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 14°C.
Water Temperature in Lake Rotorua at Rotorua: Daily Trends, Historical Records, and Forecast
⚠️ Lake temperatures between 10 and 15°C are cold but can be manageable for short swims on sunny, warm days. Shallow areas may feel slightly warmer, while deeper sections remain cold and slow to warm up. Most swimmers keep sessions brief, and wetsuits are often used for comfort. Wind and cooler air temperatures can quickly reduce how pleasant the swim feels.
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 15.3°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 | 13.6°C | 15.5°C | |
| May 7 | 13.6°C | 15.5°C | |
| May 8 | 16.2°C | 15.5°C | |
| May 9 | 16.2°C | 15.5°C | |
| May 10 | 14.8°C | 15.5°C | |
| May 11 | 14.8°C | 15.5°C | |
| May 12 | 14.6°C | 15.5°C | |
| May 13 | 14.2°C | 15.5°C | |
| May 14 | 13.9°C | 15.5°C | 13.9°C |
| May 15 | 15.5°C | 14.1°C | |
| May 16 | 15.5°C | 14.3°C | |
| May 17 | 15.5°C | 14.5°C | |
| May 18 | 15.5°C | 14.7°C | |
| May 19 | 15.5°C | 14.9°C | |
| May 20 | 15.5°C | 15.1°C | |
| May 21 | 15.5°C | 15.3°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
May 15
May 16
May 17
May 18
May 19
May 20
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.