Sea weather in Letterkenny in Ireland All the beach weather in Letterkenny
All the essential weather information for enjoying the beach in Letterkenny in Ireland, for swimming, tanning or water sports! Our sea weather data is reliable, easy to read and updated every day.
Weather: When should you go to the beach in Letterkenny over the next 7 days?
Discover the best moment to go to the beach in Letterkenny in Ireland this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Letterkenny. You can see full forecasts by clicking on the day you want to see in the table below.
| Date | Outside temp. | Max wind | Our opinion | Details |
|---|---|---|---|---|
| Sunday 14 December 2025 | 47°F to 56°F | 17.4mph | not recommended | all the sea weather |
| Monday 15 December 2025 | 43°F to 49°F | 10.6mph | discouraged | all the sea weather |
| Tuesday 16 December 2025 | 36°F to 45°F | 11.8mph | discouraged | all the sea weather |
| Wednesday 17 December 2025 | 41°F to 50°F | 14.3mph | not recommended | all the sea weather |
| Thursday 18 December 2025 | 45°F to 54°F | 36mph | not recommended | all the sea weather |
| Friday 19 December 2025 | 45°F to 49°F | 16.8mph | not recommended | all the sea weather |
| Saturday 20 December 2025 | 41°F to 47°F | 21.1mph | discouraged | all the sea weather |
Sea Weather: Your daily and hourly sea weather in Letterkenny
Sea weather on Sunday 14 December 2025
On Sunday 14 December 2025, the sun will rise at 08:48 and will set at 16:02 on the beach(es) of Letterkenny. The outside temperature will be a high of 56°F t and a low of 47°F. Precipitation is in the forecast (0.1in throughout the day): choose the right time to go to the beach and dodge the raindrops. Be careful, the sea will be generally rough with a wind speed of up to 28.6mph km/h (with gusts up to 28.6mph). Wave height will be up to 10.2ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition |  |  |  |  |  | | | |
| Outside temperature | 12°C (54°F) | 12°C (53°F) | 12°C (53°F) | 12°C (54°F) | 12°C (54°F) | 13°C (55°F) | 8°C (47°F) | 8°C (47°F) |
| Perceived temperature | 9°C (48°F) | 10°C (49°F) | 10°C (49°F) | 9°C (49°F) | 9°C (48°F) | 10°C (50°F) | 4°C (38°F) | 5°C (40°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0.1in | 0in | 0in | 0in |
| Humidity | 87% | 90% | 90% | 90% | 88% | 85% | 86% | 78% |
| Barometric pressure | 1005 hPa | 1004 hPa | 1002 hPa | 1000 hPa | 995 hPa | 992 hPa | 995 hPa | 997 hPa |
| Cloud cover | 100% | 100% | 100% | 100% | 100% | 98% | 100% | 100% |
| Heat index | 12°C (54°F) | 12°C (53°F) | 12°C (53°F) | 12°C (54°F) | 12°C (54°F) | 13°C (55°F) | 8°C (47°F) | 8°C (47°F) |
| Dew point | 10°C (50°F) | 10°C (50°F) | 10°C (51°F) | 10°C (51°F) | 10°C (51°F) | 10°C (51°F) | 6°C (43°F) | 5°C (41°F) |
| Wind | ||||||||
| Speed | 33km/h (20mph) | 19km/h (12mph) | 23km/h (14mph) | 27km/h (17mph) | 46km/h (28mph) | 38km/h (23mph) | 41km/h (26mph) | 28km/h (17mph) |
| Gusts | 33km/h (21mph) | 32km/h (20mph) | 39km/h (24mph) | 44km/h (27mph) | 46km/h (29mph) | 45km/h (28mph) | 44km/h (27mph) | 39km/h (24mph) |
| Direction | 207° SSW | 181° S | 171° S | 168° SSE | 180° S | 189° S | 294° WNW | 262° W |
