NWS Forecast Office Houston/Galveston, TX

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Last Map Update: Tue, Sep 15, 2026 at 2:30:15 am CDT

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Heat Advisory

Tonight

Tuesday

Extended Weather Outlook

Hot and humid conditions are expected to continue on Tuesday. Highswill generally be in the mid to upper 90s with peak heat indices in the 106-109F range. A Heat Advisory is now in effect until Tuesday evening. Remember to practice heat safety wherever you are by staying cool, taking frequent breaks, and drinking plenty of water.

It will be another warm, muggy night as temperatures dip into the mid-70s to around 80°F inland and hold in the upper 70s to low 80s along the coast. A few coastal showers will be possible near sunrise.

Tuesday will bring another round of hot and humid weather, with temperatures ranging from the mid-to-upper 90s and hitting the low 100s across the Brazos Valley. Peak heat indices could reach 109°F across most of Southeast Texas. A Heat Advisory remains in effect until 7 PM Tuesday.

Daily chances for showers and thunderstorms continues with decreasing chances Thursday and Friday. Highs will be mainly in the mid 90s with peak heat indices 107-109F at least through mid-week.

Current Weather Observations...

Location	Time (CDT)	Weather	Vsby. (SM)	Temp. (ºF)	Dewpt. (ºF)	Hum. (%)	Wind (mph)	Wind Chill / Heat Index (ºF)	Pres. (in)
Bryan	01:55	Clear	10	81	76	84	S 8	-	30.03
College Station	01:53	Clear	10	80	76	87	S 6	-	30.01
Caldwell	01:55	Clear	10	80	75	83	S 6	-	30.03
Huntsville	01:53	Clear	10	79	76	90	S 5	-	30.02
Navasota	02:15	Clear	7	78	78	100	SSE 5	-	30.00
Brenham	02:15	Clear	10	79	76	91	SSE 3	-	30.01
Conroe	01:53	Clear	10	77	76	96	CALM	-	30.02
Cleveland	02:15	Clear	7				CALM	-	30.03
Liberty	02:15	Clear	7	77	77	100	CALM	-	30.01
Columbus	02:15	Clear	10	79	77	95	CALM	-	30.02
Spring	01:53	Clear	8	76	76	100	S 3	-	30.01
Houston Intercontinental Aprt	01:53	Mostly Clear	10	82	78	87	S 5	91 [HI]	30.01
Katy/Brookshire	02:15	Clear	9	80	80	100	S 6	-	30.03
Texas Medical Center Heliport	02:15	Mostly Clear	7	82	78	88	S 12	91 [HI]	30.00
Sugar Land	01:53	Clear	10	80	78	93	S 3	-	30.01
Houston Hobby Airport	01:53	Mostly Clear	10	81	77	87	S 7	-	30.00
Arcola/Sienna	02:15	Clear	10	78	76	95	CALM	-	30.02
Pearland	01:53	Clear	10	80	77	90	CALM	-	30.02
Ellington Field	23:54	Clear	10	80	77	88	CALM	-	29.99
La Porte	02:15	Clear	10	82	77	83	SSW 7	-	30.02
Wharton	02:15	Partly Cloudy	10	78	76	93	CALM	-	30.02
Galveston	01:52	Mostly Clear	10	84	77	79	S 13	94 [HI]	30.01
Bay City	02:15	Clear	10	80	80	100	SSE 3	-	29.97
Palacios	02:16	Mostly Cloudy	10	86	79	79	S 10	100 [HI]	29.99
Rig 20 Miles SE of Galveston	02:15	Partly Cloudy	10	86	77	74	S 13	97 [HI]	30.02
Rig 20 Miles SE of Matagorda	02:20		10	86	80	84	SSE 14G20	101 [HI]	30.04

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