Sea weather in Dún Laoghaire in Ireland All the beach weather in Dún Laoghaire

All the essential weather information for enjoying the beach in Dún Laoghaire 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 Dún Laoghaire over the next 7 days?

Discover the best moment to go to the beach in Dún Laoghaire in Ireland this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Dún Laoghaire. You can see full forecasts by clicking on the day you want to see in the table below.

Date Outside temp. Our opinion
Saturday 18 July 202652°F to 59°Fdiscouraged
Sunday 19 July 202656°F to 59°Frecommended
Monday 20 July 202654°F to 59°Fdiscouraged
Tuesday 21 July 202654°F to 61°Fdiscouraged
Wednesday 22 July 202656°F to 61°Fdiscouraged
Thursday 23 July 202654°F to 59°Fdiscouraged
Friday 24 July 202658°F to 63°Frecommended

Sea Weather: Your daily and hourly sea weather in Dún Laoghaire

Sea weather on Saturday 18 July 2026

On Saturday 18 July 2026, the sun will rise at 05:20 and will set at 21:41 on the beach(es) of Dún Laoghaire. The outside temperature will be a high of 59°F t and a low of 52°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 14.9mph km/h (with gusts up to 20.5mph). Wave height will be up to 1.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature15°C (58°F)13°C (55°F)13°C (55°F)15°C (58°F)14°C (58°F)12°C (53°F)13°C (55°F)14°C (57°F)
Perceived temperature13°C (55°F)11°C (52°F)10°C (51°F)13°C (56°F)12°C (54°F)10°C (50°F)11°C (53°F)13°C (55°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity80%84%81%78%74%78%84%85%
Barometric pressure1021 hPa1021 hPa1022 hPa1022 hPa1023 hPa1023 hPa1024 hPa1025 hPa
Cloud cover0%0%0%87%3%0%11%22%
Heat index15°C (58°F)13°C (55°F)13°C (55°F)15°C (58°F)14°C (58°F)12°C (53°F)13°C (55°F)14°C (57°F)
Dew point11°C (52°F)10°C (51°F)10°C (49°F)11°C (52°F)10°C (49°F)8°C (46°F)10°C (50°F)12°C (53°F)
Wind
Speed20km/h (13mph)22km/h (13mph)24km/h (15mph)22km/h (14mph)23km/h (14mph)17km/h (10mph)14km/h (9mph)14km/h (9mph)
Gusts32km/h (20mph)32km/h (20mph)33km/h (21mph)33km/h (21mph)24km/h (15mph)19km/h (12mph)28km/h (17mph)26km/h (16mph)
Direction 321°
NW
310°
NW
317°
NW
342°
NNW

N
48°
NE
11°
N
341°
NNW
Wind chill13°C (55°F)11°C (52°F)10°C (51°F)13°C (56°F)12°C (54°F)10°C (50°F)11°C (53°F)13°C (55°F)
Waves
Height0.4m (1.2ft)0.4m (1.2ft)0.4m (1.3ft)0.4m (1.4ft)0.5m (1.6ft)0.4m (1.2ft)0.3m (1.0ft)0.3m (1.1ft)
Direction 19°
NNE

N
346°
NNW
359°
N

N
23°
NNE
29°
NNE
31°
NNE
Period5.2 sec.3.5 sec.3.7 sec.3.7 sec.3.7 sec.6.5 sec.5.3 sec.4.6 sec.
Significant height0.6m (2ft)0.6m (2ft)0.7m (2.3ft)0.7m (2.3ft)0.7m (2.3ft)0.5m (1.6ft)0.3m (1ft)0.5m (1.6ft)
Sea water temperature
Water temperature12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)