| Wind chill | 9°C (48°F) | 10°C (49°F) | 10°C (49°F) | 9°C (49°F) | 9°C (48°F) | 10°C (50°F) | 4°C (38°F) | 5°C (40°F) |
| Waves | ||||||||
| Height | 3.1m (10.2ft) | 2.7m (8.9ft) | 2.6m (8.6ft) | 2.5m (8.3ft) | 2.4m (7.8ft) | 2.3m (7.4ft) | 2.3m (7.5ft) | 2.6m (8.5ft) |
| Direction | 295° WNW | 294° WNW | 293° WNW | 292° WNW | 292° WNW | 292° WNW | 292° WNW | 292° WNW |
| Period | 13.3 sec. | 13.1 sec. | 12.8 sec. | 12.8 sec. | 13.1 sec. | 13.2 sec. | 13.2 sec. | 13.0 sec. |
| Significant height | 0.8m (2.6ft) | 0.9m (3ft) | 0.6m (2ft) | 0.6m (2ft) | 0.6m (2ft) | 0.8m (2.6ft) | 0.8m (2.6ft) | 1.1m (3.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) | 9°C (48°F) |
Sea weather on Monday 15 December 2025
On Monday 15 December 2025, the sun will rise at 08:49 and will set at 16:02 on the beach(es) of Letterkenny. The outside temperature will be a high of 49°F t and a low of 43°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 13.1mph km/h (with gusts up to 18mph). Wave height will be up to 10.5ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | |  | | | | |
| Outside temperature | 9°C (48°F) | 8°C (46°F) | 7°C (45°F) | 7°C (44°F) | 7°C (44°F) | 7°C (45°F) | 6°C (43°F) | 7°C (44°F) |
| Perceived temperature | 6°C (43°F) | 5°C (40°F) | 4°C (40°F) | 3°C (38°F) | 4°C (39°F) | 4°C (40°F) | 3°C (37°F) | 4°C (38°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 72% | 78% | 78% | 83% | 81% | 79% | 83% | 81% |
| Barometric pressure | 998 hPa | 999 hPa | 999 hPa | 1000 hPa | 1001 hPa | 1001 hPa | 1003 hPa | 1005 hPa |
| Cloud cover | 41% | 37% | 45% | 35% | 47% | 54% | 31% | 87% |
| Heat index | 9°C (48°F) | 8°C (46°F) | 7°C (45°F) | 7°C (44°F) | 7°C (44°F) | 7°C (45°F) | 6°C (43°F) | 7°C (44°F) |
| Dew point | 4°C (39°F) | 4°C (40°F) | 4°C (39°F) | 4°C (39°F) | 4°C (39°F) | 4°C (39°F) | 4°C (38°F) | 4°C (39°F) |
| Wind | ||||||||
| Speed | 21km/h (13mph) | 19km/h (12mph) | 18km/h (11mph) | 17km/h (11mph) | 17km/h (11mph) | 17km/h (11mph) | 16km/h (10mph) | 17km/h (11mph) |
| Gusts | 29km/h (18mph) | 29km/h (18mph) | 27km/h (17mph) | 26km/h (16mph) | 26km/h (16mph) | 27km/h (17mph) | 27km/h (17mph) | 27km/h (17mph) |
| Direction | 241° WSW | 223° SW | 204° SSW | 183° S | 200° SSW | 211° SSW | 202° SSW | 216° SW |
| Wind chill | 6°C (43°F) | 5°C (40°F) | 4°C (40°F) | 3°C (38°F) | 4°C (39°F) | 4°C (40°F) | 3°C (37°F) | 4°C (38°F) |
| Waves | ||||||||
| Height | 2.6m (8.5ft) | 2.5m (8.2ft) | 2.4m (7.8ft) | 2.5m (8.2ft) | 2.9m (9.4ft) | 3.2m (10.5ft) | 3.2m (10.7ft) | 3.1m (10.2ft) |
| Direction | 294° WNW | 294° WNW | 294° WNW | 295° WNW | 301° WNW | 304° NW | 305° NW | 305° NW |
| Period | 12.9 sec. | 13.1 sec. | 13.2 sec. | 13.1 sec. | 15.1 sec. | 16.1 sec. | 15.8 sec. | 15.5 sec. |
| Significant height | 0.9m (3ft) | 0.6m (2ft) | 0.6m (2ft) | 0.6m (2ft) | 0.5m (1.6ft) | 0.4m (1.3ft) | 0.4m (1.3ft) | 0.5m (1.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) |
Sea weather on Tuesday 16 December 2025
On Tuesday 16 December 2025, the sun will rise at 08:50 and will set at 16:02 on the beach(es) of Letterkenny. The outside temperature will be a high of 45°F t and a low of 36°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 11.8mph km/h (with gusts up to 20.5mph). Wave height will be up to 9.8ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | |  | | | |
