Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 12 pm 17 Jul 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
16.3° C
2.5° 

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 (17 Jul):

  • Morning surf: Morning surf (17 Jul, local time) - 2.5ft (0.8m), 5s period with NNW swell.
  • Afternoon surf: Afternoon surf (17 Jul, local time) - 3.5ft (1.1m), 6s period with NNW swell.
  • Evening surf: Evening surf (17 Jul, local time) - 4.5ft (1.3m), 6s period with NNW swell.

The current surf forecast for Castlerock at 7PM is: 1.3m 6s primary swell from a North-northwest direction and 0.3m 10s secondary swell from a Northwest direction (forecast issued at 12:00pm July 17). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (17 Jul)2.5ft (0.8m)5s
Afternoon (17 Jul)3.5ft (1.1m)6s
Evening (17 Jul)4.5ft (1.3m)6s

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


Short Range Forecast

Mostly dry. Very mild (max 14°C on Fri afternoon, min 12°C on Fri night). Wind will be generally light.

Fri
17
Saturday
18
Sunday
19
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)
0.9
NNW
6
1.1
NNW
6
1.2
NNW
6
1.3
NNW
6
1.3
NNW
7
1.1
NNW
7
1.4
NNW
6
1.2
NNW
6
1.1
NNW
6
1
NNW
6
1
NNW
6
1
NNW
6
0.9
NNW
7
1
NNW
7
1
NNW
7
1
NNW
7
0.9
NNW
7
0.8
NNW
7
0.7
NNW
7
0.7
NNW
7
0.6
NNW
7
Wave Graph
Metric surfscale
Energy kJ
45
82
103
125
152
110
155
108
83
69
71
78
68
93
85
85
73
54
41
41
30
Wind (km/h)
20
NW
20
NNW
25
NNW
25
NW
25
NW
25
NNW
25
NW
25
NNW
25
NNW
25
NNW
20
NNW
20
NNW
15
NW
15
NW
15
WNW
15
NW
20
NW
15
NNW
20
NNW
20
NW
15
NW
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
8:45AM1.55m
9:18PM2.00m
9:25AM1.48m
10:00PM1.89m
10:04AM1.39m
Low Tide
3:00PM0.02m
3:59AM0.22m
3:40PM0.08m
4:40AM0.32m
4:21PM0.19m
cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
part cloud
clear
cloud
clear
cloud
cloud
clear
clear
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:09
5:09
5:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:55
9:53
9:52
 mm
Temp °C
13
13
13
14
13
13
12
12
13
12
13
13
13
13
12
12
13
14
14
14
14
Feels °C
10
10
9
9
9
8
8
8
9
7
9
9
11
11
10
10
10
11
11
11
12
  • 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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