Cold Knap, Barry (Beach) (Vale of Glamorgan) weather

Find a forecast

Here are our top tips to keep you, your friends and family safe at the beach with links to Royal National Lifeboat Institution (RNLI) and Met Office advice.

Head to a lifeguarded beach; check the RNLI lifeguarded beach tool
Follow RNLI Float to Live advice if you find yourself struggling in the water
Know what to do if you get caught in a rip current (RNLI)
Check the tide times to avoid getting cut off by the tide coming in
Call 999 and ask for the coastguard in an emergency
Learn more about staying safe at the beach

Weather forecast Beach forecast

Forecast days

Today

Maximum daytime temperature: 6° Celsius; Minimum nighttime temperature: 1° Celsius;

Sunrise: 08:18

Sunset: 16:09

Yellow weather warning.

L UV

L Pollution

No pollen data.

Today

Maximum daytime temperature: 6° Celsius; Minimum nighttime temperature: 1° Celsius;
Fri 26 Dec

Maximum daytime temperature: 5° Celsius; Minimum nighttime temperature: 2° Celsius;

Sunrise: 08:18

Sunset: 16:10

Overcast changing to sunny intervals by lunchtime.

L UV

L Pollution

No pollen data.

Fri 26 Dec

Maximum daytime temperature: 5° Celsius; Minimum nighttime temperature: 2° Celsius;
Sat 27 Dec

Maximum daytime temperature: 8° Celsius; Minimum nighttime temperature: 5° Celsius;

Sunrise: 08:18

Sunset: 16:10

Clear changing to overcast in the afternoon.

L UV

L Pollution

No pollen data.

Sat 27 Dec

Maximum daytime temperature: 8° Celsius; Minimum nighttime temperature: 5° Celsius;
Sun 28 Dec

Maximum daytime temperature: 7° Celsius; Minimum nighttime temperature: 2° Celsius;

Sunrise: 08:19

Sunset: 16:11

Overcast.

L UV

L Pollution

No pollen data.

Sun 28 Dec

Maximum daytime temperature: 7° Celsius; Minimum nighttime temperature: 2° Celsius;
Mon 29 Dec

Maximum daytime temperature: 6° Celsius; Minimum nighttime temperature: 4° Celsius;

Sunrise: 08:19

Sunset: 16:12

Partly cloudy changing to sunny intervals by late morning.

L UV

L Pollution

No pollen data.

Mon 29 Dec

Maximum daytime temperature: 6° Celsius; Minimum nighttime temperature: 4° Celsius;
Tue 30 Dec

Maximum daytime temperature: 7° Celsius; Minimum nighttime temperature: 3° Celsius;

Sunrise: 08:19

Sunset: 16:13

Overcast.

L UV

No pollution data.

No pollen data.

Tue 30 Dec

Maximum daytime temperature: 7° Celsius; Minimum nighttime temperature: 3° Celsius;
Wed 31 Dec

Maximum daytime temperature: 8° Celsius; Minimum nighttime temperature: 3° Celsius;

Sunrise: 08:19

Sunset: 16:14

Overcast.

L UV

No pollution data.

No pollen data.

Wed 31 Dec

Maximum daytime temperature: 8° Celsius; Minimum nighttime temperature: 3° Celsius;

Yellow weather warning.

Sunrise: 08:18

Sunset: 16:09

L UV

L Pollution

No pollen data.

Yellow warning: Wind

7 day forecast for Cold Knap, Barry (Beach)

Today (25 December 2025)

Time	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	3°	4°	4°	5°	5°	5°	5°	4°	4°	3°	3°	2°	2°	2°	2°
Feels like temperature (°C)	-3°	-2°	-2°	-1°	0°	0°	0°	-1°	-2°	-2°	-3°	-3°	-3°	-3°	-3°
Wind direction and speed (mph)	NE 24	NE 25	ENE 26	ENE 28	ENE 27	ENE 25	ENE 23	ENE 21	ENE 20	ENE 19	ENE 18	ENE 17	ENE 16	ENE 16	ENE 16
Wind gust (mph)	45	46	46	46	43	40	38	36	35	34	34	34	33	32	32
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	75%	72%	64%	56%	50%	48%	51%	54%	55%	57%	62%	65%	68%	71%	75%
UV	1	1	1	1	1	1	1	1	-	-	-	-	-	-	-
Wind direction and speed (mph)	23	25	26	27	27	25	23	21	19	18	17	17	16	15	15
Height of waves offshore (m)	1.0	0.9	0.8	0.8	0.7	0.7	0.7	0.7	0.7	0.8	0.8	0.8	0.7	0.6	0.6
Period of waves offshore (s)	4	4	4	4	4	3	3	3	3	4	4	4	4	4	3
Direction of waves offshore

