Weather in Port Isabel

14-day forecast · updated today, Thursday, October 29, at 2:42 am (CDT)

Now · light drizzle 77 °F

Feels like: 81 °F
Low / high: 75 / 82 °F
Rain: 19% · 0.09 in
Wind: 10 mph ESE

→ 30.04 inHg · steady UV 7 · high

Today in Port Isabel: light drizzle, 75 °F to 82 °F, with a 19% chance of rain (0.09 in) and a gentle breeze from the east-southeast (10 mph). Tomorrow, overcast, 73 °F to 83 °F and a 11% chance of rain. The warmest day of the week is Monday 2, at 84 °F. No significant rain expected over the next 7 days.

Temperatures for the next 14 days

82° 75°
Today
83° 73°
Fri 30
83° 74°
Sat 31
82° 74°
Sun 1
84° 74°
Mon 2
83° 75°
Tue 3
78° 70°
Wed 4
77° 68°
Thu 5
77° 68°
Fri 6
78° 70°
Sat 7
79° 66°
Sun 8
76° 58°
Mon 9
76° 64°
Tue 10
73° 60°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Light drizzle	75 / 82 °F	19% · 0.09 in	16 mph ESE	2.6 ft	11:00 pm	HRRR + NBM
Fri 30	Overcast	73 / 83 °F	11%	13 mph SE	2.6 ft	—	NBM
Sat 31	Light drizzle	74 / 83 °F	7%	10 mph ESE	2.0 ft	12:04 am	NBM
Sun 1	Drizzle	74 / 82 °F	3%	11 mph E	1.7 ft	12:50 am	NBM
Mon 2	Light drizzle	74 / 84 °F	0%	16 mph SE	2.2 ft	12:22 am	NBM
Tue 3	Drizzle	75 / 83 °F	22% · 0.02 in	19 mph SSE	2.9 ft	12:23 am	NBM
Wed 4	Drizzle	70 / 78 °F	22% · 0.03 in	16 mph NNW	2.3 ft	12:08 am · 11:34 am	NBM
Thu 5	Clear sky	68 / 77 °F	4%	15 mph N	3.4 ft	12:01 am · 1:39 pm · 11:55 pm	NBM
Fri 6	Clear sky	68 / 77 °F	2%	15 mph ENE	5.6 ft	3:10 pm	NBM
Sat 7	Clear sky	70 / 78 °F	9% · 0.05 in	15 mph SE	5.6 ft	4:16 pm	NBM
Sun 8	Overcast	66 / 79 °F	13% · 0.09 in	16 mph SE	2.7 ft	5:23 pm	NBM + ECMWF
Mon 9	Partly cloudy	58 / 76 °F	26%	9 mph NNE	1.5 ft	6:24 pm	ECMWF
Tue 10	Mainly clear	64 / 76 °F	24%	12 mph NNE	2.3 ft	7:16 pm	ECMWF
Wed 11	Clear sky	60 / 73 °F	31%	14 mph NNW	3.7 ft	8:15 pm	ECMWF

Each hour comes from the best model for this spot: HRRR until Thursday 29 9:00 pm; then NBM until Sunday 8 7:00 pm; then ECMWF until Thursday 12 9:00 am; then GFS.

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Overcast	Light drizzle	Mainly clear	Mainly clear	Light drizzle	Mainly clear	Mainly clear	Partly cloudy
Temperature	77°	77°	76°	79°	81°	77°	80°	76°
Chance of rain	19%	15%	4%	3%	3%	2%	1%	1%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in
Wind (mph)	11 SE	10 SE	8 SE	8 ESE	16 ESE	7 SSE	11 E	11 E
Humidity	83%	80%	77%	73%	75%	82%	59%	70%
UV	0	0	0	1	6	5	0	0
Model	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	NBM

Do the models agree?

Medium confidence

They broadly agree, but not quite on rain today: take it with some caution.

What 6 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	82°	83°	83°	83°	85°	85°	76°
AIFS	82°	83°	84°	84°	84°	85°	77°
GFS	79°	80°	81°	80°	81°	83°	77°
ICON	83°	85°	84°	83°	83°	87°	82°
HRRR	82°	85°	—	—	—	—	—
NBM	81°	83°	83°	82°	84°	83°	78°
Confidence	high	high	high	high	high	high	high

Do the models agree? · Rain
Rain	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	0.04 in	0	0.06 in	0.09 in	0.02 in	0.19 in	0.03 in
AIFS	0	0.05 in	0.05 in	0.05 in	0.02 in	0.13 in	0.09 in
GFS	0.05 in	0.02 in	0.04 in	0	0	0.04 in	0
ICON	0.02 in	0	0	0	0	0	0.01 in
HRRR	0.09 in	0	—	—	—	—	—
NBM	0.03 in	0	0	0	0	0.02 in	0.03 in
Confidence	medium	high	medium	medium	high	medium	high

