Sea weather in Cardiff in Wales All the beach weather in Cardiff

All the essential weather information for enjoying the beach in Cardiff in Wales, 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 Cardiff over the next 7 days?

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

Date Outside temp. Our opinion
Sunday 19 July 202656°F to 68°Frecommended
Monday 20 July 202656°F to 70°Fdiscouraged
Tuesday 21 July 202656°F to 74°Fdiscouraged
Wednesday 22 July 202659°F to 74°Fdiscouraged
Thursday 23 July 202658°F to 70°Fdiscouraged
Friday 24 July 202658°F to 68°Fdiscouraged
Saturday 25 July 202659°F to 65°Fnot recommended

Sea Weather: Your daily and hourly sea weather in Cardiff

Sea weather on Sunday 19 July 2026

On Sunday 19 July 2026, the sun will rise at 05:18 and will set at 21:19 on the beach(es) of Cardiff. The outside temperature will be a high of 68°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 11.2mph 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 temperature17°C (62°F)13°C (56°F)14°C (56°F)17°C (63°F)19°C (65°F)20°C (68°F)19°C (67°F)17°C (63°F)
Perceived temperature17°C (62°F)12°C (53°F)13°C (55°F)17°C (63°F)19°C (65°F)20°C (68°F)19°C (67°F)17°C (63°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity65%75%70%55%52%50%57%65%
Barometric pressure1022 hPa1024 hPa1025 hPa1026 hPa1026 hPa1025 hPa1024 hPa1025 hPa
Cloud cover33%32%12%10%40%46%27%14%
Heat index17°C (62°F)13°C (56°F)14°C (56°F)17°C (63°F)19°C (65°F)20°C (68°F)19°C (67°F)17°C (63°F)
Dew point10°C (50°F)9°C (48°F)8°C (47°F)8°C (46°F)9°C (47°F)9°C (49°F)10°C (51°F)11°C (51°F)
Wind
Speed13km/h (8mph)17km/h (11mph)12km/h (7mph)9km/h (6mph)4km/h (2mph)14km/h (9mph)18km/h (11mph)11km/h (7mph)
Gusts26km/h (16mph)30km/h (19mph)17km/h (11mph)11km/h (7mph)6km/h (4mph)22km/h (14mph)33km/h (21mph)23km/h (15mph)
Direction 72°
ENE
57°
ENE
73°
ENE
89°
E
188°
S
272°
W
274°
W
328°
NNW
Wind chill17°C (62°F)12°C (53°F)13°C (55°F)17°C (63°F)19°C (65°F)20°C (68°F)19°C (67°F)17°C (63°F)
Waves
Height0.4m (1.2ft)0.3m (1.0ft)0.3m (1.0ft)0.2m (0.6ft)0.2m (0.6ft)0.2m (0.6ft)0.3m (1.0ft)0.3m (0.9ft)
Direction 48°
NE
48°
NE
47°
NE
48°
NE
273°
W
262°
W
271°
W
276°
W
Period4.1 sec.3.9 sec.3.8 sec.3.8 sec.2.1 sec.2.0 sec.2.0 sec.2.0 sec.
Significant height0.7m (2.3ft)0.6m (2ft)0.6m (2ft)0.5m (1.6ft)0.1m (0.3ft)0.7m (2.3ft)0.8m (2.6ft)0.6m (2ft)
Sea water temperature
Water temperature15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)