| Outside temperature | 7°C (45°F) | 6°C (43°F) | 6°C (42°F) | 5°C (42°F) | 4°C (39°F) | 4°C (38°F) | 2°C (35°F) | 5°C (40°F) |
| Perceived temperature | 4°C (39°F) | 3°C (37°F) | 2°C (36°F) | 2°C (35°F) | -0°C (32°F) | -0°C (31°F) | -3°C (27°F) | 1°C (33°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 76% | 79% | 83% | 85% | 83% | 80% | 84% | 84% |
| Barometric pressure | 1006 hPa | 1007 hPa | 1009 hPa | 1011 hPa | 1012 hPa | 1013 hPa | 1014 hPa | 1013 hPa |
| Cloud cover | 7% | 73% | 70% | 7% | 0% | 0% | 1% | 11% |
| Heat index | 7°C (45°F) | 6°C (43°F) | 6°C (42°F) | 5°C (42°F) | 4°C (39°F) | 4°C (38°F) | 2°C (35°F) | 5°C (40°F) |
| Dew point | 3°C (38°F) | 3°C (37°F) | 3°C (38°F) | 3°C (37°F) | 1°C (34°F) | 0°C (33°F) | -1°C (30°F) | 2°C (36°F) |
| Wind | ||||||||
| Speed | 15km/h (10mph) | 17km/h (11mph) | 19km/h (12mph) | 18km/h (11mph) | 19km/h (12mph) | 18km/h (11mph) | 17km/h (11mph) | 19km/h (12mph) |
| Gusts | 25km/h (15mph) | 28km/h (17mph) | 30km/h (19mph) | 28km/h (17mph) | 21km/h (13mph) | 23km/h (14mph) | 22km/h (14mph) | 33km/h (21mph) |
| Direction | 214° SW | 202° SSW | 202° SSW | 191° S | 196° SSW | 196° SSW | 180° S | 166° SSE |
| Wind chill | 4°C (39°F) | 3°C (37°F) | 2°C (36°F) | 2°C (35°F) | -0°C (32°F) | -0°C (31°F) | -3°C (27°F) | 1°C (33°F) |
| Waves | ||||||||
| Height | 3.0m (9.8ft) | 2.9m (9.5ft) | 2.8m (9.2ft) | 2.7m (8.8ft) | 2.6m (8.5ft) | 2.5m (8.3ft) | 2.5m (8.1ft) | 2.5m (8.1ft) |
| Direction | 303° WNW | 301° WNW | 301° WNW | 300° WNW | 300° WNW | 300° WNW | 301° WNW | 303° WNW |
| Period | 14.9 sec. | 14.8 sec. | 14.7 sec. | 14.5 sec. | 14.4 sec. | 14.3 sec. | 14.2 sec. | 14.1 sec. |
| Significant height | 0.6m (2ft) | 0.5m (1.6ft) | 0.7m (2.3ft) | 0.7m (2.3ft) | 0.8m (2.6ft) | 0.8m (2.6ft) | 0.7m (2.3ft) | 0.8m (2.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) |
Sea weather on Wednesday 17 December 2025
On Wednesday 17 December 2025, the sun will rise at 08:51 and will set at 16:02 on the beach(es) of Letterkenny. The outside temperature will be a high of 50°F t and a low of 41°F. Precipitation is in the forecast (0.1in throughout the day): choose the right time to go to the beach and dodge the raindrops. Be careful, the sea will be generally rough with a wind speed of up to 28mph km/h (with gusts up to 37.9mph). Wave height will be up to 11.8ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 5°C (41°F) | 6°C (43°F) | 7°C (44°F) | 7°C (45°F) | 9°C (48°F) | 10°C (49°F) | 9°C (48°F) | 8°C (47°F) |
| Perceived temperature | 0°C (33°F) | 1°C (34°F) | 1°C (34°F) | 2°C (36°F) | 5°C (41°F) | 6°C (44°F) | 5°C (41°F) | 5°C (41°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 86% | 77% | 82% | 89% | 88% | 83% | 78% | 79% |
| Barometric pressure | 1012 hPa | 1009 hPa | 1006 hPa | 1005 hPa | 1004 hPa | 1005 hPa | 1007 hPa | 1008 hPa |
| Cloud cover | 58% | 71% | 100% | 91% | 100% | 94% | 84% | 12% |
| Heat index | 5°C (41°F) | 6°C (43°F) | 7°C (44°F) | 7°C (45°F) | 9°C (48°F) | 10°C (49°F) | 9°C (48°F) | 8°C (47°F) |