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	1322	1120	915	923	1430	2132	1526
AIFS	13	11	8	8	15	15	17
GFS	1619	1415	1114	1115	1825	2128	1921
ICON	1019	1121	917	1222	1019	1426	918
HRRR	1619	1618	—	—	—	—	—
NBM	1417	1315	1012	1113	1619	1921	1618
Confidence	high	high	high	high	high	high	high

Chance of rain from the ensemble models

Model	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF (51 scenarios)	16%	16%	58%	51%	22%	39%	31%
GFS (GEFS, 31 scenarios)	88%	26%	23%	10%	2%	27%	26%
NBM (NOAA)	19%	11%	7%	3%	0%	22%	22%
Thunderstorm (NBM)	3%	8%	11%	11%	9%	18%	18%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: normal temperatures and a bit wetter.

Next 6 weeks

When	TemperatureTemp.	Rain	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	A bit above +2.0 °F	A bit above +32%	—
Nov 9 – Nov 15Nov 9–Nov 15	A bit below −1.6 °F	Normal	—
Nov 16 – Nov 22Nov 16–Nov 22	Normal +0.7 °F	A bit above +35%	79° / 68°
Nov 23 – Nov 29Nov 23–Nov 29	A bit below −0.9 °F	A bit above +39%	75° / 65°
Nov 30 – Dec 6Nov 30–Dec 6	A bit below −2.2 °F	A bit above +42%	72° / 62°

Coming months

When	TemperatureTemp.	Rain
November	A bit above +1.1 °F	A bit above +20%
December	Normal −0.5 °F	Normal
January	Normal −0.5 °F	Normal
February	A bit below −1.1 °F	A bit above +25%
March	Normal −0.4 °F	Normal

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give. The long-range sea temperature isn't usable at this spot (the model's grid cell falls on land).

Port Isabel climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Port Isabel is from February to May and in November: highs of 70 °F to 85 °F, about 4 rainy days a month and 7 hours of sunshine a day.

Hurricane season: from July to August. In the last 30 years (1996–2025), 10 tropical cyclones passed within 93 mi of Port Isabel, about 3 every 10 years; 6 of them with hurricane-force winds (74 mph or more). The most recent: Harold, in August 2023.

67° 53°

JanJ
70° 56°

FebF
76° 62°

MarM
80° 68°

AprA
85° 73°

MayM
89° 77°

JunJ
91° 78°

JulJ
91° 78°

AugA
88° 75°

SepS
83° 70°

OctO
75° 62°

NovN
69° 55°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	67°	53°	1.68 in	3	4.4	66°	4.1 ft	–
FebruaryFeb	70°	56°	1.20 in	3	5.0	65°	3.8 ft	–
MarchMar	76°	62°	0.82 in	4	5.7	67°	3.9 ft	–
AprilApr	80°	68°	1.12 in	4	6.9	72°	3.8 ft	–
MayMay	85°	73°	2.16 in	6	8.4	77°	3.7 ft	–
JuneJun	89°	77°	2.53 in	7	9.4	82°	3.3 ft	–
JulyJul	91°	78°	2.64 in	5	9.6	82°	2.8 ft	4
AugustAug	91°	78°	1.80 in	7	9.0	83°	2.7 ft	4
SeptemberSep	88°	75°	7.28 in	13	7.2	84°	3.0 ft	2
OctoberOct	83°	70°	3.36 in	7	6.6	81°	3.6 ft	–
NovemberNov	75°	62°	1.87 in	4	5.1	75°	4.1 ft	–
DecemberDec	69°	55°	1.53 in	4	4.2	70°	4.1 ft	–

Month	Water	Waves	Cyclones
Jan	66°	4.1 ft	–
Feb	65°	3.8 ft	–
Mar	67°	3.9 ft	–
Apr	72°	3.8 ft	–
May	77°	3.7 ft	–
Jun	82°	3.3 ft	–
Jul	82°	2.8 ft	4
Aug	83°	2.7 ft	4
Sep	84°	3.0 ft	2
Oct	81°	3.6 ft	–
Nov	75°	4.1 ft	–
Dec	70°	4.1 ft	–

Days: rainy days in the month. Sun: hours a day.

A normal year brings 28.00 in of rain on about 64 days and about 2,500 hours of sunshine.

Cyclones: how many tropical cyclones (tropical storms, hurricanes and typhoons) passed within 93 mi in each month from 1996 to 2025, according to IBTrACS (NOAA).

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now77 °Ffeels like 81 °F

Tomorrow73 / 83 °F

It's 77 °F now (feels like 81 °F). Today, 75 °F to 82 °F; tomorrow, 73 °F to 83 °F.

Chance of rain

Today 19% 0.09 in
Fri 30 11%
Sat 31 7%
Sun 1 3%
Mon 2 0%
Tue 3 22% 0.02 in
Wed 4 22% 0.03 in

Today the chance of rain reaches 19%, with 0.09 in in total. No significant rain expected this week.