Sea weather on Monday 20 July 2026

On Monday 20 July 2026, the sun will rise at 05:20 and will set at 21:18 on the beach(es) of Cardiff. The outside temperature will be a high of 70°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 13.1mph km/h (with gusts up to 19.3mph). Wave height will be up to 1.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature16°C (60°F)13°C (56°F)14°C (57°F)18°C (64°F)19°C (67°F)21°C (70°F)20°C (68°F)17°C (63°F)
Perceived temperature16°C (60°F)12°C (53°F)13°C (55°F)18°C (64°F)19°C (67°F)21°C (70°F)20°C (68°F)17°C (63°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity62%65%64%47%40%38%50%70%
Barometric pressure1026 hPa1027 hPa1028 hPa1028 hPa1027 hPa1026 hPa1026 hPa1027 hPa
Cloud cover9%13%31%9%6%8%7%5%
Heat index16°C (60°F)13°C (56°F)14°C (57°F)18°C (64°F)19°C (67°F)21°C (70°F)20°C (68°F)17°C (63°F)
Dew point8°C (47°F)7°C (44°F)7°C (45°F)6°C (44°F)6°C (42°F)6°C (43°F)9°C (49°F)12°C (53°F)
Wind
Speed16km/h (10mph)15km/h (10mph)12km/h (8mph)9km/h (6mph)1km/h (1mph)12km/h (7mph)21km/h (13mph)15km/h (9mph)
Gusts30km/h (19mph)27km/h (17mph)18km/h (11mph)12km/h (7mph)2km/h (1mph)22km/h (14mph)24km/h (15mph)31km/h (19mph)
Direction 52°
NE
58°
ENE
58°
ENE
78°
ENE
151°
SSE
241°
WSW
273°
W
310°
NW
Wind chill16°C (60°F)12°C (53°F)13°C (55°F)18°C (64°F)19°C (67°F)21°C (70°F)20°C (68°F)17°C (63°F)
Waves
Height0.3m (1.1ft)0.3m (1.1ft)0.2m (0.8ft)0.1m (0.4ft)0.5m (1.6ft)0.1m (0.5ft)0.3m (0.9ft)0.3m (0.9ft)
Direction 34°
NE
42°
NE
45°
NE
42°
NE
273°
W
258°
WSW
269°
W
275°
W
Period2.7 sec.3.6 sec.3.6 sec.2.2 sec.2.1 sec.2.1 sec.2.1 sec.2.1 sec.
Significant height1.0m (3.3ft)0.7m (2.3ft)0.6m (2ft)0.2m (0.7ft)0.1m (0.3ft)0.7m (2.3ft)0.7m (2.3ft)0.6m (2ft)
Sea water temperature
Water temperature15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)

Sea weather on Tuesday 21 July 2026

On Tuesday 21 July 2026, the sun will rise at 05:21 and will set at 21:17 on the beach(es) of Cardiff. The outside temperature will be a high of 74°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 13.7mph 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 temperature18°C (64°F)14°C (56°F)14°C (58°F)19°C (65°F)21°C (70°F)23°C (74°F)21°C (70°F)19°C (67°F)
Perceived temperature18°C (64°F)12°C (54°F)13°C (55°F)19°C (65°F)21°C (70°F)25°C (76°F)21°C (70°F)19°C (67°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity62%79%75%57%50%45%54%66%
Barometric pressure1027 hPa1028 hPa1030 hPa1030 hPa1030 hPa1028 hPa1027 hPa1027 hPa
Cloud cover6%9%15%7%9%18%11%13%
Heat index18°C (64°F)14°C (56°F)14°C (58°F)19°C (65°F)21°C (70°F)25°C (76°F)24°C (76°F)19°C (67°F)
Dew point10°C (50°F)10°C (50°F)10°C (50°F)10°C (50°F)10°C (50°F)11°C (51°F)12°C (53°F)13°C (55°F)
Wind
Speed18km/h (11mph)18km/h (11mph)16km/h (10mph)14km/h (9mph)6km/h (4mph)6km/h (4mph)22km/h (14mph)12km/h (7mph)
Gusts30km/h (19mph)33km/h (20mph)23km/h (14mph)17km/h (10mph)9km/h (6mph)11km/h (7mph)23km/h (14mph)25km/h (16mph)
Direction 19°
NNE
38°
NE
58°
ENE
72°
ENE
57°
ENE
246°
WSW
270°
W
339°
NNW
Wind chill18°C (64°F)12°C (54°F)13°C (55°F)19°C (65°F)21°C (70°F)23°C (74°F)21°C (70°F)19°C (67°F)
Waves
Height0.4m (1.4ft)0.5m (1.5ft)0.3m (1.0ft)0.3m (0.9ft)0.1m (0.5ft)0.1m (0.5ft)0.4m (1.2ft)0.3m (1.0ft)
Direction 34°
NE
42°
NE
43°
NE
47°
NE
43°
NE
278°
W
278°
W
274°
W
Period3.8 sec.3.7 sec.3.6 sec.3.5 sec.2.3 sec.2.2 sec.2.2 sec.2.2 sec.
Significant height1.2m (3.9ft)1.0m (3.3ft)0.7m (2.3ft)0.6m (2ft)0.2m (0.7ft)0.7m (2.3ft)0.9m (3ft)0.7m (2.3ft)
Sea water temperature
Water temperature15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)