Sea weather on Sunday 19 July 2026

On Sunday 19 July 2026, the sun will rise at 05:21 and will set at 21:40 on the beach(es) of Dún Laoghaire. The outside temperature will be a high of 59°F t and a low of 56°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 1.3ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature14°C (58°F)14°C (57°F)14°C (56°F)15°C (59°F)13°C (56°F)13°C (56°F)14°C (57°F)15°C (59°F)
Perceived temperature13°C (55°F)13°C (55°F)12°C (54°F)14°C (57°F)12°C (53°F)13°C (55°F)14°C (58°F)15°C (59°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity87%87%84%71%77%78%68%72%
Barometric pressure1026 hPa1026 hPa1026 hPa1027 hPa1028 hPa1028 hPa1028 hPa1029 hPa
Cloud cover16%18%17%91%9%24%15%21%
Heat index14°C (58°F)14°C (57°F)14°C (56°F)15°C (59°F)13°C (56°F)13°C (56°F)14°C (57°F)15°C (59°F)
Dew point12°C (54°F)12°C (53°F)11°C (51°F)10°C (49°F)9°C (49°F)9°C (49°F)8°C (47°F)10°C (50°F)
Wind
Speed17km/h (10mph)13km/h (8mph)13km/h (8mph)15km/h (10mph)19km/h (12mph)6km/h (4mph)4km/h (3mph)5km/h (3mph)
Gusts27km/h (17mph)22km/h (14mph)20km/h (13mph)24km/h (15mph)33km/h (21mph)14km/h (8mph)9km/h (6mph)11km/h (7mph)
Direction 341°
NNW
322°
NW
310°
NW
352°
N
32°
NNE
58°
ENE
84°
E
322°
NW
Wind chill13°C (55°F)13°C (55°F)12°C (54°F)14°C (57°F)12°C (53°F)13°C (55°F)14°C (58°F)15°C (59°F)
Waves
Height0.3m (1.1ft)0.3m (0.9ft)0.2m (0.7ft)0.2m (0.6ft)0.2m (0.8ft)0.2m (0.6ft)0.1m (0.4ft)0.4m (1.4ft)
Direction 35°
NE
34°
NE
35°
NE
36°
NE
33°
NNE
43°
NE
38°
NE
42°
NE
Period4.1 sec.3.7 sec.3.4 sec.3.1 sec.3.1 sec.3.0 sec.2.9 sec.2.7 sec.
Significant height0.5m (1.6ft)0.5m (1.6ft)0.4m (1.3ft)0.3m (1ft)0.6m (2ft)0.2m (0.7ft)0.2m (0.7ft)0.1m (0.3ft)
Sea water temperature
Water temperature12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)

Sea weather on Monday 20 July 2026

On Monday 20 July 2026, the sun will rise at 05:23 and will set at 21:39 on the beach(es) of Dún Laoghaire. The outside temperature will be a high of 59°F t and a low of 54°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 14.9mph km/h (with gusts up to 23mph). Wave height will be up to 2ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature15°C (59°F)14°C (57°F)13°C (56°F)15°C (58°F)14°C (57°F)13°C (55°F)12°C (54°F)15°C (58°F)
Perceived temperature14°C (57°F)12°C (54°F)12°C (53°F)13°C (55°F)12°C (54°F)12°C (53°F)11°C (51°F)14°C (57°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity75%86%88%82%83%83%88%86%
Barometric pressure1029 hPa1028 hPa1029 hPa1030 hPa1030 hPa1030 hPa1031 hPa1032 hPa
Cloud cover32%20%18%89%12%4%5%3%
Heat index15°C (59°F)14°C (57°F)13°C (56°F)15°C (58°F)14°C (57°F)13°C (55°F)12°C (54°F)15°C (58°F)
Dew point11°C (51°F)12°C (53°F)11°C (52°F)12°C (53°F)11°C (52°F)10°C (50°F)10°C (51°F)12°C (54°F)
Wind
Speed16km/h (10mph)18km/h (11mph)20km/h (13mph)24km/h (15mph)21km/h (13mph)14km/h (9mph)16km/h (10mph)15km/h (9mph)
Gusts28km/h (17mph)29km/h (18mph)29km/h (18mph)35km/h (22mph)37km/h (23mph)30km/h (19mph)34km/h (21mph)26km/h (16mph)
Direction 314°
NW
310°
NW
308°
NW
339°
NNW
19°
NNE
33°
NNE
359°
N
347°
NNW
Wind chill14°C (57°F)12°C (54°F)12°C (53°F)13°C (55°F)12°C (54°F)12°C (53°F)11°C (51°F)14°C (57°F)
Waves
Height0.6m (1.9ft)0.2m (0.6ft)0.2m (0.8ft)0.2m (0.8ft)0.2m (0.7ft)0.2m (0.6ft)0.2m (0.5ft)0.2m (0.7ft)
Direction 142°
SE
337°
NNW
10°
N
34°
NE
30°
NNE
31°
NNE
29°
NNE
29°
NNE
Period2.6 sec.2.9 sec.3.6 sec.3.5 sec.3.8 sec.3.8 sec.4.1 sec.4.3 sec.
Significant height0.3m (1ft)0.4m (1.3ft)0.4m (1.3ft)0.4m (1.3ft)0.4m (1.3ft)0.4m (1.3ft)0.3m (1ft)0.4m (1.3ft)
Sea water temperature
Water temperature12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)