| Dew point | 3°C (37°F) | 2°C (36°F) | 4°C (39°F) | 6°C (42°F) | 7°C (45°F) | 7°C (44°F) | 5°C (41°F) | 5°C (41°F) |
| Wind | ||||||||
| Speed | 25km/h (15mph) | 35km/h (21mph) | 45km/h (28mph) | 40km/h (25mph) | 29km/h (18mph) | 25km/h (15mph) | 31km/h (19mph) | 23km/h (14mph) |
| Gusts | 37km/h (23mph) | 47km/h (30mph) | 61km/h (38mph) | 57km/h (35mph) | 46km/h (28mph) | 39km/h (24mph) | 32km/h (20mph) | 35km/h (22mph) |
| Direction | 166° SSE | 173° S | 176° S | 171° S | 190° S | 244° WSW | 230° SW | 225° SW |
| Wind chill | 0°C (33°F) | 1°C (34°F) | 1°C (34°F) | 2°C (36°F) | 5°C (41°F) | 6°C (44°F) | 5°C (41°F) | 5°C (41°F) |
| Waves | ||||||||
| Height | 2.4m (8.0ft) | 2.6m (8.4ft) | 2.7m (9.0ft) | 2.7m (9.0ft) | 2.6m (8.5ft) | 2.5m (8.2ft) | 2.6m (8.5ft) | 3.6m (11.8ft) |
| Direction | 302° WNW | 301° WNW | 296° WNW | 295° WNW | 294° WNW | 295° WNW | 296° WNW | 304° NW |
| Period | 13.4 sec. | 13.1 sec. | 12.6 sec. | 12.8 sec. | 12.9 sec. | 12.9 sec. | 12.9 sec. | 17.4 sec. |
| Significant height | 1.1m (3.6ft) | 1.7m (5.6ft) | 1.6m (5.2ft) | 1.2m (3.9ft) | 0.8m (2.6ft) | 0.6m (2ft) | 0.9m (3ft) | 0.7m (2.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) |
Sea weather on Thursday 18 December 2025
On Thursday 18 December 2025, the sun will rise at 08:52 and will set at 16:03 on the beach(es) of Letterkenny. The outside temperature will be a high of 54°F t and a low of 45°F. Precipitation is in the forecast (0.2in throughout the day): choose the right time to go to the beach and dodge the raindrops. Be careful, the sea will be generally rough with a wind speed of up to 36mph km/h (with gusts up to 37.3mph). Wave height will be up to 19.4ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | |  | | | | |
| Outside temperature | 7°C (45°F) | 7°C (44°F) | 7°C (44°F) | 7°C (45°F) | 11°C (52°F) | 12°C (53°F) | 8°C (46°F) | 8°C (46°F) |
| Perceived temperature | 4°C (40°F) | 4°C (39°F) | 4°C (38°F) | 2°C (36°F) | 7°C (44°F) | 8°C (46°F) | 2°C (36°F) | 2°C (35°F) |
| Precipitation | 0in | 0in | 0in | 0.1in | 0.1in | 0in | 0in | 0in |
| Humidity | 86% | 88% | 84% | 89% | 88% | 84% | 75% | 69% |
| Barometric pressure | 1011 hPa | 1008 hPa | 1005 hPa | 996 hPa | 985 hPa | 981 hPa | 980 hPa | 978 hPa |
| Cloud cover | 61% | 100% | 100% | 100% | 100% | 100% | 39% | 100% |
| Heat index | 7°C (45°F) | 7°C (44°F) | 7°C (44°F) | 7°C (45°F) | 11°C (52°F) | 12°C (53°F) | 8°C (46°F) | 8°C (46°F) |
| Dew point | 5°C (41°F) | 5°C (41°F) | 4°C (40°F) | 6°C (42°F) | 9°C (48°F) | 9°C (48°F) | 4°C (39°F) | 2°C (36°F) |
| Wind | ||||||||
| Speed | 19km/h (12mph) | 14km/h (9mph) | 18km/h (11mph) | 44km/h (27mph) | 49km/h (31mph) | 49km/h (30mph) | 57km/h (35mph) | 58km/h (36mph) |
| Gusts | 29km/h (18mph) | 23km/h (14mph) | 27km/h (17mph) | 60km/h (37mph) | 56km/h (35mph) | 54km/h (33mph) | 58km/h (36mph) | 60km/h (37mph) |
| Direction | 206° SSW | 142° SE | 131° SE | 96° E | 149° SSE | 163° SSE | 168° SSE | 168° SSE |
| Wind chill | 4°C (40°F) | 4°C (39°F) | 4°C (38°F) | 2°C (36°F) | 7°C (44°F) | 8°C (46°F) | 2°C (36°F) | 2°C (35°F) |
| Waves | ||||||||
| Height | 5.6m (18.3ft) | 5.9m (19.2ft) | 5.6m (18.4ft) | 5.5m (17.9ft) | 5.3m (17.4ft) | 5.0m (16.4ft) | 4.6m (15.1ft) | 4.1m (13.6ft) |