Sea weather on Wednesday 22 July 2026

On Wednesday 22 July 2026, the sun will rise at 05:22 and will set at 21:15 on the beach(es) of Cardiff. The outside temperature will be a high of 74°F t and a low of 59°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 17.4mph km/h (with gusts up to 19.3mph). Wave height will be up to 2ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature17°C (62°F)15°C (59°F)16°C (61°F)18°C (65°F)21°C (69°F)23°C (73°F)22°C (72°F)20°C (67°F)
Perceived temperature17°C (62°F)14°C (58°F)16°C (61°F)18°C (65°F)21°C (69°F)25°C (76°F)24°C (76°F)20°C (67°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity73%78%70%64%51%48%50%62%
Barometric pressure1027 hPa1026 hPa1026 hPa1025 hPa1024 hPa1021 hPa1020 hPa1022 hPa
Cloud cover14%18%4%47%9%45%24%11%
Heat index17°C (62°F)15°C (59°F)16°C (61°F)18°C (65°F)21°C (69°F)25°C (76°F)24°C (76°F)20°C (67°F)
Dew point12°C (54°F)11°C (52°F)11°C (51°F)11°C (52°F)10°C (50°F)11°C (52°F)11°C (52°F)12°C (54°F)
Wind
Speed13km/h (8mph)11km/h (7mph)6km/h (4mph)5km/h (3mph)13km/h (8mph)18km/h (11mph)13km/h (8mph)28km/h (17mph)
Gusts26km/h (16mph)22km/h (14mph)8km/h (5mph)7km/h (4mph)19km/h (12mph)29km/h (18mph)26km/h (16mph)31km/h (19mph)
Direction 39°
NE
27°
NNE
29°
NNE
263°
W
252°
WSW
272°
W
292°
WNW
32°
NNE
Wind chill17°C (62°F)14°C (58°F)16°C (61°F)18°C (65°F)21°C (69°F)23°C (73°F)22°C (72°F)20°C (67°F)
Waves
Height0.2m (0.6ft)0.2m (0.7ft)0.1m (0.5ft)0.1m (0.5ft)0.5m (1.6ft)0.6m (2.0ft)0.5m (1.8ft)0.5m (1.5ft)
Direction 275°
W
276°
W
280°
W
277°
W
267°
W
273°
W
282°
WNW
284°
WNW
Period2.6 sec.3.6 sec.3.5 sec.3.4 sec.3.4 sec.3.4 sec.3.4 sec.4.1 sec.
Significant height0.3m (1ft)0.5m (1.6ft)0.2m (0.7ft)0.5m (1.6ft)1.0m (3.3ft)0.8m (2.6ft)0.6m (2ft)1.3m (4.3ft)
Sea water temperature
Water temperature15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)