Recent rain: last 24 hours, 0.00 in; last 3 days, 0.35 in; last 7 days, 0.76 in.

Humidity and dew point

Humidity82%

Dew point71 °F

Humidity is 82% now and the dew point is 71 °F. With a dew point this high, it feels muggy.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now11 migood

Clouds49%

Visibility is good now (11 mi). No fog expected today.

UV index

Now0

Today's peak7high

Fri 30: 7 · Sat 31: 7 · Sun 1: 7

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising Anglers say fish bite less for a while
→ Steady · now Anglers expect normal activity
↘ Falling Anglers say fish feed more before the change

29.9030.0030.10 29.91

Steady now (−0.03 inHg in 3 hours). Over the next 48 hours: −0.07 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityGood · 46

Saharan dustNo

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Rain	Max wind
Wed 28	Overcast	75 / 84 °F	0	11 mph SE
Tue 27	Drizzle	72 / 80 °F	0.21 in	7 mph E
Mon 26	Drizzle	73 / 82 °F	0.14 in	11 mph ENE
Sun 25	Overcast	77 / 84 °F	0	14 mph ESE
Sat 24	Light drizzle	74 / 83 °F	0.02 in	16 mph ESE
Fri 23	Mainly clear	74 / 83 °F	0	11 mph E
Thu 22	Light showers	73 / 82 °F	0.39 in	10 mph NE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Light drizzle	74 / 83 °F	0.08 in	10 mph NNE
Tue 20	Mainly clear	75 / 82 °F	0	13 mph NNE
Mon 19	Light drizzle	66 / 80 °F	0.07 in	13 mph NNE
Sun 18	Light drizzle	62 / 76 °F	0.05 in	16 mph NNW
Sat 17	Overcast	63 / 70 °F	0	23 mph NNW
Fri 16	Drizzle	71 / 84 °F	0.09 in	24 mph N
Thu 15	Mainly clear	79 / 87 °F	0	12 mph SE
Wed 14	Light drizzle	81 / 88 °F	0.06 in	17 mph SE
Tue 13	Mainly clear	82 / 89 °F	0	17 mph SSE
Mon 12	Light drizzle	81 / 88 °F	0.05 in	15 mph SSE
Sun 11	Light drizzle	80 / 85 °F	0.06 in	14 mph ESE
Sat 10	Light drizzle	79 / 87 °F	0.01 in	11 mph E
Fri 9	Partly cloudy	75 / 86 °F	0	14 mph N
Thu 8	Light drizzle	81 / 88 °F	0.06 in	14 mph NNE
Wed 7	Light showers	77 / 83 °F	0.87 in	14 mph NNE
Tue 6	Light rain	77 / 83 °F	0.58 in	17 mph N
Mon 5	Showers	77 / 80 °F	1.27 in	15 mph N
Sun 4	Light showers	78 / 84 °F	1.09 in	14 mph N
Sat 3	Thunderstorm	78 / 85 °F	1.16 in	15 mph N
Fri 2	Heavy drizzle	77 / 87 °F	0.49 in	11 mph NE
Thu 1	Thunderstorm	83 / 91 °F	0.11 in	16 mph SSE
Wed 30	Light drizzle	84 / 90 °F	0.05 in	15 mph SE
Tue 29	Light drizzle	82 / 90 °F	0.06 in	15 mph SE

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in Port IsabelQuestions

What's the weather like today in Port Isabel?

Light drizzle, from 75 °F to 82 °F, with a gentle breeze from the east-southeast (10 mph) and a 19% chance of rain.

Will it rain tomorrow in Port Isabel?

On Friday 30 the chance of rain is 11% (0.00 in): overcast.

How warm will it be this week?

Between a low of 70 °F and a high of 84 °F; the warmest day, Monday 2.

What's the UV index today?

It reaches 7 (high). Sunscreen, hat and shade between 12 and 4 pm.

Is the pressure rising or falling?

It's 30.04 inHg and steady: −0.00 inHg over the last 24 hours.

When is the best time to visit Port Isabel?

The best time to visit Port Isabel is from February to May and in November: highs of 70 °F to 85 °F, about 4 rainy days a month and 7 hours of sunshine a day.

What is the weather like in Port Isabel in October?

In October, Port Isabel normally sees highs of 83 °F and lows of 70 °F, with about 7 rainy days (3.36 in for the month) and 7 hours of sunshine a day. The sea is around 81 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Port Isabel?

The warmest is August, with average highs of 91 °F, and the coldest January, with lows of 53 °F. The wettest is September (7.28 in) and the driest, March.

When is hurricane season in Port Isabel?

Hurricane season: from July to August. In the last 30 years (1996–2025), 10 tropical cyclones passed within 93 mi of Port Isabel, about 3 every 10 years; 6 of them with hurricane-force winds (74 mph or more). The most recent: Harold, in August 2023.

More about Port Isabel today

Weather near Port Isabel

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 5.7 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 2:42 am (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from