| Direction | 306° NW | 304° NW | 303° WNW | 304° WNW | 304° NW | 306° NW | 305° NW | 305° NW |
| Period | 21.4 sec. | 20.8 sec. | 20.1 sec. | 19.6 sec. | 19.4 sec. | 19.1 sec. | 18.5 sec. | 17.6 sec. |
| Significant height | 0.7m (2.3ft) | 0.7m (2.3ft) | 0.4m (1.3ft) | 0.5m (1.6ft) | 1.0m (3.3ft) | 1.4m (4.6ft) | 1.7m (5.6ft) | 1.5m (4.9ft) |
| Sea water temperature | ||||||||
| Water temperature | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) |
Sea weather on Friday 19 December 2025
On Friday 19 December 2025, the sun will rise at 08:53 and will set at 16:03 on the beach(es) of Letterkenny. The outside temperature will be a high of 49°F t and a low of 45°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! Be careful, the sea will be generally rough with a wind speed of up to 44.1mph km/h (with gusts up to 47.2mph). Wave height will be up to 12.1ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 7°C (45°F) | 9°C (49°F) | 9°C (48°F) | 8°C (47°F) | 8°C (46°F) | 8°C (47°F) | 8°C (46°F) | 8°C (46°F) |
| Perceived temperature | 1°C (34°F) | 4°C (40°F) | 3°C (37°F) | 3°C (38°F) | 3°C (38°F) | 4°C (39°F) | 3°C (38°F) | 4°C (39°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 84% | 84% | 79% | 78% | 75% | 71% | 69% | 74% |
| Barometric pressure | 975 hPa | 979 hPa | 991 hPa | 1001 hPa | 1007 hPa | 1010 hPa | 1013 hPa | 1015 hPa |
| Cloud cover | 100% | 99% | 100% | 88% | 86% | 81% | 77% | 74% |
| Heat index | 7°C (45°F) | 9°C (49°F) | 9°C (48°F) | 8°C (47°F) | 8°C (46°F) | 8°C (47°F) | 8°C (46°F) | 8°C (46°F) |
| Dew point | 5°C (40°F) | 7°C (44°F) | 5°C (42°F) | 5°C (41°F) | 4°C (39°F) | 3°C (38°F) | 2°C (36°F) | 3°C (38°F) |
| Wind | ||||||||
| Speed | 55km/h (34mph) | 54km/h (34mph) | 71km/h (44mph) | 48km/h (30mph) | 44km/h (28mph) | 39km/h (24mph) | 33km/h (21mph) | 27km/h (17mph) |
| Gusts | 70km/h (43mph) | 57km/h (35mph) | 76km/h (47mph) | 65km/h (40mph) | 50km/h (31mph) | 40km/h (25mph) | 35km/h (21mph) | 42km/h (26mph) |
| Direction | 170° S | 268° W | 291° WNW | 272° W | 267° W | 264° W | 250° WSW | 225° SW |
| Wind chill | 1°C (34°F) | 4°C (40°F) | 3°C (37°F) | 3°C (38°F) | 3°C (38°F) | 4°C (39°F) | 3°C (38°F) | 4°C (39°F) |
| Waves | ||||||||
| Height | 3.7m (12.2ft) | 3.4m (11.0ft) | 3.1m (10.3ft) | 3.1m (10.1ft) | 3.0m (9.7ft) | 2.8m (9.2ft) | 2.6m (8.7ft) | 2.6m (8.7ft) |
| Direction | 307° NW | 305° NW | 306° NW | 308° NW | 306° NW | 307° NW | 308° NW | 304° NW |
| Period | 17.2 sec. | 16.2 sec. | 15.9 sec. | 15.5 sec. | 14.9 sec. | 14.6 sec. | 14.3 sec. | 13.6 sec. |
| Significant height | 0.8m (2.6ft) | 0.3m (1ft) | 0.2m (0.7ft) | 0.1m (0.3ft) | 0.1m (0.3ft) | 0.1m (0.3ft) | 0.3m (1ft) | 1.0m (3.3ft) |
| Sea water temperature | ||||||||
| Water temperature | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) |
Sea weather on Saturday 20 December 2025
On Saturday 20 December 2025, the sun will rise at 08:53 and will set at 16:03 on the beach(es) of Letterkenny. The outside temperature will be a high of 47°F t and a low of 41°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 21.1mph km/h (with gusts up to 31.7mph). Wave height will be up to 8.2ft today.