Sea weather on Thursday 23 July 2026

On Thursday 23 July 2026, the sun will rise at 05:24 and will set at 21:14 on the beach(es) of Cardiff. The outside temperature will be a high of 70°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 13.1mph km/h (with gusts up to 19.3mph). Wave height will be up to 1.3ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature16°C (60°F)14°C (57°F)15°C (58°F)18°C (65°F)19°C (66°F)21°C (70°F)20°C (68°F)17°C (63°F)
Perceived temperature16°C (60°F)13°C (55°F)14°C (57°F)18°C (65°F)19°C (66°F)21°C (70°F)20°C (68°F)17°C (63°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity82%90%83%65%62%53%56%66%
Barometric pressure1023 hPa1024 hPa1024 hPa1024 hPa1024 hPa1022 hPa1021 hPa1022 hPa
Cloud cover9%12%30%64%13%6%7%2%
Heat index16°C (60°F)14°C (57°F)15°C (58°F)18°C (65°F)19°C (66°F)24°C (76°F)20°C (68°F)17°C (63°F)
Dew point13°C (55°F)12°C (54°F)12°C (53°F)11°C (53°F)12°C (53°F)11°C (52°F)11°C (52°F)11°C (52°F)
Wind
Speed17km/h (11mph)14km/h (9mph)11km/h (7mph)6km/h (4mph)7km/h (4mph)14km/h (9mph)21km/h (13mph)14km/h (9mph)
Gusts31km/h (19mph)25km/h (15mph)16km/h (10mph)7km/h (5mph)12km/h (7mph)26km/h (16mph)27km/h (17mph)30km/h (19mph)
Direction 22°
NNE
32°
NNE
56°
NE
72°
ENE
245°
WSW
264°
W
266°
W
280°
W
Wind chill16°C (60°F)13°C (55°F)14°C (57°F)18°C (65°F)19°C (66°F)21°C (70°F)20°C (68°F)17°C (63°F)
Waves
Height0.4m (1.5ft)0.3m (1.0ft)0.2m (0.8ft)0.1m (0.5ft)0.3m (1.1ft)0.2m (0.6ft)0.3m (0.9ft)0.3m (1.0ft)
Direction 27°
NNE
30°
NNE
37°
NE
275°
W
275°
W
275°
W
272°
W
274°
W
Period4.6 sec.4.4 sec.3.6 sec.3.3 sec.3.3 sec.3.3 sec.3.3 sec.3.3 sec.
Significant height0.7m (2.3ft)0.6m (2ft)0.5m (1.6ft)0.2m (0.7ft)0.1m (0.3ft)0.4m (1.3ft)0.7m (2.3ft)0.7m (2.3ft)
Sea water temperature
Water temperature15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)

Sea weather on Friday 24 July 2026

On Friday 24 July 2026, the sun will rise at 05:25 and will set at 21:13 on the beach(es) of Cardiff. The outside temperature will be a high of 68°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 19.3mph km/h (with gusts up to 23mph). Wave height will be up to 1.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature15°C (60°F)14°C (57°F)15°C (60°F)19°C (66°F)19°C (67°F)20°C (68°F)18°C (65°F)16°C (61°F)
Perceived temperature15°C (60°F)15°C (59°F)15°C (60°F)19°C (66°F)19°C (67°F)20°C (68°F)18°C (65°F)16°C (61°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity65%70%64%54%55%57%57%74%
Barometric pressure1022 hPa1021 hPa1021 hPa1020 hPa1018 hPa1017 hPa1016 hPa1016 hPa
Cloud cover2%2%2%4%1%3%3%92%
Heat index15°C (60°F)14°C (57°F)15°C (60°F)19°C (66°F)19°C (67°F)20°C (68°F)18°C (65°F)16°C (61°F)
Dew point9°C (48°F)9°C (48°F)9°C (47°F)10°C (49°F)10°C (50°F)11°C (52°F)9°C (49°F)11°C (52°F)
Wind
Speed6km/h (4mph)4km/h (2mph)4km/h (3mph)8km/h (5mph)21km/h (13mph)31km/h (19mph)31km/h (19mph)21km/h (13mph)
Gusts12km/h (8mph)7km/h (4mph)7km/h (4mph)10km/h (6mph)23km/h (15mph)33km/h (20mph)37km/h (23mph)22km/h (14mph)
Direction 331°
NNW
351°
N
302°
WNW
259°
W
258°
WSW
272°
W
274°
W
273°
W
Wind chill15°C (60°F)15°C (59°F)15°C (60°F)19°C (66°F)19°C (67°F)20°C (68°F)18°C (65°F)16°C (61°F)
Waves
Height0.2m (0.7ft)0.1m (0.5ft)0.1m (0.4ft)0.5m (1.6ft)0.1m (0.4ft)0.3m (1.1ft)0.5m (1.8ft)0.5m (1.7ft)
Direction 274°
W
274°
W
275°
W
275°
W
275°
W
269°
W
271°
W
269°
W
Period3.3 sec.2.4 sec.3.6 sec.3.1 sec.3.1 sec.3.1 sec.3.1 sec.3.1 sec.
Significant height0.6m (2ft)0.2m (0.7ft)0.3m (1ft)0.1m (0.3ft)0.5m (1.6ft)0.9m (3ft)1.0m (3.3ft)1.0m (3.3ft)
Sea water temperature
Water temperature15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)

