mm—	Cloud 22%	Wind SW 5 mph7 km/h	Sunday: Mostly clear and warm, with a high of 80°F27°C and morning low of 72°F22°C. Breezy from the SW at 6 to 8 mph9 to 13 km/h. Humid. Sunday Night: Mostly clear, with a low around 70°F21°C. Light wind from the SSW around 3 mph5 km/h.
Clear	High 79°F26°C	Low 69°F21°C	Precip 0 in0 mm—	Cloud 16%	Wind S 5 mph8 km/h	Monday: Mostly clear and warm, with a high of 79°F26°C and morning low of 71°F22°C. Breezy from the SSW at 6 to 8 mph10 to 12 km/h. Humid. Monday Night: Mostly clear, with a low around 69°F21°C. Light wind from the S around 4 mph6 km/h.
Clear	High 78°F26°C	Low 69°F20°C	Precip 0 in0 mm—	Cloud 22%	Wind SSW 5 mph8 km/h	Tuesday: Mostly clear and warm, with a high of 78°F26°C and morning low of 71°F22°C. Breezy from the SSW at 6 to 8 mph10 to 12 km/h. Tuesday Night: Mostly clear, with a low around 69°F20°C. Light wind from the S around 4 mph6 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 9	93°F34°C Feels 98°F37°C	76°F25°C	0 in0.1 mm· 4%	24%	Hot	W 5 mph7 km/h
DayMostly clear and hot, with a high of 93°F34°C and morning low of 80°F26°C — feels like 99°F37°C. Breezy from the W at 6 to 8 mph9 to 14 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 76°F25°C. Light wind from the ESE around 4 mph6 km/h.
	ThursdaySep 10	86°F30°C Feels 89°F32°C	76°F24°C	0 in0 mm· —	16%	Clear	S 5 mph8 km/h
DayMostly clear and warm, with a high of 86°F30°C and morning low of 78°F26°C. Breezy from the SSW at 6 to 7 mph10 to 12 km/h. Humid. NightMostly clear, with a low around 76°F24°C. Light wind from the SSE around 4 mph7 km/h.
	FridaySep 11	82°F28°C Feels 85°F30°C	74°F23°C	0 in0 mm· —	7%	Clear	S 5 mph9 km/h
DayMostly clear and warm, with a high of 82°F28°C and morning low of 76°F25°C. Breezy from the SSW at 6 to 8 mph10 to 12 km/h. Humid. NightMostly clear, with a low around 74°F23°C. Light wind from the S around 4 mph7 km/h.
	SaturdaySep 12	80°F27°C	71°F22°C	0 in0 mm· —	20%	Clear	SW 5 mph8 km/h
DayMostly clear and warm, with a high of 80°F27°C and morning low of 73°F23°C. Breezy from the SW at 6 to 8 mph10 to 14 km/h. Humid. NightMostly clear, with a low around 71°F22°C. Light wind from the SW around 4 mph6 km/h.
	SundaySep 13	80°F27°C	70°F21°C	0 in0 mm· —	22%	Clear	SW 5 mph7 km/h
DayMostly clear and warm, with a high of 80°F27°C and morning low of 72°F22°C. Breezy from the SW at 6 to 8 mph9 to 13 km/h. Humid. NightMostly clear, with a low around 70°F21°C. Light wind from the SSW around 3 mph5 km/h.
	MondaySep 14	79°F26°C	69°F21°C	0 in0 mm· —	16%	Clear	S 5 mph8 km/h
DayMostly clear and warm, with a high of 79°F26°C and morning low of 71°F22°C. Breezy from the SSW at 6 to 8 mph10 to 12 km/h. Humid. NightMostly clear, with a low around 69°F21°C. Light wind from the S around 4 mph6 km/h.
	TuesdaySep 15	78°F26°C	69°F20°C	0 in0 mm· —	22%	Clear	SSW 5 mph8 km/h
DayMostly clear and warm, with a high of 78°F26°C and morning low of 71°F22°C. Breezy from the SSW at 6 to 8 mph10 to 12 km/h. NightMostly clear, with a low around 69°F20°C. Light wind from the S around 4 mph6 km/h.
	WednesdaySep 16	78°F26°C	68°F20°C	0 in0 mm· —	24%	Clear	SW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 78°F26°C and morning low of 70°F21°C. Breezy from the SW at 6 to 8 mph9 to 13 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the SW around 3 mph5 km/h.
	ThursdaySep 17	79°F26°C	68°F20°C	0 in0 mm· —	27%	Clear	WSW 5 mph8 km/h
DayPartly cloudy and warm, with a high of 79°F26°C and morning low of 70°F21°C. Breezy from the WSW at 6 to 9 mph10 to 15 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the WSW around 3 mph6 km/h.
	FridaySep 18	80°F27°C	68°F20°C	0 in0 mm· —	30%	Clear	WSW 5 mph8 km/h
DayPartly cloudy and warm, with a high of 80°F27°C and morning low of 70°F21°C. Breezy from the WSW at 6 to 9 mph10 to 15 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the WSW around 3 mph5 km/h.
	SaturdaySep 19	80°F27°C	69°F20°C	0 in0.1 mm· 3%	32%	Clear	WSW 5 mph8 km/h
DayPartly cloudy and warm, with a high of 80°F27°C and morning low of 71°F21°C. Breezy from the WSW at 6 to 9 mph10 to 14 km/h. NightPartly cloudy, with a low around 69°F20°C. Light wind from the SW around 3 mph5 km/h.
	SundaySep 20	80°F26°C	68°F20°C	0 in0 mm· —	33%	Clear	SW 5 mph8 km/h
DayPartly cloudy and warm, with a high of 80°F26°C and morning low of 71°F21°C. Breezy from the SW at 6 to 8 mph10 to 14 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the SW around 4 mph6 km/h.
	MondaySep 21	79°F26°C	68°F20°C	0.01 in0.2 mm· 3%	32%	Clear	SW 5 mph8 km/h
DayPartly cloudy and warm, with a high of 79°F26°C and morning low of 70°F21°C. Breezy from the SW at 6 to 9 mph10 to 14 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the SW around 4 mph6 km/h.
	TuesdaySep 22	79°F26°C	68°F20°C	0 in0.1 mm· 3%	35%	Clear	SW 5 mph8 km/h
DayPartly cloudy and warm, with a high of 79°F26°C and morning low of 70°F21°C. Breezy from the SW at 6 to 9 mph10 to 14 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the SW around 4 mph6 km/h.
	WednesdaySep 23	80°F26°C	68°F20°C	0 in0.1 mm· 3%	36%	Clear	SW 5 mph8 km/h
DayPartly cloudy and warm, with a high of 80°F26°C and morning low of 70°F21°C. Breezy from the WSW at 6 to 9 mph10 to 15 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the S around 3 mph5 km/h.

Nearby Cities

Newport Beach2 mi3 km UC Irvine4 mi7 km Huntington Beach5 mi8 km Fountain Valley5 mi8 km Irvine6 mi9 km Tustin Legacy7 mi11 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 33.6411°N, 117.9187°W·Elevation: 30m·Timezone: America/Los_Angeles·Population: 113,204