Swimming in Stewart Island in august 2025: Average sea temperature in august and tide times in august 2025
Average sea temperature in Stewart Island in august 2025.
In august, according to seasonal norms, the sea temperature in Stewart Island is:
Minimum: 51°F
Average: 52°F
Maximum: 53°F
Other useful seasonal weather averages in august:
- Outside temperature: 43°F to 52°F
- Most common weather: "Clear/Sunny"
- The wind blows at 1.9mph
- It rains a total of 4.2in, over 7 day(s).
Should we swim in Stewart Island in august?
No... The water temperature in Stewart Island in august is freezing
You won't be able to swim in Stewart Island in august! The water temperature is freezing, reaching as low as 51°F (and only 53°F at best)! Our advice: if you are going to Stewart Island this month, plan to sightsee and forget the beach!
Note also that in august, the climate is bad with an average outside temperature of 47°F, 4.1in of precipitation (over 7 days) and 86.95 % humidity.
Water and normal seasonal temperatures in Stewart Island in august
| August | |||
| Average sea temperature | 52°F | ||
| Minimum sea temperature | 51°F | ||
| Maximum sea temperature | 53°F | ||
| Average outside temperature | 49°F | ||
| Maximum outside temperature | 52°F | ||
| Minimum outside temperature | 43°F | ||
| Wind speed | 13.1mph | ||
| Wind temperature | 38°F | ||
| Precipitation | 4.2in | ||
| Number of days of rain | 7 jour(s) (24%) | ||
| Humidity | 87% | ||
| Visibility in kilometers | 9.08km | ||
| Cloud cover | 52% | ||
| Our opinion | freezing swimming |
Chart of the tides in august 2025
Tide times in august 2025 in Stewart Island
Swim elsewhere in New Zealand in august
| City | Average T° | Min. T° | Max. T° | Our opinion | Auckland in august | 59°F | 60°F | freezing swimming | Christchurch in august | 50°F | 51°F | freezing swimming | Dunedin in august | 49°F | 50°F | freezing swimming | Wellington in august | 54°F | 57°F | freezing swimming | Tauranga in august | 59°F | 61°F | cold swimming | Akaroa in august | 49°F | 51°F | freezing swimming | Cathedral Cove in august | 60°F | 61°F | cold swimming | Invercargill in august | 52°F | 53°F | freezing swimming | Napier in august | 57°F | 59°F | freezing swimming | Nelson in august | 55°F | 56°F | freezing swimming | Waiheke Island in august | 59°F | 60°F | freezing swimming | Blenheim in august | 55°F | 56°F | freezing swimming | Greymouth in august | 55°F | 56°F | freezing swimming | New Plymouth in august | 56°F | 58°F | freezing swimming | Picton in august | 55°F | 56°F | freezing swimming | Timaru in august | 50°F | 52°F | freezing swimming |