Glengarriff — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Glengarriff (Munster, 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 Glengarriff help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Glengarriff in the Celtic Sea today is 18°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people.
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 Glengarriff has fallen over the last month but risen over the last 7 days. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Glengarriff will be 16.2°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 |
|---|---|---|---|
| AUG 25 | 17.0°C | 16.5°C | |
| AUG 26 | 17.1°C | 16.5°C | |
| AUG 27 | 17.2°C | 16.5°C | |
| AUG 28 | 17.2°C | 16.5°C | |
| AUG 29 | 17.2°C | 16.5°C | |
| AUG 30 | 17.2°C | 16.8°C | |
| AUG 31 | 18.0°C | 16.8°C | |
| SEP 1 | 18.0°C | 16.5°C | |
| SEP 2 | 17.6°C | 16.8°C | 17.6°C |
| SEP 3 | 16.0°C | 17.4°C | |
| SEP 4 | 15.0°C | 17.2°C | |
| SEP 5 | 16.0°C | 17.0°C | |
| SEP 6 | 16.0°C | 16.8°C | |
| SEP 7 | 15.3°C | 16.6°C | |
| SEP 8 | 15.8°C | 16.4°C | |
| SEP 9 | 15.3°C | 16.2°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
Glengarriff, situated on Bantry Bay in County Cork in the province of Munster, benefits from a maritime climate that keeps water temperatures milder than many inland Irish waters. Because the harbour is relatively sheltered and influenced by the North Atlantic currents, typical sea temperature patterns are moderate through the year. Seasonal ranges commonly seen in and around Glengarriff are roughly 7–10 °C in winter, 8–13 °C in spring, 12–17 °C in summer and 10–14 °C in autumn. Local variations occur with wind, tides and occasional warm summers, so temperatures can be a degree or two higher or lower on any given day.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 8°C | 10°C | 12°C |
| February | 8°C | 9°C | 11°C |
| March | 8°C | 9°C | 11°C |
| April | 8°C | 10°C | 12°C |
| May | 10°C | 12°C | 14°C |
| June | 11°C | 14°C | 18°C |
| July | 12°C | 15°C | 20°C |
| August | 13°C | 16°C | 19°C |
| September | 13°C | 15°C | 18°C |
| October | 12°C | 14°C | 16°C |
| November | 10°C | 12°C | 14°C |
| December | 9°C | 10°C | 13°C |
* Click on a month to view detailed water temperature data.
Glengarriff: Weather Forecast
September 3
September 4
September 5
September 6
Location, Beaches & Local Information
Nearby Beaches & Facilities
Shanvalla Bay Beach
Beach Beach
Abbey Beach
Lower Newtown Bay Beach
Swimming Conditions
Swimming opportunities around Glengarriff suit a mix of tastes, from short wild swims in sheltered inlets to longer open-water sessions for experienced swimmers. The harbour’s calm coves and rocky inlets make for more comfortable and protected swimming, while exposed bay areas can be colder and more changeable. Summer months offer the warmest water, making brief swims and paddling more pleasant without heavy thermal protection, but even then a wetsuit is commonly used for longer sessions or for less tolerance to cold. Visitors planning a beach-style holiday should expect small beaches and pebble shores rather than wide sand expanses, and should always check local weather, tides and water clarity before entering the sea. Lifeguard coverage is limited, so sensible precautions and appropriate gear are advised.