Letterfrack — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Letterfrack (Connacht, 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 Letterfrack help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Letterfrack in the Atlantic Ocean 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 Letterfrack 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 Letterfrack will be 12.9°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 | 13.4°C | 13.0°C | |
| JUN 3 | 13.3°C | 13.0°C | |
| JUN 4 | 13.3°C | 12.5°C | |
| JUN 5 | 13.3°C | 13.0°C | |
| JUN 6 | 13.3°C | 13.0°C | |
| JUN 7 | 13.4°C | 13.0°C | |
| JUN 8 | 13.2°C | 13.0°C | |
| JUN 9 | 13.1°C | 12.3°C | |
| JUN 10 | 13.0°C | 12.3°C | 13.0°C |
| JUN 11 | 13.0°C | 13.0°C | |
| JUN 12 | 12.8°C | 13.0°C | |
| JUN 13 | 13.0°C | 12.9°C | |
| JUN 14 | 13.3°C | 12.9°C | |
| JUN 15 | 13.0°C | 12.9°C | |
| JUN 16 | 13.0°C | 12.9°C | |
| JUN 17 | 13.0°C | 12.9°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
Letterfrack sits on the Connemara coast in the west of the Republic of Ireland and is surrounded by a mix of open Atlantic shoreline, sea lochs and sheltered bays. Water temperatures here remain cool year‑round, reflecting the Atlantic influence. Typical winter sea temperatures (December–February) are around 8–10 °C, while early spring (March–May) tends to rise slowly into the range of about 9–12 °C. In summer months (June–August) coastal waters commonly reach roughly 13–16 °C, with the warmest, most sheltered spots occasionally touching 17 °C on calmer days. Autumn (September–November) sees a gradual cooling back to roughly 12–14 °C as storms and cooling air temperatures return.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 7°C | 10°C | 12°C |
| February | 7°C | 9°C | 11°C |
| March | 7°C | 9°C | 11°C |
| April | 8°C | 10°C | 12°C |
| May | 10°C | 12°C | 14°C |
| June | 11°C | 14°C | 17°C |
| July | 12°C | 15°C | 20°C |
| August | 14°C | 16°C | 18°C |
| September | 13°C | 15°C | 18°C |
| October | 12°C | 14°C | 16°C |
| November | 10°C | 12°C | 15°C |
| December | 9°C | 10°C | 13°C |
* Click on a month to view detailed water temperature data.
Letterfrack: Weather Forecast
June 10
June 11
June 12
Location, Beaches & Local Information
Nearby Beaches & Facilities
Renvyle
Renvyle Beach
Keel Beach
Lettergesh Beach
Glassillaun Beach
Glassillaun Bay Beach
Cleggan Beach
Swimming Conditions
Swimming around Letterfrack is primarily a wild‑water experience, with options ranging from short sandy coves and rock‑fringed bays to deeper, calmer inlets suited to more sheltered dipping. The relatively cool summer temperatures make open‑water swims refreshing but brisk for unprotected swimmers, so many visitors use wetsuits or join guided swims or kayaking excursions to make the most of the season. Beaches and shoreline spots offer scenic day‑trip and beach‑holiday possibilities rather than traditional sunbathing resorts, and conditions can change quickly with tides and weather. There are few staffed lifeguard beaches in this remote area, so swimmers should check local advice, be cautious of currents and sudden depth changes, and plan activities in calmer weather or with experienced local operators.