Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 12 pm 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
15.8°C
1.4° 

Castlerock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Castlerock today (25 Aug):

  • Morning surf: Morning surf (25 Aug, local time) - 1.5ft (0.4m), 10s period with WNW swell.
  • Afternoon surf: Afternoon surf (25 Aug, local time) - 1ft (0.3m), 9s period with WNW swell.
  • Evening surf: Evening surf (25 Aug, local time) - 0.5ft (0.2m), 9s period with W swell.

The current surf forecast for Castlerock at 4PM is: 0.3m 9s primary swell from a West-northwest direction (forecast issued at 12:00pm August 25). An open ocean swell of 0.5m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (BST) & DateWave HeightWave Period
Morning (25 Aug)1.5ft (0.4m)10s
Afternoon (25 Aug)1ft (0.3m)9s
Evening (25 Aug)0.5ft (0.2m)9s

Table - waves today at Castlerock. (Swell directed towards the surf break)


Short Range Forecast

Light rain (total 2mm), mostly falling on Tue night. Very mild (max 19°C on Thu afternoon, min 14°C on Tue night). Wind will be generally light.

Tue
25
Wednesday
26
Thursday
27
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
WNW
10
0.3
WNW
10
0.3
WNW
9
0.2
WNW
9
0.2
W
9
0.4
ENE
3
0.8
E
4
0.9
E
5
0.8
E
4
0.7
E
4
0.5
E
4
0.4
ENE
4
0.2
WNW
10
0.2
WNW
10
0.4
NW
10
0.4
NW
10
0.4
NW
9
0.4
NW
9
0.4
NW
9
0.4
NW
9
0.3
WNW
9
Wave Graph
Metric surfscale
Energy kJ
33
18
17
8
6
3
22
34
25
16
7
5
10
10
24
23
22
21
20
20
15
Wind (km/h)
20
ESE
25
ESE
20
ESE
15
E
15
ESE
20
E
25
E
25
E
20
ESE
20
E
20
ESE
15
ENE
10
E
10
ESE
10
ESE
5
ESE
10
E
15
E
15
ENE
10
ENE
5
N
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross-off
cross
cross-off
cross
cross
cross-off
cross-off
cross-off
cross
cross
cross-on
cross
glassy
High Tide
5:55PM1.59m
5:58AM1.43m
6:23PM1.72m
6:26AM1.53m
6:51PM1.84m
Low Tide
11:46AM0.35m
00:25AM0.38m
12:17PM0.22m
00:54AM0.29m
12:45PM0.12m
clear
cloud
part cloud
cloud
cloud
light rain
cloud
cloud
cloud
cloud
cloud
light rain
part cloud
cloud
clear
clear
clear
clear
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:20
6:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:37
8:36
8:32
 mm
1
1
Temp °C
15
17
18
17
16
14
14
14
15
16
17
17
16
16
15
14
16
18
19
18
17
Feels °C
11
12
14
14
14
11
9
10
12
13
15
16
15
15
14
14
15
16
18
17
18
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castlerock surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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