Rotorua – current water temperature and swimming conditions
This page provides information about the current water temperature at Rotorua in Bay of Plenty 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 Lake Rotorua at Rotorua today is 10°C.
Water Temperature in Lake Rotorua at Rotorua: Daily Trends, Historical Records, and Forecast
❌ Lake water below 10°C is extremely cold and generally unsuitable for swimming for most people. Even during warm weather, deep lakes retain cold water, making entry uncomfortable and limiting time in the water. Swimming at this temperature is usually limited to quick dips or cold-water enthusiasts. Cool air temperatures or cloudy conditions can make lake swimming particularly harsh.
Water Temperature Over the Last 30 Days
Water temperatures in Rotorua 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 Rotorua will be 12.0°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 |
|---|---|---|---|
| Aug 19 | 13.8°C | 12.3°C | |
| Aug 20 | 13.7°C | 12.3°C | |
| Aug 21 | 13.4°C | 12.3°C | |
| Aug 22 | 13.3°C | 12.3°C | |
| Aug 23 | 13.4°C | 12.3°C | |
| Aug 24 | 13.5°C | 12.3°C | |
| Aug 25 | 9.9°C | 12.3°C | |
| Aug 26 | 9.9°C | 12.3°C | |
| Aug 27 | 9.9°C | 12.3°C | 9.9°C |
| Aug 28 | 12.3°C | 10.2°C | |
| Aug 29 | 12.3°C | 10.5°C | |
| Aug 30 | 12.3°C | 10.8°C | |
| Aug 31 | 12.3°C | 11.1°C | |
| Sep 1 | 12.3°C | 11.4°C | |
| Sep 2 | 12.3°C | 11.7°C | |
| Sep 3 | 12.3°C | 12.0°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual lake water temperatures may differ from the reported values by several degrees, particularly during periods of strong winds or rapid weather changes. Wind can mix surface and deeper layers in a lake, bringing cooler water to the surface, while shallow areas may warm more quickly under direct sunlight. Air temperature, sunshine, and cloud cover strongly influence how quickly a lake heats up or cools down. These factors can lead to noticeable temperature variations across different parts of the lake.
Our forecast is based on a proprietary mathematical model that considers real-time lake temperature observations, historical trends, seasonal cycles, wind strength and direction, and region-specific air temperature. To enhance accuracy, we also incorporate data from nearby monitored locations and comparable lakes within New Zealand.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Today | Yesterday | A Week Ago |
|---|---|---|---|
| January | 16°C | 20°C | 24°C |
| February | 16°C | 21°C | 25°C |
| March | 17°C | 21°C | 24°C |
| April | 15°C | 18°C | 21°C |
| May | 13°C | 16°C | 18°C |
| June | 10°C | 13°C | 16°C |
| July | 9°C | 12°C | 14°C |
| August | 9°C | 12°C | 14°C |
| September | 9°C | 13°C | 16°C |
| October | 10°C | 14°C | 17°C |
| November | 12°C | 16°C | 19°C |
| December | 15°C | 19°C | 23°C |
Rotorua: Weather Forecast
August 28
August 29
August 30
August 31
September 1
Location & Local Information
Rotorua, in the Bay of Plenty Region, sits on the southern shore of Lake Rotorua, a large and relatively shallow lake shaped by volcanic and geothermal activity. Water temperatures in the lake vary through the seasons, influenced by climate and occasional geothermal inflows. In winter, surface temperatures are generally around 10–14°C. During spring, the lake warms gradually to approximately 14–18°C. In summer, particularly in January and February, temperatures commonly reach about 20–24°C, with sheltered areas sometimes feeling slightly warmer on calm, sunny days. In autumn, water temperatures usually settle back to between 15 and 19°C. Wind and rainfall can cause short-term fluctuations.
Swimming Conditions
Swimming is allowed at designated areas around Lake Rotorua, and it can be enjoyable during the warmer months when temperatures exceed 20°C. Mid to late summer typically offers the most comfortable conditions. However, swimmers should be aware that water quality can vary at times due to algal blooms, especially during extended warm and still weather. It is advisable to use recognised swimming sites and check current water quality information before entering the lake. When conditions are suitable, Lake Rotorua provides accessible freshwater swimming close to the township in a distinctive geothermal setting.