Swimming in Tonga in august 2025 Sea temperature by city in august
Do you want to go to the beach in Tonga in august 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 august in Tonga by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Tonga in august 2025
Here, find the average sea temperature in Tonga in august in several coastal cities.
76°F
min: 73°F / max: 78°F
77°F
min: 73°F / max: 80°F
75°F
min: 73°F / max: 78°F
78°F
min: 75°F / max: 81°F
Where should you go swimming in Tonga in the month of august?
Swimming in Tonga in august is pleasant
In august in Tonga swimming conditions are generally the same everywhere.
As for Nukuʻalofa, Haʻapai islands (Lifuka and Foa), Tongatapu Island and Vavaʻu island, swimming is pleasant in august. The sea water is 76°F on average (min: 73°F/max: 78°F) so you can easily spend time in the water.
Where to go swimming in Tonga in august: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in august
Nukuʻalofa
| August | |||
| Average sea temperature | 76°F | ||
| Minimum sea temperature | 73°F | ||
| Maximum sea temperature | 78°F | ||
| Average outside temperature | 74°F | ||
| Maximum outside temperature | 74°F | ||
| Minimum outside temperature | 72°F | ||
| Precipitation | 4.8in | ||
| Number of days of precipitation | 5 jour(s) (15%) | ||
| Cloud cover | 51% | ||
| Our opinion | pleasant swimming |
More information on swimming in Nukuʻalofa in august
Haʻapai islands (Lifuka and Foa)
| August | |||
| Average sea temperature | 77°F | ||
| Minimum sea temperature | 73°F | ||
| Maximum sea temperature | 80°F | ||
| Average outside temperature | 76°F | ||
| Maximum outside temperature | 76°F | ||
| Minimum outside temperature | 74°F | ||
| Precipitation | 4.6in | ||
| Number of days of precipitation | 4 jour(s) (13%) | ||
| Cloud cover | 53% | ||
| Our opinion | pleasant swimming |
More information on swimming in Haʻapai islands (Lifuka / Foa) in august
Tongatapu Island
| August | |||
| Average sea temperature | 75°F | ||
| Minimum sea temperature | 73°F | ||
| Maximum sea temperature | 78°F | ||
| Average outside temperature | 74°F | ||
| Maximum outside temperature | 74°F | ||
| Minimum outside temperature | 72°F | ||
| Precipitation | 4.8in | ||
| Number of days of precipitation | 5 jour(s) (15%) | ||
| Cloud cover | 51% | ||
| Our opinion | pleasant swimming |
More information on swimming in Tongatapu Island in august
Vavaʻu island
| August | |||
| Average sea temperature | 78°F | ||
| Minimum sea temperature | 75°F | ||
| Maximum sea temperature | 81°F | ||
| Average outside temperature | 77°F | ||
| Maximum outside temperature | 77°F | ||
| Minimum outside temperature | 76°F | ||
| Precipitation | 4.3in | ||
| Number of days of precipitation | 5 jour(s) (15%) | ||
| Cloud cover | 55% | ||
| Our opinion | pleasant swimming |
More information on swimming in Vavaʻu island in august
List of coastal cities in Tonga
| Nukuʻalofa in august | pleasant swimming |
| Haʻapai islands (Lifuka and Foa) in august | pleasant swimming |
| Tongatapu Island in august | pleasant swimming |
| Vavaʻu island in august | pleasant swimming |