Bay of Plenty Region – Water Temperature Overview
Bay of Plenty Region features a coastline as well as numerous rivers and inland lakes. Water temperatures vary significantly by season and location, influencing swimming conditions across coastal and inland areas.
Current Sea Water Temperature
It’s important to note that these swimming tips and recommendations apply only in settled weather. When air temperatures drop below 20°C — and sometimes even below 25°C — swimming can feel uncomfortable, even when water temperatures are relatively high.
Sea Temperature Trends
Over the past month, the sea water temperature has remained largely unchanged. Overall, the sea water temperature is within the range expected based on historical data for this month.
Water Temperature and Swimming Conditions by Month
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 18°C | 21°C | 24°C |
| February | 19°C | 22°C | 24°C |
| March | 18°C | 21°C | 23°C |
| April | 17°C | 20°C | 22°C |
| May | 15°C | 18°C | 21°C |
| June | 14°C | 16°C | 18°C |
| July | 13°C | 15°C | 17°C |
| August | 12°C | 14°C | 16°C |
| September | 12°C | 15°C | 17°C |
| October | 12°C | 15°C | 17°C |
| November | 14°C | 17°C | 19°C |
| December | 16°C | 19°C | 22°C |
Most Viewed Sea Places in the Bay of Plenty Region
Current Water Temperature in Lakes and Rivers
About the Region & Location Map
The Bay of Plenty Region is well known for its sunny climate and inviting coastline along the Pacific Ocean. Over summer, from December through February, coastal water temperatures usually range between 19°C and 23°C, with late summer often feeling especially pleasant for swimming. Even into early autumn, the sea can remain comfortable for a dip. During winter, temperatures typically ease back to around 15°C to 17°C, which is still relatively mild compared with many other parts of the country. Swimming is allowed at most beaches, and the region’s long stretches of sandy shore are popular for families, although open beaches can experience surf and rips, so it’s safest to swim in patrolled areas.
Further inland, the Bay of Plenty’s lakes and rivers respond quickly to seasonal changes. In summer, lakes can warm to 20°C to 24°C during settled weather, making them ideal for swimming, kayaking and other water activities. Rivers generally range from 17°C to 21°C, depending on rainfall and flow conditions. In winter, freshwater temperatures commonly drop to between 10°C and 15°C, which can feel brisk but manageable for short swims. Swimming is generally permitted in many freshwater spots, provided water quality is suitable and there are no health warnings after heavy rain, as runoff can temporarily affect conditions.