Water temperature of the Pacific Ocean in september Where to swim in the Pacific Ocean in september 2025?

Several countries border the seaside of the Pacific Ocean, including: Alaska, Australia, Bora Bora, Borneo (Kalimantan), California, Canada, Cebu, Chile, China and Colombia. We measure the water temperature daily in these countries and archive it in order to calculate monthly averages, like those of the month of september.

The seasonal average for the water temperature in the month of september is between 42°F and 88°F. The lowest sea temperature measured this month is 40°F and the highest is 90°F.

The sea temperature map of the Pacific Ocean in september

The map below presents a monthly average of the water temperature of the Pacific Ocean for the month of september for several coastal cities. You can zoom and move around on the map. By clicking on the markers, you can see sea temperature details by city in september.