Coos Bay water temp
This data the coastal Coos Bay 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 Coos Bay
Water temperature in Coos Bay today is 54.3°F. Based on our historical data over a period of ten years, the warmest water in this day in Coos Bay was recorded in 2019 and was 62.6°F, and the coldest was recorded in 2023 at 51.1°F. Sea water temperature in Coos Bay is expected to rise to 54.9°F in the next 10 days. September average water temperature in Coos Bay is 54.9°F, the minimum temperature is 48.7°F, and the maximum is 62.8°F.
Throughout the year, the water temperature in Coos Bay does not rise above 68°F and therefore is not suitable for comfortable swimming. The average water temperature in Coos Bay in winter reaches 50.5°F, in spring 50.9°F, in summer the average temperature rises to 53.8°F, and in autumn it is 54°F.
Coos Bay water temperature now
| September 20, 2025 |
|---|
| today temp |
| 54.3°F |
| September 19, 2025 |
|---|
| yesterday temp |
| 56.3°F |
The ocean salinity in Coos Bay is 33.16‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Coos Bay 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 Coos Bay. 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 Coos Bay. 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 |
|---|---|---|---|
| 5' 2" | 4' 11" | 4' 8" | 4' 6" |
| 1.58 m | 1.51 m | 1.42 m | 1.36 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 4' 4" | 4' 3" | 4' 4" | 4' 4" |
| 1.32 m | 1.3 m | 1.31 m | 1.32 m |
Surf report in Coos Bay
Coos Bay weather forecast
Current temperature and weather
Data in a table show Coos Bay temperature today (September 20, 2025). For more information and forecast for a few days, go to the weather forecast Coos Bay.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | | |
| 54.9°F | 53.8°F | 53.4°F | 54°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
|  | | |
| 56.7°F | 58.5°F | 56.8°F | 54.3°F |
You may also be interested in other sections of our site for Coos Bay: Sunrise and Sunset, Tides
Coos Bay water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Coos Bay. 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 Coos Bay 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 | 50.4°F | 46.8°F | 55.4°F | cold |
| Ocean water temperature in Coos Bay in January | ||||
| February | 50°F | 47.5°F | 54.9°F | cold |
| Ocean water temperature in Coos Bay in February | ||||
| March | 50°F | 47.1°F | 54.3°F | cold |
| Ocean water temperature in Coos Bay in March | ||||
| April | 50.7°F | 46.6°F | 55.8°F | cold |
| Ocean water temperature in Coos Bay in April | ||||
| May | 52.2°F | 47.8°F | 55.9°F | cold |
| Ocean water temperature in Coos Bay in May | ||||
| June | 53.2°F | 46.9°F | 59.7°F | cold |
| Ocean water temperature in Coos Bay in June | ||||
| July | 53.4°F | 46.6°F | 59.7°F | cold |
| Ocean water temperature in Coos Bay in July | ||||
| August | 54.5°F | 48.7°F | 60.3°F | cold |
| Ocean water temperature in Coos Bay in August | ||||
| September | 54.9°F | 48.7°F | 62.8°F | cold |
| Ocean water temperature in Coos Bay in September | ||||
| October | 54.1°F | 47.3°F | 61.2°F | cold |
| Ocean water temperature in Coos Bay in October | ||||
| November | 53.1°F | 48°F | 59°F | cold |
| Ocean water temperature in Coos Bay in November | ||||
| December | 51.3°F | 47.3°F | 56.5°F | cold |
| Ocean water temperature in Coos Bay in December | ||||
Chart monthly average water temperature in Coos Bay
