Port Monmouth water temp
This data the coastal Port Monmouth 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 Monmouth
Water temperature in Port Monmouth today is 71.6°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Port Monmouth was recorded in 2018 and was 77.9°F, and the coldest was recorded in 2017 at 70.2°F. Sea water temperature in Port Monmouth is expected to be constant 71.6°F in the next 10 days. September average water temperature in Port Monmouth is 71.1°F, the minimum temperature is 64.9°F, and the maximum is 78.4°F.
The swimming season in Port Monmouth lasts from July to September. During those months, Port Monmouth water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Port Monmouth in winter reaches 43°F, in spring 48.6°F, in summer the average temperature rises to 71.8°F, and in autumn it is 63.1°F.
Port Monmouth water temperature now
| September 5, 2025 |
|---|
| today temp |
| 71.6°F |
| September 4, 2025 |
|---|
| yesterday temp |
| 71.1°F |
The ocean salinity in Port Monmouth is 26.89‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Port Monmouth 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 Monmouth. 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 Monmouth. Data in table shown for September 5, 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 |
|---|---|---|---|
| 1' 8" | 1' 7" | 1' 5" | 1' 4" |
| 0.52 m | 0.48 m | 0.43 m | 0.4 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 1' 3" | 1' 4" | 1' 9" | 1' 8" |
| 0.38 m | 0.4 m | 0.53 m | 0.51 m |
Surf report in Port Monmouth
Port Monmouth weather forecast
Current temperature and weather
Data in a table show Port Monmouth temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast Port Monmouth.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | |  |  |
| 69.1°F | 68.7°F | 67.8°F | 71.2°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 | | |  |
| 81°F | 83.7°F | 82.9°F | 77.9°F |
You may also be interested in other sections of our site for Port Monmouth: Sunrise and Sunset, Tides
Port Monmouth water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Port Monmouth. 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 Monmouth 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 | 41.9°F | 35.1°F | 48°F | cold |
| Ocean water temperature in Port Monmouth in January | ||||
| February | 39.6°F | 34.9°F | 45.5°F | cold |
| Ocean water temperature in Port Monmouth in February | ||||
| March | 41.5°F | 35.1°F | 50.7°F | cold |
| Ocean water temperature in Port Monmouth in March | ||||
| April | 47.7°F | 40.1°F | 55.4°F | cold |
| Ocean water temperature in Port Monmouth in April | ||||
| May | 56.7°F | 48.4°F | 67.5°F | cold |
| Ocean water temperature in Port Monmouth in May | ||||
| June | 66.7°F | 58.8°F | 76.6°F | cold |
| Ocean water temperature in Port Monmouth in June | ||||
| July | 74.1°F | 67.6°F | 80.8°F | warm |
| Ocean water temperature in Port Monmouth in July | ||||
| August | 74.7°F | 69.3°F | 80.1°F | warm |
| Ocean water temperature in Port Monmouth in August | ||||
| September | 71.1°F | 64.9°F | 78.4°F | warm |
| Ocean water temperature in Port Monmouth in September | ||||
| October | 63.5°F | 56.5°F | 71.8°F | cold |
| Ocean water temperature in Port Monmouth in October | ||||
| November | 54.7°F | 48°F | 62.6°F | cold |
| Ocean water temperature in Port Monmouth in November | ||||
| December | 47.3°F | 39.4°F | 53.4°F | cold |
| Ocean water temperature in Port Monmouth in December | ||||
Chart monthly average water temperature in Port Monmouth
