Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 12 am 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
15.4° C
1.0° 

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 (05 Aug):

  • Morning surf: Morning surf (05 Aug, local time) - 4.5ft (1.3m), 6s period with NW swell.
  • Afternoon surf: Afternoon surf (05 Aug, local time) - 7ft (2.1m), 8s period with NW swell.
  • Evening surf: Evening surf (05 Aug, local time) - 8ft (2.4m), 9s period with NNW swell.

The current surf forecast for Castlerock at 9AM is: 1.3m 6s primary swell from a Northwest direction and 0.4m 10s secondary swell from a North-northwest direction (forecast issued at 12:00am August 05). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (05 Aug)4.5ft (1.3m)6s
Afternoon (05 Aug)7ft (2.1m)8s
Evening (05 Aug)8ft (2.4m)9s

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


Short Range Forecast

Light rain (total 7mm), mostly falling on Wed morning. Very mild (max 19°C on Fri afternoon, min 12°C on Wed night). Winds decreasing (strong winds from the WNW on Wed afternoon, calm by Fri afternoon).

Wednesday
5
Thursday
6
Friday
7
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
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
2
2
2
Swell
Height Map
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
NNW
9
0.4
NNW
10
0.8
WNW
6
1.3
NW
6
2
NW
8
2.3
NW
8
2.4
NW
9
2.3
NNW
9
2.1
NNW
8
1.7
NNW
7
1.3
NNW
7
1.1
NNW
7
0.9
NNW
6
0.7
NW
6
0.6
NNW
6
0.5
NW
6
0.4
NW
5
0.4
NW
5
0.4
NW
5
0.6
WNW
7
0.9
NW
8
1.2
NW
10
1.4
NW
10
1.2
NW
10
Wave Graph
Metric surfscale
Energy kJ
34
37
49
126
453
686
870
789
532
310
168
107
60
37
22
15
9
10
7
37
105
281
370
286
Wind (km/h)
25
W
30
WSW
30
W
35
WNW
35
WNW
40
WNW
40
WNW
35
WNW
30
NW
25
WNW
20
WNW
20
WNW
20
WNW
20
WNW
10
W
15
SW
15
SSW
15
SSW
15
SSW
20
SW
20
SW
15
WSW
5
WSW
10
SE
Wind State
cross
cross-off
cross
cross-on
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross
cross-off
cross-off
off
off
cross-off
cross-off
cross-off
glassy
cross-off
High Tide
10:33PM1.64m
10:49AM1.36m
11:20PM1.51m
11:47AM1.27m
00:27AM1.37m
1:17PM1.21m
Low Tide
4:58AM0.43m
4:51PM0.41m
5:49AM0.51m
5:54PM0.53m
7:03AM0.58m
7:32PM0.61m
part cloud
part cloud
cloud
light rain
light rain
light rain
light rain
light rain
rain showers
cloud
clear
part cloud
part cloud
part cloud
cloud
cloud
part cloud
part cloud
cloud
part cloud
cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:41
5:43
5:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:22
9:21
9:19
 mm
2
1
1
1
1
1
Temp °C
14
14
14
13
13
13
13
12
13
12
12
13
15
15
16
14
13
12
12
14
17
19
19
16
Feels °C
10
9
9
7
6
5
6
6
7
7
7
9
11
11
14
11
10
9
9
10
13
16
18
15
  • 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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