Lake Ōkareka – current water temperature and swimming conditions

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

13.7°C

Today

13.9°C

Yesterday

15.8°C

A Week Ago

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

Water Temperature in Lake Ōkareka: 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 Lake Ōkareka 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 Lake Ōkareka 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	13.4°C	15.5°C
May 7	13.4°C	15.5°C
May 8	15.8°C	15.5°C
May 9	15.8°C	15.5°C
May 10	14.5°C	15.5°C
May 11	14.5°C	15.5°C
May 12	15.9°C	15.5°C
May 13	13.9°C	15.5°C
May 14	13.7°C	15.5°C	13.7°C
May 15		15.5°C	13.9°C
May 16		15.5°C	14.2°C
May 17		15.5°C	14.4°C
May 18		15.5°C	14.6°C
May 19		15.5°C	14.8°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

Lake Ōkareka: Weather Forecast

May 15

6°C / 14°C

overcast

rain: 0% | wind: 12 km/h

May 16

6°C / 14°C

partly cloudy

rain: 0% | wind: 14 km/h

May 17

7°C / 14°C

overcast

rain: 2% | wind: 14 km/h

May 18

6°C / 15°C

overcast

rain: 2% | wind: 13 km/h

May 19

3°C / 14°C

overcast

rain: 2% | wind: 9 km/h

May 20

4°C / 12°C

overcast

rain: 11% | wind: 6 km/h

Location & Local Information

Lake Ōkareka, in the Bay of Plenty Region near Rotorua, is a clear freshwater lake surrounded by forest and residential areas. Its moderate depth and sheltered setting influence water temperatures throughout 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, near-shore areas can reach about 20–24°C on warm, settled days, while deeper sections remain slightly cooler. By autumn, temperatures usually ease back to between 15 and 19°C. Light winds and calm conditions can help maintain warmer surface temperatures in sheltered bays.

Swimming Conditions

Swimming is allowed at designated access points around Lake Ōkareka, and it is a popular activity during the warmer months. The most comfortable conditions are typically in mid to late summer when water temperatures exceed 20°C and winds are light. Sandy or gently sloping entry points in some areas make access straightforward. However, swimmers should be mindful of boat traffic and occasional seasonal changes in water quality. Checking current water quality information before entering the lake is advisable. In settled summer weather, Lake Ōkareka offers pleasant and accessible freshwater swimming in a scenic setting.

Nearby Lakes

Frequently Asked Questions

What is the current water temperature in Lake Ōkareka?

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

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

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

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

Yes — Lake Ōkareka is commonly used for swimming and can be very pleasant in the summer months when surface temperatures often rise to comfortable levels, though the water can be quite cool outside the peak season. There are no lifeguards, so always swim with a buddy, use marked access points, and check local council or on‑site signage for current water‑quality or algal‑bloom warnings and weather conditions before you go.