Wellington – current water temperature and swimming conditions
This page shows the current water temperature at Wellington in Wellington Region. You can view recent sea temperature trends on a 30-day chart, check typical monthly water temperature ranges, and compare today’s reading with historical averages for this date. The page also includes a 7-day water temperature forecast, nearby beaches with similar conditions, local weather information, and a summary of swimming conditions to help you assess how suitable the water is for swimming.
Current Sea Water Temperature
The average sea water temperature today in Wellington is about 16°C.
Water Temperature in Wellington: Daily Trends, Historical Records, and Forecast
⚠️ This is cool water that may feel brisk on entry. Swimming is usually limited to short sessions, and prolonged stays can become uncomfortable without thermal protection. Many swimmers choose a wetsuit, especially for surfing or open-water swimming.
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.
Water Temperature Over the Last 30 Days
While water temperatures in Wellington declined overall during the past month, they have shown a noticeable rebound over the last week.
According to our forecast, Sea water temperature in Wellington will be 15.0°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| Mar 22 | 16.3°C | 15.8°C | |
| Mar 23 | 16.1°C | 15.5°C | |
| Mar 24 | 15.2°C | 15.8°C | |
| Mar 25 | 15.2°C | 15.8°C | |
| Mar 26 | 15.7°C | 16.0°C | |
| Mar 27 | 15.8°C | 15.8°C | |
| Mar 28 | 15.8°C | 16.0°C | |
| Mar 29 | 15.7°C | 16.3°C | |
| Mar 30 | 15.6°C | 16.3°C | 15.6°C |
| Mar 31 | 16.8°C | 15.5°C | |
| Apr 1 | 16.5°C | 15.4°C | |
| Apr 2 | 15.3°C | 15.3°C | |
| Apr 3 | 16.0°C | 15.2°C | |
| Apr 4 | 14.0°C | 15.2°C | |
| Apr 5 | 15.0°C | 15.1°C | |
| Apr 6 | 14.8°C | 15.0°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual near-shore water temperatures in Wellington can vary by several degrees from the values shown, particularly after heavy rain, strong southerlies, or prolonged windy conditions. Certain wind patterns can trigger upwelling, where cooler, deeper water is pushed to the surface and replaces the warmer top layer, leading to noticeable short-term changes in water temperature.
Our water temperature forecast is produced using a proprietary mathematical model that combines real-time measurements with long-term historical patterns, local weather conditions, wind strength and direction, and air temperature specific to each coastal region. To improve accuracy, we cross-check data from nearby locations and use multiple sources, including offshore buoys, satellite-based sea surface maps, and observations provided by local authorities.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Wellington sits at the southern tip of the North Island, bordered by Cook Strait and Wellington Harbour. Sea temperatures here are influenced by strong tidal flows and frequent winds moving through the strait. In winter, from June to August, the water generally ranges between 10–13°C, which feels properly cold and is usually only comfortable for hardy locals or swimmers in wetsuits. Through spring, temperatures gradually lift to around 13–15°C. Summer, from December to March, brings the most pleasant conditions, with water temperatures commonly sitting between 16–19°C during settled periods. Early autumn can still see 15–17°C before the sea cools again heading into winter.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 14°C | 17°C | 20°C |
| February | 15°C | 18°C | 21°C |
| March | 14°C | 17°C | 20°C |
| April | 14°C | 16°C | 19°C |
| May | 13°C | 15°C | 18°C |
| June | 11°C | 14°C | 16°C |
| July | 11°C | 13°C | 16°C |
| August | 10°C | 13°C | 16°C |
| September | 11°C | 13°C | 16°C |
| October | 11°C | 14°C | 16°C |
| November | 12°C | 14°C | 18°C |
| December | 13°C | 15°C | 20°C |
* Click on a month to view detailed water temperature data.
Wellington: Weather Forecast
March 30
March 31
April 1
April 2
Local Water Conditions and Nearby Spots
Swimming Conditions
Swimming is allowed at many of Wellington’s beaches, including Oriental Bay, Scorching Bay and along the south coast. In summer, sheltered spots such as Oriental Bay often provide calmer and slightly warmer conditions, making them popular for families and casual swimmers. The exposed south coast, facing Cook Strait, can experience stronger swells and currents, so conditions there require more care. During the warmer months, the relatively mild water and longer daylight hours make ocean swimming a regular part of city life. Outside summer, cooler temperatures mean most people prefer short dips or wear thermal gear. With the right conditions, Wellington offers clear water and a refreshing urban ocean swim.