Sea weather on Tuesday 21 July 2026

On Tuesday 21 July 2026, the sun will rise at 05:24 and will set at 21:37 on the beach(es) of Dún Laoghaire. The outside temperature will be a high of 61°F t and a low of 54°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 23.6mph). Wave height will be up to 1ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature15°C (58°F)13°C (56°F)13°C (55°F)15°C (58°F)13°C (56°F)12°C (53°F)15°C (59°F)16°C (61°F)
Perceived temperature14°C (56°F)12°C (53°F)11°C (52°F)13°C (56°F)12°C (53°F)10°C (50°F)15°C (59°F)16°C (61°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity86%87%87%83%86%85%83%82%
Barometric pressure1032 hPa1032 hPa1033 hPa1033 hPa1032 hPa1032 hPa1030 hPa1030 hPa
Cloud cover5%7%18%3%3%2%98%32%
Heat index15°C (58°F)13°C (56°F)13°C (55°F)15°C (58°F)13°C (56°F)12°C (53°F)15°C (59°F)16°C (61°F)
Dew point12°C (54°F)11°C (52°F)11°C (52°F)12°C (53°F)11°C (52°F)9°C (49°F)12°C (53°F)13°C (55°F)
Wind
Speed14km/h (9mph)17km/h (11mph)18km/h (11mph)17km/h (11mph)18km/h (11mph)13km/h (8mph)2km/h (1mph)21km/h (13mph)
Gusts23km/h (15mph)26km/h (16mph)26km/h (16mph)25km/h (16mph)20km/h (13mph)28km/h (17mph)5km/h (3mph)38km/h (24mph)
Direction 329°
NNW
316°
NW
313°
NW
345°
NNW
31°
NNE
85°
E
231°
SW
341°
NNW
Wind chill14°C (56°F)12°C (53°F)11°C (52°F)13°C (56°F)12°C (53°F)10°C (50°F)15°C (59°F)16°C (61°F)
Waves
Height0.2m (0.8ft)0.3m (0.9ft)0.2m (0.8ft)0.2m (0.7ft)0.2m (0.6ft)0.1m (0.5ft)0.2m (0.6ft)0.3m (1.1ft)
Direction 30°
NNE
32°
NNE
33°
NNE
36°
NE
35°
NE
59°
ENE
143°
SE
140°
SE
Period3.9 sec.3.7 sec.3.6 sec.3.5 sec.3.4 sec.2.9 sec.2.6 sec.2.9 sec.
Significant height0.5m (1.6ft)0.5m (1.6ft)0.5m (1.6ft)0.4m (1.3ft)0.4m (1.3ft)0.2m (0.7ft)0.2m (0.7ft)0.3m (1ft)
Sea water temperature
Water temperature12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)

