Upper Hutt – current water temperature and swimming conditions
This page provides information about the current water temperature at Upper Hutt in Wellington Region. Here you can view recent temperature trends on a 30-day chart, check typical monthly water temperature ranges, and compare today’s reading with historical averages for this date. A 7-day water temperature forecast, local weather conditions, and an overview of swimming suitability are also included.
Current Water Temperature
The water temperature in Hutt River at Upper Hutt today is 12°C.
Water Temperature in Hutt River at Upper Hutt: Daily Trends, Historical Records, and Forecast
⚠️ River water between 10 and 15°C is cold but manageable for short swims, especially on sunny days with warm air temperatures. The moving nature of a river can make the water feel colder than the actual reading, particularly in shaded or deeper sections. Casual swimming is usually brief, with wetsuits often preferred. Windy or cool weather can significantly reduce comfort, even when the air temperature is mild.
Water Temperature Over the Last 30 Days
Water temperatures in Upper Hutt have been gradually cooling over the past month, with a further drop recorded during the last week.
According to our forecast, the water temperature in Upper Hutt will be 10.4°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Water Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| May 6 | 12.2°C | 10.2°C | |
| May 7 | 12.2°C | 10.2°C | |
| May 8 | 14.4°C | 10.2°C | |
| May 9 | 14.4°C | 10.2°C | |
| May 10 | 14.5°C | 10.2°C | |
| May 11 | 14.5°C | 10.2°C | |
| May 12 | 14.1°C | 10.2°C | |
| May 13 | 12.7°C | 10.2°C | |
| May 14 | 11.9°C | 10.2°C | 11.9°C |
| May 15 | 10.2°C | 11.7°C | |
| May 16 | 10.2°C | 11.5°C | |
| May 17 | 10.2°C | 11.3°C | |
| May 18 | 10.2°C | 11.1°C | |
| May 19 | 10.2°C | 10.8°C | |
| May 20 | 10.2°C | 10.6°C | |
| May 21 | 10.2°C | 10.4°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual river water temperatures may vary by several degrees from the reported values, particularly after heavy rainfall or periods of changing weather. Rainfall, river flow rates, and runoff from cooler upstream areas can significantly affect water temperature, especially in flowing sections and shaded stretches. Air temperature and cloud cover also play an important role, with warm, sunny conditions helping rivers warm up more quickly. As a result, noticeable temperature differences can occur along the same river.
Our forecast is based on a proprietary mathematical model that takes into account real-time river temperature changes, historical data, seasonal patterns, river flow conditions, recent rainfall, and local air temperature. We also factor in broader weather conditions specific to each region of New Zealand to improve accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Today | Yesterday | A Week Ago |
|---|---|---|---|
| January | 8°C | 13°C | 18°C |
| February | 9°C | 14°C | 19°C |
| March | 7°C | 12°C | 17°C |
| April | 6°C | 10°C | 14°C |
| May | 6°C | 10°C | 13°C |
| June | 4°C | 8°C | 12°C |
| July | 3°C | 7°C | 10°C |
| August | 4°C | 7°C | 10°C |
| September | 4°C | 8°C | 12°C |
| October | 4°C | 8°C | 12°C |
| November | 4°C | 9°C | 14°C |
| December | 7°C | 12°C | 17°C |
Upper Hutt: Weather Forecast
May 15
May 16
May 17
May 18
May 19
May 20
Location & Local Information
Upper Hutt, in the Wellington Region, lies along the middle reaches of the Hutt River as it flows from the Tararua Ranges towards Wellington Harbour. In this section, water temperatures reflect both upland sources and warmer valley conditions. During winter, the river near Upper Hutt is generally cool, averaging around 8–11°C. In spring, temperatures typically rise to between 12 and 16°C as air temperatures increase. Through summer, especially in January and February, calmer stretches and well-known swimming holes can warm to approximately 17–22°C on fine days. By autumn, temperatures usually ease back to around 13–17°C. Periods of heavy rain in the ranges can temporarily lower temperatures and raise river levels.
Swimming Conditions
Swimming is allowed in suitable parts of the Hutt River near Upper Hutt, and it is a popular local activity during warm summer weather. The most comfortable conditions are generally when water temperatures reach or exceed 18°C and flows are steady. However, swimmers should be mindful of moderate currents, deeper pools and shifting gravel beds. After significant rainfall, the river can rise quickly and water clarity may decrease, making swimming less suitable. Choosing recognised swimming spots and checking regional water quality information beforehand helps ensure a safer experience.