Swimming in Blenheim in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Blenheim in september 2025.
In september, according to seasonal norms, the sea temperature in Blenheim is:
Minimum: 54°F
Average: 56°F
Maximum: 58°F
Other useful seasonal weather averages in september:
- Outside temperature: 41°F to 57°F
- Most common weather: "Clear/Sunny"
- The wind blows at 1.9mph
- It rains a total of 5.6in, over 7 day(s).
Should we swim in Blenheim in september?
No... The water temperature in Blenheim in september is freezing
You won't be able to swim in Blenheim in september! The water temperature is freezing, reaching as low as 54°F (and only 58°F at best)! Our advice: if you are going to Blenheim this month, plan to sightsee and forget the beach!
Note also that in september, the climate is very bad with an average outside temperature of 49°F, 5.6in of precipitation (over 7 days) and 86.97 % humidity.
Water and normal seasonal temperatures in Blenheim in september
| September | |||
| Average sea temperature | 56°F | ||
| Minimum sea temperature | 54°F | ||
| Maximum sea temperature | 58°F | ||
| Average outside temperature | 50°F | ||
| Maximum outside temperature | 58°F | ||
| Minimum outside temperature | 41°F | ||
| Wind speed | 9.9mph | ||
| Wind temperature | 38°F | ||
| Precipitation | 5.6in | ||
| Number of days of rain | 7 jour(s) (23%) | ||
| Humidity | 87% | ||
| Visibility in kilometers | 9.15km | ||
| Cloud cover | 36% | ||
| Our opinion | freezing swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Blenheim
Swim elsewhere in New Zealand in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Auckland in september | 60°F | 61°F | cold swimming | Christchurch in september | 51°F | 53°F | freezing swimming | Dunedin in september | 49°F | 51°F | freezing swimming | Wellington in september | 56°F | 58°F | freezing swimming | Tauranga in september | 60°F | 62°F | cold swimming | Akaroa in september | 51°F | 53°F | freezing swimming | Cathedral Cove in september | 60°F | 62°F | cold swimming | Invercargill in september | 52°F | 54°F | freezing swimming | Napier in september | 57°F | 60°F | freezing swimming | Nelson in september | 56°F | 58°F | freezing swimming | Stewart Island in september | 52°F | 54°F | freezing swimming | Waiheke Island in september | 60°F | 62°F | cold swimming | Greymouth in september | 55°F | 57°F | freezing swimming | New Plymouth in september | 58°F | 59°F | freezing swimming | Picton in september | 56°F | 58°F | freezing swimming | Timaru in september | 51°F | 53°F | freezing swimming |