| 0:00 | 3:00 | 6:00 | 9:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
| Weather | ||||||||
| Sky condition | | | | | | | | |
| Outside temperature | 6°C (44°F) | 5°C (42°F) | 6°C (43°F) | 6°C (43°F) | 6°C (43°F) | 7°C (45°F) | 7°C (45°F) | 8°C (46°F) |
| Perceived temperature | 3°C (37°F) | 1°C (35°F) | 2°C (36°F) | 2°C (35°F) | 2°C (35°F) | 3°C (37°F) | 3°C (37°F) | 3°C (38°F) |
| Precipitation | 0in | 0in | 0in | 0in | 0in | 0in | 0in | 0in |
| Humidity | 82% | 87% | 86% | 88% | 81% | 80% | 81% | 83% |
| Barometric pressure | 1016 hPa | 1016 hPa | 1016 hPa | 1016 hPa | 1016 hPa | 1015 hPa | 1014 hPa | 1013 hPa |
| Cloud cover | 67% | 95% | 100% | 59% | 50% | 100% | 100% | 51% |
| Heat index | 6°C (44°F) | 5°C (42°F) | 6°C (43°F) | 6°C (43°F) | 6°C (43°F) | 7°C (45°F) | 7°C (45°F) | 8°C (46°F) |
| Dew point | 4°C (38°F) | 3°C (38°F) | 4°C (39°F) | 4°C (39°F) | 3°C (38°F) | 4°C (39°F) | 4°C (39°F) | 5°C (41°F) |
| Wind | ||||||||
| Speed | 22km/h (14mph) | 21km/h (13mph) | 23km/h (14mph) | 22km/h (14mph) | 28km/h (18mph) | 30km/h (18mph) | 32km/h (20mph) | 34km/h (21mph) |
| Gusts | 35km/h (22mph) | 34km/h (21mph) | 35km/h (22mph) | 35km/h (22mph) | 42km/h (26mph) | 44km/h (27mph) | 48km/h (30mph) | 51km/h (31mph) |
| Direction | 194° SSW | 173° S | 166° SSE | 158° SSE | 162° SSE | 169° SSE | 166° SSE | 170° S |
| Wind chill | 3°C (37°F) | 1°C (35°F) | 2°C (36°F) | 2°C (35°F) | 2°C (35°F) | 3°C (37°F) | 3°C (37°F) | 3°C (38°F) |
| Waves | ||||||||
| Height | 2.5m (8.1ft) | 2.3m (7.6ft) | 2.4m (8.0ft) | 2.4m (8.0ft) | 2.3m (7.4ft) | 2.1m (6.8ft) | 1.9m (6.3ft) | 1.8m (5.8ft) |
| Direction | 305° NW | 305° NW | 303° WNW | 303° WNW | 303° WNW | 303° WNW | 303° WNW | 301° WNW |
| Period | 13.3 sec. | 13.1 sec. | 12.3 sec. | 11.9 sec. | 11.9 sec. | 11.7 sec. | 11.1 sec. | 10.9 sec. |
| Significant height | 0.8m (2.6ft) | 0.8m (2.6ft) | 1.2m (3.9ft) | 0.9m (3ft) | 0.7m (2.3ft) | 0.5m (1.6ft) | 0.5m (1.6ft) | 0.5m (1.6ft) |
| Sea water temperature | ||||||||
| Water temperature | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) | 11°C (51°F) |