Sea weather on Saturday 25 July 2026

On Saturday 25 July 2026, the sun will rise at 05:27 and will set at 21:11 on the beach(es) of Cardiff. The outside temperature will be a high of 65°F t and a low of 59°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 28mph km/h (with gusts up to 36mph). Wave height will be up to 3.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature15°C (60°F)15°C (59°F)16°C (61°F)18°C (64°F)18°C (64°F)18°C (64°F)16°C (62°F)17°C (63°F)
Perceived temperature15°C (60°F)15°C (59°F)16°C (61°F)18°C (64°F)18°C (64°F)18°C (64°F)16°C (62°F)17°C (63°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity82%86%78%64%67%74%91%93%
Barometric pressure1015 hPa1014 hPa1013 hPa1013 hPa1011 hPa1010 hPa1009 hPa1009 hPa
Cloud cover40%49%19%50%100%65%95%100%
Heat index15°C (60°F)15°C (59°F)16°C (61°F)18°C (64°F)18°C (64°F)18°C (64°F)16°C (62°F)17°C (63°F)
Dew point12°C (54°F)13°C (55°F)12°C (54°F)11°C (51°F)12°C (53°F)13°C (56°F)15°C (59°F)16°C (61°F)
Wind
Speed17km/h (11mph)17km/h (11mph)20km/h (12mph)29km/h (18mph)39km/h (24mph)45km/h (28mph)38km/h (24mph)31km/h (19mph)
Gusts32km/h (20mph)31km/h (19mph)29km/h (18mph)37km/h (23mph)51km/h (32mph)58km/h (36mph)42km/h (26mph)47km/h (29mph)
Direction 275°
W
276°
W
274°
W
272°
W
273°
W
268°
W
266°
W
268°
W
Wind chill15°C (60°F)15°C (59°F)16°C (61°F)18°C (64°F)18°C (64°F)18°C (64°F)16°C (62°F)17°C (63°F)
Waves
Height0.5m (1.7ft)0.4m (1.3ft)0.3m (1.0ft)0.4m (1.2ft)0.6m (2.1ft)0.8m (2.8ft)1.0m (3.4ft)1.1m (3.7ft)
Direction 272°
W
274°
W
273°
W
270°
W
275°
W
273°
W
269°
W
267°
W
Period3.1 sec.3.1 sec.3.1 sec.3.1 sec.3.1 sec.3.1 sec.3.1 sec.3.1 sec.
Significant height0.9m (3ft)0.7m (2.3ft)0.7m (2.3ft)0.8m (2.6ft)1.3m (4.3ft)1.4m (4.6ft)1.4m (4.6ft)1.4m (4.6ft)
Sea water temperature
Water temperature15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)15°C (59°F)

Sea weather chart over the next 7 days

Outside temperature

Wind speed

Precipitation

Wave height

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