Friday (26 December 2025)

Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	2°	2°	2°	2°	2°	2°	2°	2°	2°	2°	2°	3°	4°	4°	5°	5°	5°	4°	4°	4°	4°	4°	3°	3°
Feels like temperature (°C)	-3°	-3°	-3°	-3°	-3°	-3°	-3°	-3°	-3°	-3°	-3°	-2°	-1°	0°	0°	1°	0°	0°	0°	-1°	-1°	-1°	-1°	-1°
Wind direction and speed (mph)	ENE 16	ENE 15	ENE 15	ENE 14	ENE 14	ENE 14	ENE 14	ENE 14	ENE 14	ENE 14	ENE 15	ENE 16	ENE 17	ENE 17	ENE 17	ENE 16	ENE 15	ENE 15	ENE 15	ENE 15	ENE 15	ENE 15	ENE 15	ENE 15
Wind gust (mph)	30	29	28	28	28	27	27	27	28	29	30	30	30	30	30	29	30	29	29	30	30	29	29	29
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	G
Humidity	75%	75%	76%	76%	76%	77%	78%	80%	82%	81%	79%	77%	75%	73%	72%	73%	74%	76%	79%	81%	81%	82%	83%	83%
UV	-	-	-	-	-	-	-	-	1	1	1	1	1	1	1	1	1	-	-	-	-	-	-	-
Wind direction and speed (mph)	15	15	15	15	14	14	14	14	14	14	15	16	17	17	17	16	15	15	15	15	16	15	15	15
Height of waves offshore (m)	0.5	0.4	0.4	0.3	0.3	0.4	0.5	0.6	0.6	0.6	0.6	0.5	0.4	0.4	0.3	0.3	0.3	0.4	0.5	0.6	0.6	0.7	0.7	0.6
Period of waves offshore (s)	3	3	3	3	3	3	3	3	4	4	4	3	3	3	3	3	3	3	3	3	3	4	4	4
Direction of waves offshore

Saturday (27 December 2025)

Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	3°	3°	3°	3°	3°	3°	3°	3°	3°	4°	4°	5°	6°	7°	7°	7°	7°	7°	7°	7°	7°	7°	7°	7°
Feels like temperature (°C)	-2°	-2°	-2°	-2°	-2°	-2°	-2°	-2°	-2°	-1°	0°	1°	2°	3°	3°	3°	3°	3°	3°	3°	3°	3°	3°	3°
Wind direction and speed (mph)	ENE 15	ENE 15	NE 15	NE 14	NE 15	NE 15	NE 15	NE 16	NE 17	NE 17	ENE 18	ENE 18	ENE 19	ENE 18	ENE 18	ENE 18	ENE 18	ENE 18	ENE 19	ENE 19	ENE 18	ENE 18	ENE 17	ENE 17
Wind gust (mph)	29	29	29	29	29	29	31	32	33	34	34	34	33	32	30	30	31	32	32	32	32	31	29	29
Visibility (description)	G	G	G	G	G	G	G	G	G	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	83%	83%	83%	84%	85%	85%	86%	87%	88%	87%	85%	83%	77%	76%	76%	77%	81%	83%	85%	85%	85%	84%	84%	84%
UV	-	-	-	-	-	-	-	-	1	1	1	1	1	1	1	1	1	-	-	-	-	-	-	-
Wind direction and speed (mph)	15	15	15	14	15	15	15	16	17	17	18	18	19	18	18	18	18	18	19	19	18	18	17	17
Height of waves offshore (m)	0.5	0.4	0.4	0.3	0.3	0.4	0.5	0.6	0.6	0.7	0.7	0.6	0.6	0.8	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.6
Period of waves offshore (s)	3	3	3	3	2	3	3	3	3	4	4	4	3	4	4	4	4	3	3	4	3	3	3	3
Direction of waves offshore

Sunday (28 December 2025)

Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	7°	7°	7°	7°	7°	7°	6°	6°	6°	6°	6°	7°	7°	7°	7°	7°	6°	6°	6°	6°	5°	5°	5°	4°
Feels like temperature (°C)	4°	4°	4°	3°	3°	3°	3°	2°	2°	2°	2°	3°	3°	3°	3°	3°	3°	3°	2°	2°	2°	2°	1°	1°
Wind direction and speed (mph)	ENE 16	ENE 15	ENE 15	ENE 15	ENE 14	ENE 14	ENE 14	ENE 13	ENE 13	ENE 13	ENE 14	ENE 14	ENE 14	ENE 14	ENE 14	ENE 13	ENE 11	ENE 11	ENE 11	ENE 10	ENE 10	NE 10	NE 9	NE 9
Wind gust (mph)	28	28	27	26	26	26	26	25	25	25	26	25	24	24	23	21	21	20	19	20	19	18	18	18
Visibility (description)	VG	VG	E	E	E	E	VG	VG	VG	VG	VG	E	E	E	E	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	83%	84%	84%	84%	83%	79%	78%	79%	77%	77%	75%	75%	74%	73%	73%	73%	75%	75%	77%	77%	77%	83%	84%	84%
UV	-	-	-	-	-	-	-	-	1	1	1	1	1	1	1	1	1	-	-	-	-	-	-	-
Wind direction and speed (mph)	16	15	15	15	14	14	14	13	13	13	14	14	15	14	14	13	12	11	11	10	10	10	9	9
Height of waves offshore (m)	0.6	0.6	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.3	0.3	0.3
Period of waves offshore (s)	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	7
Direction of waves offshore

Monday (29 December 2025)

Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	4°	4°	4°	3°	3°	3°	3°	3°	3°	3°	4°	5°	5°	6°	6°	6°	5°	4°	4°	4°	5°	5°	5°	5°
Feels like temperature (°C)	1°	1°	0°	0°	0°	-1°	-1°	-1°	-1°	0°	1°	1°	2°	3°	3°	3°	2°	2°	1°	1°	2°	2°	2°	2°
Wind direction and speed (mph)	NE 9	NE 9	NE 9	NE 9	NE 9	NE 9	NE 8	NE 8	NE 8	NE 8	NE 8	ENE 9	ENE 10	ENE 10	ENE 10	ENE 9	NE 8	NE 8	NE 8	NE 8	NE 8	NE 8	NE 8	NE 8
Wind gust (mph)	18	17	18	17	18	17	16	15	15	16	18	18	18	18	17	15	16	15	15	14	14	13	13	13
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	G	G	G	G	G	G
Humidity	85%	86%	87%	88%	88%	88%	89%	90%	91%	90%	85%	81%	78%	76%	76%	78%	83%	84%	84%	85%	86%	86%	86%	87%
UV	-	-	-	-	-	-	-	-	1	1	1	1	1	1	1	1	1	-	-	-	-	-	-	-
Wind direction and speed (mph)	9	9	9	9	9	9	8	8	8	8	8	9	10	10	10	9	8	8	8	8	8	8	8	8
Height of waves offshore (m)	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.3	0.2	0.2	0.2	0.2
Period of waves offshore (s)	7	8	5	5	8	5	5	3	3	5	8	11	14	14	14	13	13	13	13	13	13	13	13	13
Direction of waves offshore

Tuesday (30 December 2025)

Time	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	5°	5°	5°	5°	6°	7°	6°	5°
Feels like temperature (°C)	2°	2°	2°	3°	4°	4°	3°	3°
Wind direction and speed (mph)	NE 8	NE 7	NE 7	NE 7	NE 8	NE 8	NE 7	NE 7
Wind gust (mph)	15	13	11	12	12	12	10	9
Visibility (description)	G	G	G	G	VG	VG	VG	VG
Humidity	87%	88%	87%	88%	81%	80%	84%	85%
UV	-	-	-	1	1	1	-	-
Wind direction and speed (mph)	8	7	7	7	8	7	7	7
Height of waves offshore (m)	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2
Period of waves offshore (s)	13	12	12	12	12	14	15	14
Direction of waves offshore

Wednesday (31 December 2025)

Time	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00
Weather symbols
Chance of precipitation	10%	10%	10%	10%	<5%	<5%	10%	10%
Temperature (°C)	5°	5°	5°	5°	7°	7°	5°	5°
Feels like temperature (°C)	2°	2°	2°	3°	4°	5°	3°	3°
Wind direction and speed (mph)	NE 7	NNE 7	NNE 7	NNE 6	N 8	N 8	NNW 7	NW 7
Wind gust (mph)	9	10	10	11	12	9	9	10
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	85%	86%	84%	83%	74%	75%	85%	85%
UV	-	-	-	1	1	1	-	-
Wind direction and speed (mph)	7	–	–	–	–	–	–	–
Height of waves offshore (m)	0.3	–	–	–	–	–	–	–
Period of waves offshore (s)	14	–	–	–	–	–	–	–
Direction of waves offshore		–	–	–	–	–	–	–