Duncannon — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Duncannon (Leinster, Republic of Ireland). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Duncannon help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Duncannon in the Irish Sea today is 13°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Water temperature in Duncannon rose over the last 30 days but fell over the last week. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Duncannon will be 13.0°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 |
|---|---|---|---|
| JUN 2 | 14.4°C | 13.0°C | |
| JUN 3 | 14.3°C | 12.8°C | |
| JUN 4 | 14.3°C | 13.3°C | |
| JUN 5 | 14.3°C | 13.0°C | |
| JUN 6 | 14.5°C | 12.5°C | |
| JUN 7 | 14.2°C | 13.0°C | |
| JUN 8 | 13.6°C | 13.3°C | |
| JUN 9 | 13.8°C | 12.3°C | |
| JUN 10 | 13.1°C | 12.3°C | 13.1°C |
| JUN 11 | 12.5°C | 13.1°C | |
| JUN 12 | 11.8°C | 13.1°C | |
| JUN 13 | 13.5°C | 13.0°C | |
| JUN 14 | 13.0°C | 13.0°C | |
| JUN 15 | 12.8°C | 13.0°C | |
| JUN 16 | 13.8°C | 13.0°C | |
| JUN 17 | 14.0°C | 13.0°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Duncannon is a coastal village in County Wexford, Leinster, sitting at the mouth of Waterford Harbour with a long sandy strand that attracts day visitors and locals alike. Sea temperatures around Duncannon follow the typical Irish southeast coastal pattern and remain cool for much of the year. In winter (December–February) water temperatures commonly sit around 7–9 °C, rising slowly through spring to roughly 9–13 °C by May. Summer months (June–August) bring the warmest conditions, with sea temperatures most often in the 14–18 °C range at their peak, while autumn (September–November) sees a gradual decline back to about 11–14 °C. These figures are seasonal averages and can vary with weather, tides and offshore currents.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 8°C | 9°C | 11°C |
| February | 7°C | 9°C | 10°C |
| March | 7°C | 9°C | 11°C |
| April | 8°C | 10°C | 11°C |
| May | 9°C | 11°C | 14°C |
| June | 11°C | 13°C | 17°C |
| July | 12°C | 15°C | 19°C |
| August | 13°C | 16°C | 18°C |
| September | 14°C | 16°C | 18°C |
| October | 12°C | 14°C | 16°C |
| November | 11°C | 13°C | 14°C |
| December | 9°C | 11°C | 13°C |
* Click on a month to view detailed water temperature data.
Duncannon: Weather Forecast
June 10
June 11
June 12
Location, Beaches & Local Information
Nearby Beaches & Facilities
Duncannon Beach
Shanacloon Bay Beach
Passage East Beach
Arthurstown Bay Beach
Dollar Bay
Booley Bay
Woodstown Beach
Woodstown Beach
Forenaught Beach
Swimming Conditions
Swimming at Duncannon is a popular activity during the warmer months, but the cool water means even summer bathing benefits many visitors using wetsuits or short dips rather than prolonged immersion. The sandy shoreline and sheltered aspects of the bay make it suitable for family swims when conditions are calm, and it also supports paddle sports and surfing on windier days. Lifeguard cover and supervised bathing are commonly provided during the height of the season, but currents and changing conditions mean swimmers should heed local advice and warnings. For those planning a beach holiday, the village offers easy access to the water, but realistic expectations about water temperature and appropriate clothing will improve comfort and safety.