Lake Ōkataina – current water temperature and swimming conditions

This page provides information about the current water temperature at Lake Ōkataina 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

13.5°C

Today

13.3°C

Yesterday

12.5°C

A Week Ago

The water temperature in Lake Ōkataina today is 14°C.

Water Temperature in Lake Ōkataina: 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

Over the past month, water temperatures in Lake Ōkataina have stayed mostly steady, but a warming trend has developed over the last week.

According to our forecast, the water temperature in Lake Ōkataina will be 11.8°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
Jul 2	13.5°C	11.5°C
Jul 3	12.8°C	11.5°C
Jul 4	12.5°C	11.5°C
Jul 5	12.5°C	11.5°C
Jul 6	12.8°C	11.5°C
Jul 7	12.8°C	11.5°C
Jul 8	13.3°C	11.5°C
Jul 9	13.3°C	11.5°C
Jul 10	13.5°C	11.5°C	13.5°C
Jul 11		11.5°C	13.3°C
Jul 12		11.5°C	13.0°C
Jul 13		11.5°C	12.8°C
Jul 14		11.5°C	12.5°C
Jul 15		11.5°C	12.3°C
Jul 16		11.5°C	12.0°C
Jul 17		11.5°C	11.8°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

Lake Ōkataina: Weather Forecast

July 10

3°C / 11°C

partly cloudy

rain: 6% | wind: 30 km/h

July 11

4°C / 10°C

overcast

rain: 0% | wind: 15 km/h

July 12

1°C / 11°C

overcast

rain: 18% | wind: 5 km/h

July 13

8°C / 12°C

dense intensity drizzle

rain: 71% | wind: 25 km/h

July 14

9°C / 13°C

dense intensity drizzle

rain: 86% | wind: 26 km/h

Location & Local Information

Lake Ōkataina, in the Bay of Plenty Region east of Rotorua, is a deep volcanic lake surrounded by native forest and largely undeveloped shoreline. Its depth and clear freshwater influence water temperatures through the year. In winter, surface temperatures are generally around 10–14°C. During spring, the lake gradually warms to approximately 14–18°C as air temperatures rise. In summer, particularly in January and February, sheltered near-shore areas can reach about 19–23°C on warm, settled days, while deeper water remains noticeably cooler. By autumn, temperatures usually ease back to between 14 and 18°C. Wind can mix the surface layer, especially in more exposed sections.

Swimming Conditions

Swimming is allowed at designated access points around Lake Ōkataina, and it is enjoyed during the warmer months. The most comfortable conditions are typically in mid to late summer when water temperatures approach or exceed 20°C and winds are light. However, the lake is deep and can feel cool away from the shoreline. Swimmers should use recognised access areas and be mindful of boat traffic in popular spots. Checking local water quality information before entering the water helps ensure safe and enjoyable freshwater swimming in this scenic forest setting.

Nearby Lakes

Frequently Asked Questions

What is the current water temperature in Lake Ōkataina?

The water temperature in Lake Ōkataina today is 14°C.

What is the water temperature in Lake Ōkataina during the summer months?

In summer, water temperatures in Lake Ōkataina at Wangi Wangi typically range from 15°C to 25°C.

Is it possible to swim in Lake Ōkataina (Bay of Plenty Region)?

Yes — you can swim in Lake Ōkataina, but it’s a fairly remote, unpatrolled volcanic lake with no facilities, so expect cool water temperatures and variable visibility and take standard open-water precautions. Check current water-quality or algal warnings from the Bay of Plenty Regional Council or DoC before you go, tell someone your plans and consider a lifejacket if you’re arriving by boat.