Swimming in Cook islands in september 2025 Sea temperature by city in september

Do you want to go to the beach in Cook islands in september 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in september in Cook islands by city and our opinion on the chances of enjoying pleasant sea conditions.

Sea temperature in Cook islands in september 2025

Here, find the average sea temperature in Cook islands in september in several coastal cities.

on average:

77°F

min: 74°F / max: 80°F

on average:

76°F

min: 74°F / max: 80°F

Where should you go swimming in Cook islands in the month of september?

Swimming in Cook islands in september is pleasant

In september in Cook islands swimming conditions are generally the same everywhere.

As for Avarua and Rarotonga island, swimming is pleasant in september. The sea water is 77°F on average (min: 74°F/max: 80°F) so you can easily spend time in the water.

Where to go swimming in Cook islands in september: the map of sea temperatures

ideal swimming pleasant swimming cool swimming cold swimming freezing swimming

Water temperature and seasonal norms in september

Avarua

September
Average sea temperature 77°F
Minimum sea temperature 74°F
Maximum sea temperature 80°F
Average outside temperature 76°F
Maximum outside temperature 76°F
Minimum outside temperature 74°F
Precipitation 3.4in
Number of days of precipitation 4 jour(s)
(14%)
Cloud cover 50%
Our opinion pleasant swimming

More information on swimming in Avarua in september

Rarotonga island

September
Average sea temperature 76°F
Minimum sea temperature 74°F
Maximum sea temperature 80°F
Average outside temperature 76°F
Maximum outside temperature 76°F
Minimum outside temperature 74°F
Precipitation 3.4in
Number of days of precipitation 4 jour(s)
(14%)
Cloud cover 50%
Our opinion pleasant swimming

More information on swimming in Rarotonga island in september

List of coastal cities in Cook islands

Avarua in septemberpleasant swimming
Rarotonga island in septemberpleasant swimming
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