Sea weather on Wednesday 22 July 2026

On Wednesday 22 July 2026, the sun will rise at 05:26 and will set at 21:36 on the beach(es) of Dún Laoghaire. The outside temperature will be a high of 61°F t and a low of 56°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 19.3mph km/h (with gusts up to 29.2mph). Wave height will be up to 1.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature15°C (59°F)14°C (56°F)13°C (56°F)15°C (60°F)16°C (60°F)16°C (60°F)13°C (56°F)15°C (59°F)
Perceived temperature13°C (56°F)11°C (52°F)11°C (52°F)15°C (60°F)16°C (60°F)16°C (60°F)12°C (54°F)14°C (57°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity80%84%85%82%80%79%84%82%
Barometric pressure1029 hPa1028 hPa1027 hPa1026 hPa1026 hPa1025 hPa1025 hPa1025 hPa
Cloud cover57%59%57%84%82%33%7%17%
Heat index15°C (59°F)14°C (56°F)13°C (56°F)15°C (60°F)16°C (60°F)16°C (60°F)13°C (56°F)15°C (59°F)
Dew point11°C (53°F)11°C (52°F)11°C (52°F)12°C (54°F)12°C (54°F)12°C (54°F)10°C (51°F)12°C (53°F)
Wind
Speed25km/h (15mph)27km/h (17mph)26km/h (16mph)31km/h (19mph)25km/h (15mph)18km/h (11mph)13km/h (8mph)16km/h (10mph)
Gusts38km/h (24mph)39km/h (25mph)37km/h (23mph)47km/h (29mph)42km/h (26mph)18km/h (11mph)27km/h (17mph)29km/h (18mph)
Direction 307°
NW
307°
NW
306°
NW
328°
NNW
337°
NNW
22°
NNE
36°
NE
331°
NNW
Wind chill13°C (56°F)11°C (52°F)11°C (52°F)15°C (60°F)16°C (60°F)16°C (60°F)12°C (54°F)14°C (57°F)
Waves
Height0.2m (0.8ft)0.3m (1.0ft)0.4m (1.2ft)0.4m (1.3ft)0.5m (1.5ft)0.4m (1.4ft)0.5m (1.6ft)0.5m (1.6ft)
Direction 338°
NNW
340°
NNW
339°
NNW
350°
N

N
14°
NNE
17°
NNE
23°
NNE
Period4.7 sec.4.2 sec.4.0 sec.4.0 sec.4.0 sec.4.0 sec.4.0 sec.4.1 sec.
Significant height0.5m (1.6ft)0.6m (2ft)0.7m (2.3ft)0.7m (2.3ft)0.7m (2.3ft)0.6m (2ft)0.7m (2.3ft)0.6m (2ft)
Sea water temperature
Water temperature12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)

Sea weather on Thursday 23 July 2026

On Thursday 23 July 2026, the sun will rise at 05:27 and will set at 21:35 on the beach(es) of Dún Laoghaire. The outside temperature will be a high of 59°F t and a low of 54°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 14.9mph km/h (with gusts up to 22.4mph). Wave height will be up to 1.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature14°C (57°F)12°C (53°F)12°C (53°F)14°C (58°F)13°C (55°F)12°C (54°F)13°C (55°F)15°C (58°F)
Perceived temperature12°C (53°F)10°C (49°F)10°C (49°F)13°C (55°F)12°C (53°F)12°C (54°F)13°C (56°F)15°C (58°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity84%88%87%78%86%84%76%83%
Barometric pressure1025 hPa1026 hPa1026 hPa1026 hPa1027 hPa1027 hPa1026 hPa1026 hPa
Cloud cover1%17%20%8%8%6%3%4%
Heat index14°C (57°F)12°C (53°F)12°C (53°F)14°C (58°F)13°C (55°F)12°C (54°F)13°C (55°F)15°C (58°F)
Dew point11°C (52°F)10°C (50°F)10°C (49°F)10°C (51°F)10°C (51°F)10°C (49°F)9°C (48°F)12°C (53°F)
Wind
Speed24km/h (15mph)21km/h (13mph)21km/h (13mph)19km/h (12mph)12km/h (8mph)6km/h (4mph)3km/h (2mph)6km/h (4mph)
Gusts36km/h (22mph)31km/h (19mph)29km/h (18mph)26km/h (16mph)22km/h (13mph)12km/h (8mph)7km/h (4mph)12km/h (8mph)
Direction 322°
NW
303°
WNW
303°
WNW
341°
NNW
45°
NE
113°
ESE
166°
SSE
343°
NNW
Wind chill12°C (53°F)10°C (49°F)10°C (49°F)13°C (55°F)12°C (53°F)12°C (54°F)13°C (56°F)15°C (58°F)
Waves
Height0.5m (1.7ft)0.4m (1.5ft)0.4m (1.3ft)0.3m (1.0ft)0.3m (1.0ft)0.2m (0.7ft)0.2m (0.6ft)0.2m (0.8ft)
Direction 27°
NNE
16°
NNE
17°
NNE
25°
NNE
32°
NNE
33°
NNE
35°
NE
27°
NNE
Period4.1 sec.4.3 sec.4.4 sec.4.3 sec.4.1 sec.3.8 sec.3.5 sec.3.9 sec.
Significant height0.8m (2.6ft)0.8m (2.6ft)0.7m (2.3ft)0.5m (1.6ft)0.6m (2ft)0.3m (1ft)0.3m (1ft)0.4m (1.3ft)
Sea water temperature
Water temperature12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)

