Bangor — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Bangor (Northen Ireland, United Kingdom). 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 Bangor help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Bangor in the Irish Sea today is 12°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 50°F (10°C) to 54°F (12°C). The water is slightly warmer, but still cool for most people. Swimming in such conditions is possible, but for most people, the time spent in the water should be limited to avoid hypothermia. Even experienced swimmers may feel discomfort if they stay in the water for too long. To improve comfort and safety, a wetsuit can be used.
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 Bangor has risen over the last week and month. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Bangor will be 12.1°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 6 | 11.8°C | 11.3°C | |
| JUN 7 | 11.7°C | 11.0°C | |
| JUN 8 | 11.7°C | 11.0°C | |
| JUN 9 | 11.6°C | 11.5°C | |
| JUN 10 | 11.5°C | 11.8°C | |
| JUN 11 | 11.8°C | 11.8°C | |
| JUN 12 | 11.8°C | 11.8°C | |
| JUN 13 | 12.1°C | 12.0°C | |
| JUN 14 | 11.9°C | 12.0°C | 11.9°C |
| JUN 15 | 11.8°C | 11.9°C | |
| JUN 16 | 12.0°C | 12.0°C | |
| JUN 17 | 12.5°C | 12.0°C | |
| JUN 18 | 12.3°C | 12.0°C | |
| JUN 19 | 12.3°C | 12.1°C | |
| JUN 20 | 12.5°C | 12.1°C | |
| JUN 21 | 12.8°C | 12.1°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
Bangor is a compact coastal town on the southern shore of Belfast Lough in Northern Ireland, with a maritime climate that keeps sea temperatures relatively cool year-round. Water temperatures typically range from about 7–9 °C in the coldest months of winter (December to February), rise slowly in spring to around 8–12 °C (March to May), reach their warmest in midsummer at roughly 14–17 °C (June to August), and then fall back through autumn to about 10–13 °C (September to November). These averages reflect the influence of the Irish Sea and local tides, so short-term conditions can vary with wind, weather patterns and tidal flows; surface water can warm faster on sunny, sheltered days and feel colder on overcast or windy days.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 7°C | 9°C | 10°C |
| February | 7°C | 8°C | 10°C |
| March | 6°C | 8°C | 10°C |
| April | 7°C | 8°C | 10°C |
| May | 8°C | 10°C | 11°C |
| June | 9°C | 12°C | 14°C |
| July | 11°C | 14°C | 16°C |
| August | 12°C | 14°C | 16°C |
| September | 12°C | 14°C | 16°C |
| October | 12°C | 14°C | 15°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.
Bangor: Weather Forecast
June 15
June 16
June 17
June 18
Location, Beaches & Local Information
Nearby Beaches & Facilities
North Down Coastal Path
Bangor Bay Beach
Smelt Mill Bay
Jenny Watt's Cove
Ballymacormick Carpark
Carnalea Bay Beach
Ballyholme Beach
Ballymacormick Point
Helens Beach
Swimming Conditions
Swimming and beach holidays in Bangor are oriented toward those who expect cooler water temperatures and variable sea conditions. Summer offers the most comfortable open-water swimming for short swims and family paddling when waters are in the mid-teens Celsius, but many visitors and locals use wetsuits for longer swims even then. The lough’s sheltered areas provide calmer water than exposed open-coast sites, making them suitable for beginner and club swimmers when conditions are benign, while slipways, promenades and nearby amenities support day visits. Cold-water swimmers regularly take to the water outside summer, but anyone planning to swim should check local conditions, be prepared for rapid weather changes, be aware of tides and currents, and consider wearing thermal protection or swimming with a group for safety.