Port Arthur (TX) water temp
This data the coastal Port Arthur ocean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.
Current ocean temperature in Port Arthur
Water temperature in Port Arthur today is 86.4°F. Based on our historical data over a period of ten years, the warmest water in this day in the Gulf of Mexico near Port Arthur was, like today, 86.4°F, and the coldest was recorded in 2008 at 79°F. Sea water temperature in Port Arthur is expected to drop to 81.5°F in the next 10 days. September average water temperature in Port Arthur is 83.5°F, the minimum temperature is 78.4°F, and the maximum is 88.2°F.
The swimming season in Port Arthur lasts from April to November. During those months, Port Arthur water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Port Arthur in winter reaches 59.7°F, in spring 71.1°F, in summer the average temperature rises to 85.5°F, and in autumn it is 76.6°F.
Port Arthur water temperature now
| September 20, 2025 |
|---|
| today temp |
| 86.4°F |
| September 19, 2025 |
|---|
| yesterday temp |
| 85.3°F |
The ocean salinity in Port Arthur is 21.99‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Port Arthur for today
Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Port Arthur. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Port Arthur. Data in table shown for September 20, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
| 0' 5" | 0' 5" | 0' 5" | 0' 5" |
| 0.13 m | 0.12 m | 0.12 m | 0.12 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 0' 4" | 0' 4" | 0' 5" | 0' 6" |
| 0.11 m | 0.11 m | 0.12 m | 0.16 m |
Surf report in Port Arthur
Port Arthur weather forecast
Current temperature and weather
Data in a table show Port Arthur temperature today (September 20, 2025). For more information and forecast for a few days, go to the weather forecast Port Arthur.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | |  | |
| 79.7°F | 78.1°F | 76.5°F | 80.6°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
|  | | |
| 86.9°F | 90.7°F | 85.1°F | 81.1°F |
You may also be interested in other sections of our site for Port Arthur: Sunrise and Sunset, Tides
Port Arthur water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Port Arthur. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Port Arthur on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve
| Month | Avr | Min | Max | |
|---|---|---|---|---|
| January | 57.7°F | 51.1°F | 69.3°F | cold |
| Ocean water temperature in Port Arthur in January | ||||
| February | 59.2°F | 51.4°F | 68.5°F | cold |
| Ocean water temperature in Port Arthur in February | ||||
| March | 64.6°F | 57°F | 74.5°F | cold |
| Ocean water temperature in Port Arthur in March | ||||
| April | 70.9°F | 63.3°F | 80.2°F | warm |
| Ocean water temperature in Port Arthur in April | ||||
| May | 77.9°F | 70.2°F | 84.4°F | hot |
| Ocean water temperature in Port Arthur in May | ||||
| June | 84°F | 78.3°F | 88.7°F | hot |
| Ocean water temperature in Port Arthur in June | ||||
| July | 85.8°F | 82.4°F | 90°F | hot |
| Ocean water temperature in Port Arthur in July | ||||
| August | 86.5°F | 82.9°F | 90.3°F | hot |
| Ocean water temperature in Port Arthur in August | ||||
| September | 83.5°F | 78.4°F | 88.2°F | hot |
| Ocean water temperature in Port Arthur in September | ||||
| October | 77.2°F | 69.4°F | 85.3°F | hot |
| Ocean water temperature in Port Arthur in October | ||||
| November | 69.1°F | 61.9°F | 78.3°F | warm |
| Ocean water temperature in Port Arthur in November | ||||
| December | 62.1°F | 53.2°F | 69.4°F | cold |
| Ocean water temperature in Port Arthur in December | ||||
Chart monthly average water temperature in Port Arthur