Sea weather on Friday 24 July 2026

On Friday 24 July 2026, the sun will rise at 05:29 and will set at 21:33 on the beach(es) of Dún Laoghaire. The outside temperature will be a high of 63°F t and a low of 58°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 8.7mph km/h (with gusts up to 18mph). Wave height will be up to 0.7ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature15°C (59°F)15°C (58°F)14°C (58°F)16°C (61°F)17°C (62°F)17°C (62°F)15°C (60°F)17°C (63°F)
Perceived temperature16°C (60°F)14°C (58°F)14°C (56°F)16°C (61°F)17°C (62°F)17°C (62°F)15°C (60°F)17°C (63°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity82%82%82%72%66%72%78%75%
Barometric pressure1027 hPa1026 hPa1025 hPa1025 hPa1024 hPa1023 hPa1021 hPa1020 hPa
Cloud cover14%11%100%82%98%21%8%7%
Heat index15°C (59°F)15°C (58°F)14°C (58°F)16°C (61°F)17°C (62°F)17°C (62°F)15°C (60°F)17°C (63°F)
Dew point12°C (53°F)12°C (53°F)11°C (52°F)11°C (52°F)10°C (51°F)11°C (53°F)12°C (53°F)13°C (55°F)
Wind
Speed4km/h (3mph)9km/h (6mph)12km/h (8mph)8km/h (5mph)9km/h (5mph)14km/h (9mph)12km/h (7mph)9km/h (6mph)
Gusts8km/h (5mph)17km/h (11mph)22km/h (13mph)13km/h (8mph)17km/h (10mph)29km/h (18mph)25km/h (16mph)19km/h (12mph)
Direction 298°
WNW
316°
NW
302°
WNW
314°
NW
162°
SSE
150°
SSE
156°
SSE
260°
W
Wind chill16°C (60°F)14°C (58°F)14°C (56°F)16°C (61°F)17°C (62°F)17°C (62°F)15°C (60°F)17°C (63°F)
Waves
Height0.1m (0.4ft)0.1m (0.4ft)0.1m (0.4ft)0.1m (0.4ft)0.1m (0.4ft)0.2m (0.5ft)0.2m (0.5ft)0.1m (0.4ft)
Direction 108°
ESE
87°
E
147°
SSE
147°
SSE
142°
SE
130°
SE
137°
SE
148°
SSE
Period3.1 sec.3.0 sec.3.3 sec.3.3 sec.3.2 sec.3.1 sec.3.1 sec.1.9 sec.
Significant height0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.2m (0.7ft)0.3m (1ft)0.4m (1.3ft)0.3m (1ft)0.3m (1ft)
Sea water temperature
Water temperature12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)12°C (53°F)

Sea weather chart over the next 7 days

Outside temperature

Wind speed

Precipitation

Wave height

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